1931 lines
56 KiB
JavaScript
1931 lines
56 KiB
JavaScript
/*!
|
|
* Module dependencies
|
|
*/
|
|
var ModelBuilder = require('./model-builder.js').ModelBuilder;
|
|
var ModelDefinition = require('./model-definition.js');
|
|
var RelationDefinition = require('./relation-definition.js');
|
|
var jutil = require('./jutil');
|
|
var utils = require('./utils');
|
|
var ModelBaseClass = require('./model.js');
|
|
var DataAccessObject = require('./dao.js');
|
|
var defineScope = require('./scope.js').defineScope;
|
|
var EventEmitter = require('events').EventEmitter;
|
|
var util = require('util');
|
|
var assert = require('assert');
|
|
var async = require('async');
|
|
var traverse = require('traverse');
|
|
|
|
if (process.env.DEBUG === 'loopback') {
|
|
// For back-compatibility
|
|
process.env.DEBUG = 'loopback:*';
|
|
}
|
|
var debug = require('debug')('loopback:datasource');
|
|
|
|
/*!
|
|
* Export public API
|
|
*/
|
|
exports.DataSource = DataSource;
|
|
|
|
/*!
|
|
* Helpers
|
|
*/
|
|
var slice = Array.prototype.slice;
|
|
|
|
/**
|
|
* LoopBack models can manipulate data via the DataSource object.
|
|
* Attaching a `DataSource` to a `Model` adds instance methods and static methods to the `Model`;
|
|
* some of the added methods may be remote methods.
|
|
*
|
|
* Define a data source for persisting models.
|
|
* Typically, you create a DataSource by calling createDataSource() on the LoopBack object; for example:
|
|
* ```js
|
|
* var oracle = loopback.createDataSource({
|
|
* connector: 'oracle',
|
|
* host: '111.22.333.44',
|
|
* database: 'MYDB',
|
|
* username: 'username',
|
|
* password: 'password'
|
|
* });
|
|
* ```
|
|
*
|
|
* All classes in single dataSource share same the connector type and
|
|
* one database connection. The `settings` argument is an object that can have the following properties:
|
|
* - host
|
|
* - port
|
|
* - username
|
|
* - password
|
|
* - database
|
|
* - debug (Boolean, default is false)
|
|
*
|
|
* @desc For example, the following creates a DataSource, and waits for a connection callback.
|
|
* ```
|
|
* var dataSource = new DataSource('mysql', { database: 'myapp_test' });
|
|
* dataSource.define(...);
|
|
* dataSource.on('connected', function () {
|
|
* // work with database
|
|
* });
|
|
* ```
|
|
* @class Define new DataSource
|
|
* @param {String} name Type of dataSource connector (mysql, mongoose, oracle, redis)
|
|
* @param {Object} settings Database-specific settings to establish connection (settings depend on specific connector). See above.
|
|
*/
|
|
function DataSource(name, settings, modelBuilder) {
|
|
if (!(this instanceof DataSource)) {
|
|
return new DataSource(name, settings);
|
|
}
|
|
|
|
// Check if the settings object is passed as the first argument
|
|
if (typeof name === 'object' && settings === undefined) {
|
|
settings = name;
|
|
name = undefined;
|
|
}
|
|
|
|
// Check if the first argument is a URL
|
|
if (typeof name === 'string' && name.indexOf('://') !== -1) {
|
|
name = utils.parseSettings(name);
|
|
}
|
|
|
|
// Check if the settings is in the form of URL string
|
|
if (typeof settings === 'string' && settings.indexOf('://') !== -1) {
|
|
settings = utils.parseSettings(settings);
|
|
}
|
|
|
|
this.modelBuilder = modelBuilder || new ModelBuilder();
|
|
this.models = this.modelBuilder.models;
|
|
this.definitions = this.modelBuilder.definitions;
|
|
|
|
// operation metadata
|
|
// Initialize it before calling setup as the connector might register operations
|
|
this._operations = {};
|
|
|
|
this.setup(name, settings);
|
|
|
|
this._setupConnector();
|
|
|
|
// connector
|
|
var connector = this.connector;
|
|
|
|
// DataAccessObject - connector defined or supply the default
|
|
var dao = (connector && connector.DataAccessObject) || this.constructor.DataAccessObject;
|
|
this.DataAccessObject = function () {
|
|
};
|
|
|
|
// define DataAccessObject methods
|
|
Object.keys(dao).forEach(function (name) {
|
|
var fn = dao[name];
|
|
this.DataAccessObject[name] = fn;
|
|
|
|
if (typeof fn === 'function') {
|
|
this.defineOperation(name, {
|
|
accepts: fn.accepts,
|
|
'returns': fn.returns,
|
|
http: fn.http,
|
|
remoteEnabled: fn.shared ? true : false,
|
|
scope: this.DataAccessObject,
|
|
fnName: name
|
|
});
|
|
}
|
|
}.bind(this));
|
|
|
|
// define DataAccessObject.prototype methods
|
|
Object.keys(dao.prototype).forEach(function (name) {
|
|
var fn = dao.prototype[name];
|
|
this.DataAccessObject.prototype[name] = fn;
|
|
if (typeof fn === 'function') {
|
|
this.defineOperation(name, {
|
|
prototype: true,
|
|
accepts: fn.accepts,
|
|
'returns': fn.returns,
|
|
http: fn.http,
|
|
remoteEnabled: fn.shared ? true : false,
|
|
scope: this.DataAccessObject.prototype,
|
|
fnName: name
|
|
});
|
|
}
|
|
}.bind(this));
|
|
|
|
}
|
|
|
|
util.inherits(DataSource, EventEmitter);
|
|
|
|
// allow child classes to supply a data access object
|
|
DataSource.DataAccessObject = DataAccessObject;
|
|
|
|
/**
|
|
* Set up the connector instance for backward compatibility with JugglingDB schema/adapter
|
|
* @private
|
|
*/
|
|
DataSource.prototype._setupConnector = function () {
|
|
this.connector = this.connector || this.adapter; // The legacy JugglingDB adapter will set up `adapter` property
|
|
this.adapter = this.connector; // Keep the adapter as an alias to connector
|
|
if (this.connector) {
|
|
if (!this.connector.dataSource) {
|
|
// Set up the dataSource if the connector doesn't do so
|
|
this.connector.dataSource = this;
|
|
}
|
|
var dataSource = this;
|
|
this.connector.log = function (query, start) {
|
|
dataSource.log(query, start);
|
|
};
|
|
|
|
this.connector.logger = function (query) {
|
|
var t1 = Date.now();
|
|
var log = this.log;
|
|
return function (q) {
|
|
log(q || query, t1);
|
|
};
|
|
};
|
|
}
|
|
};
|
|
|
|
// List possible connector module names
|
|
function connectorModuleNames(name) {
|
|
var names = []; // Check the name as is
|
|
if (!name.match(/^\//)) {
|
|
names.push('./connectors/' + name); // Check built-in connectors
|
|
if (name.indexOf('loopback-connector-') !== 0) {
|
|
names.push('loopback-connector-' + name); // Try loopback-connector-<name>
|
|
}
|
|
}
|
|
// Only try the short name if the connector is not from StrongLoop
|
|
if(['mongodb', 'oracle', 'mysql', 'postgresql', 'mssql', 'rest', 'soap']
|
|
.indexOf(name) === -1) {
|
|
names.push(name);
|
|
}
|
|
return names;
|
|
}
|
|
|
|
// testable with DI
|
|
function tryModules(names, loader) {
|
|
var mod;
|
|
loader = loader || require;
|
|
for (var m = 0; m < names.length; m++) {
|
|
try {
|
|
mod = loader(names[m]);
|
|
} catch (e) {
|
|
/* ignore */
|
|
}
|
|
if (mod) {
|
|
break;
|
|
}
|
|
}
|
|
return mod;
|
|
}
|
|
|
|
/*!
|
|
* Resolve a connector by name
|
|
* @param name The connector name
|
|
* @returns {*}
|
|
* @private
|
|
*/
|
|
DataSource._resolveConnector = function (name, loader) {
|
|
var names = connectorModuleNames(name);
|
|
var connector = tryModules(names, loader);
|
|
var error = null;
|
|
if (!connector) {
|
|
error = util.format('\nWARNING: LoopBack connector "%s" is not installed ' +
|
|
'as any of the following modules:\n\n %s\n\nTo fix, run:\n\n npm install %s\n',
|
|
name, names.join('\n'), names[names.length -1]);
|
|
}
|
|
return {
|
|
connector: connector,
|
|
error: error
|
|
};
|
|
};
|
|
|
|
/**
|
|
* Set up the data source
|
|
* @param {String} name The name
|
|
* @param {Object} settings The settings
|
|
* @returns {*}
|
|
* @private
|
|
*/
|
|
DataSource.prototype.setup = function (name, settings) {
|
|
var dataSource = this;
|
|
var connector;
|
|
|
|
// support single settings object
|
|
if (name && typeof name === 'object' && !settings) {
|
|
settings = name;
|
|
name = undefined;
|
|
}
|
|
|
|
if (typeof settings === 'object') {
|
|
if (settings.initialize) {
|
|
connector = settings;
|
|
} else if (settings.connector) {
|
|
connector = settings.connector;
|
|
} else if (settings.adapter) {
|
|
connector = settings.adapter;
|
|
}
|
|
}
|
|
|
|
// just save everything we get
|
|
this.settings = settings || {};
|
|
|
|
this.settings.debug = this.settings.debug || debug.enabled;
|
|
|
|
if(this.settings.debug) {
|
|
debug('Settings: %j', this.settings);
|
|
}
|
|
|
|
// Disconnected by default
|
|
this.connected = false;
|
|
this.connecting = false;
|
|
|
|
if (typeof connector === 'string') {
|
|
name = connector;
|
|
connector = undefined;
|
|
}
|
|
name = name || (connector && connector.name);
|
|
this.name = name;
|
|
|
|
if (name && !connector) {
|
|
if (typeof name === 'object') {
|
|
// The first argument might be the connector itself
|
|
connector = name;
|
|
this.name = connector.name;
|
|
} else {
|
|
// The connector has not been resolved
|
|
var result = DataSource._resolveConnector(name);
|
|
connector = result.connector;
|
|
if (!connector) {
|
|
console.error(result.error);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (connector) {
|
|
var postInit = function postInit(err, result) {
|
|
|
|
this._setupConnector();
|
|
// we have an connector now?
|
|
if (!this.connector) {
|
|
throw new Error('Connector is not defined correctly: it should create `connector` member of dataSource');
|
|
}
|
|
this.connected = !err; // Connected now
|
|
if (this.connected) {
|
|
this.emit('connected');
|
|
} else {
|
|
// The connection fails, let's report it and hope it will be recovered in the next call
|
|
console.error('Connection fails: ', err, '\nIt will be retried for the next request.');
|
|
this.connecting = false;
|
|
}
|
|
|
|
}.bind(this);
|
|
|
|
if ('function' === typeof connector.initialize) {
|
|
// Call the async initialize method
|
|
connector.initialize(this, postInit);
|
|
} else if ('function' === typeof connector) {
|
|
// Use the connector constructor directly
|
|
this.connector = new connector(this.settings);
|
|
postInit();
|
|
}
|
|
}
|
|
|
|
dataSource.connect = function (cb) {
|
|
var dataSource = this;
|
|
if (dataSource.connected || dataSource.connecting) {
|
|
process.nextTick(function () {
|
|
cb && cb();
|
|
});
|
|
return;
|
|
}
|
|
dataSource.connecting = true;
|
|
if (dataSource.connector.connect) {
|
|
dataSource.connector.connect(function (err, result) {
|
|
if (!err) {
|
|
dataSource.connected = true;
|
|
dataSource.connecting = false;
|
|
dataSource.emit('connected');
|
|
} else {
|
|
dataSource.connected = false;
|
|
dataSource.connecting = false;
|
|
dataSource.emit('error', err);
|
|
}
|
|
cb && cb(err, result);
|
|
});
|
|
} else {
|
|
process.nextTick(function () {
|
|
dataSource.connected = true;
|
|
dataSource.connecting = false;
|
|
dataSource.emit('connected');
|
|
cb && cb();
|
|
});
|
|
}
|
|
};
|
|
};
|
|
|
|
function isModelClass(cls) {
|
|
if (!cls) {
|
|
return false;
|
|
}
|
|
return cls.prototype instanceof ModelBaseClass;
|
|
}
|
|
|
|
DataSource.relationTypes = Object.keys(RelationDefinition.RelationTypes);
|
|
|
|
function isModelDataSourceAttached(model) {
|
|
return model && (!model.settings.unresolved) && (model.dataSource instanceof DataSource);
|
|
}
|
|
|
|
/*!
|
|
* Define scopes for the model class from the scopes object
|
|
* @param modelClass
|
|
* @param scopes
|
|
*/
|
|
DataSource.prototype.defineScopes = function (modelClass, scopes) {
|
|
if(scopes) {
|
|
for(var s in scopes) {
|
|
defineScope(modelClass, modelClass, s, scopes[s], {}, scopes[s].options);
|
|
}
|
|
}
|
|
};
|
|
|
|
/*!
|
|
* Define relations for the model class from the relations object
|
|
* @param modelClass
|
|
* @param relations
|
|
*/
|
|
DataSource.prototype.defineRelations = function (modelClass, relations) {
|
|
|
|
// Create a function for the closure in the loop
|
|
var createListener = function (name, relation, targetModel, throughModel) {
|
|
if (!isModelDataSourceAttached(targetModel)) {
|
|
targetModel.once('dataAccessConfigured', function (model) {
|
|
// Check if the through model doesn't exist or resolved
|
|
if (!throughModel || isModelDataSourceAttached(throughModel)) {
|
|
// The target model is resolved
|
|
var params = traverse(relation).clone();
|
|
params.as = name;
|
|
params.model = model;
|
|
if (throughModel) {
|
|
params.through = throughModel;
|
|
}
|
|
modelClass[relation.type].call(modelClass, name, params);
|
|
}
|
|
});
|
|
|
|
}
|
|
if (throughModel && !isModelDataSourceAttached(throughModel)) {
|
|
// Set up a listener to the through model
|
|
throughModel.once('dataAccessConfigured', function (model) {
|
|
if (isModelDataSourceAttached(targetModel)) {
|
|
// The target model is resolved
|
|
var params = traverse(relations).clone();
|
|
params.as = name;
|
|
params.model = targetModel;
|
|
params.through = model;
|
|
modelClass[relation.type].call(modelClass, name, params);
|
|
}
|
|
});
|
|
}
|
|
};
|
|
|
|
// Set up the relations
|
|
if (relations) {
|
|
for (var rn in relations) {
|
|
var r = relations[rn];
|
|
assert(DataSource.relationTypes.indexOf(r.type) !== -1, "Invalid relation type: " + r.type);
|
|
var targetModel, polymorphicName;
|
|
|
|
if (r.polymorphic && r.type !== 'belongsTo' && !r.model) {
|
|
throw new Error('No model specified for polymorphic ' + r.type + ': ' + rn);
|
|
}
|
|
|
|
if (r.polymorphic) {
|
|
polymorphicName = typeof r.model === 'string' ? r.model : rn;
|
|
if (typeof r.polymorphic === 'string') {
|
|
polymorphicName = r.polymorphic;
|
|
} else if (typeof r.polymorphic === 'object' && typeof r.polymorphic.as === 'string') {
|
|
polymorphicName = r.polymorphic.as;
|
|
}
|
|
}
|
|
|
|
if (r.model) {
|
|
targetModel = isModelClass(r.model) ? r.model : this.getModel(r.model, true);
|
|
}
|
|
|
|
var throughModel = null;
|
|
if (r.through) {
|
|
throughModel = isModelClass(r.through) ? r.through : this.getModel(r.through, true);
|
|
}
|
|
|
|
if ((targetModel && !isModelDataSourceAttached(targetModel))
|
|
|| (throughModel && !isModelDataSourceAttached(throughModel))) {
|
|
// Create a listener to defer the relation set up
|
|
createListener(rn, r, targetModel, throughModel);
|
|
} else {
|
|
// The target model is resolved
|
|
var params = traverse(r).clone();
|
|
params.as = rn;
|
|
params.model = polymorphicName || targetModel;
|
|
if (throughModel) {
|
|
params.through = throughModel;
|
|
}
|
|
modelClass[r.type].call(modelClass, rn, params);
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
/*!
|
|
* Set up the data access functions from the data source
|
|
* @param {Model} modelClass The model class
|
|
* @param {Object} settings The settings object
|
|
*/
|
|
DataSource.prototype.setupDataAccess = function (modelClass, settings) {
|
|
if (this.connector) {
|
|
// Check if the id property should be generated
|
|
var idName = modelClass.definition.idName();
|
|
var idProp = modelClass.definition.rawProperties[idName];
|
|
if(idProp && idProp.generated && this.connector.getDefaultIdType) {
|
|
// Set the default id type from connector's ability
|
|
var idType = this.connector.getDefaultIdType() || String;
|
|
idProp.type = idType;
|
|
modelClass.definition.properties[idName].type = idType;
|
|
}
|
|
if (this.connector.define) {
|
|
// pass control to connector
|
|
this.connector.define({
|
|
model: modelClass,
|
|
properties: modelClass.definition.properties,
|
|
settings: settings
|
|
});
|
|
}
|
|
}
|
|
|
|
// add data access objects
|
|
this.mixin(modelClass);
|
|
|
|
// define relations from LDL (options.relations)
|
|
var relations = settings.relationships || settings.relations;
|
|
this.defineRelations(modelClass, relations);
|
|
|
|
// Emit the dataAccessConfigured event to indicate all the methods for data
|
|
// access have been mixed into the model class
|
|
modelClass.emit('dataAccessConfigured', modelClass);
|
|
|
|
// define scopes from LDL (options.relations)
|
|
var scopes = settings.scopes || {};
|
|
this.defineScopes(modelClass, scopes);
|
|
|
|
};
|
|
|
|
/**
|
|
* Define a model class. Returns newly created model object.
|
|
* The first (String) argument specifying the model name is required.
|
|
* You can provide one or two JSON object arguments, to provide configuration options.
|
|
* See [Model definition reference](http://docs.strongloop.com/display/DOC/Model+definition+reference) for details.
|
|
*
|
|
* Simple example:
|
|
* ```
|
|
* var User = dataSource.createModel('User', {
|
|
* email: String,
|
|
* password: String,
|
|
* birthDate: Date,
|
|
* activated: Boolean
|
|
* });
|
|
* ```
|
|
* More advanced example
|
|
* ```
|
|
* var User = dataSource.createModel('User', {
|
|
* email: { type: String, limit: 150, index: true },
|
|
* password: { type: String, limit: 50 },
|
|
* birthDate: Date,
|
|
* registrationDate: {type: Date, default: function () { return new Date }},
|
|
* activated: { type: Boolean, default: false }
|
|
* });
|
|
* ```
|
|
* You can also define an ACL when you create a new data source with the `DataSource.create()` method. For example:
|
|
*
|
|
* ```js
|
|
* var Customer = ds.createModel('Customer', {
|
|
* name: {
|
|
* type: String,
|
|
* acls: [
|
|
* {principalType: ACL.USER, principalId: 'u001', accessType: ACL.WRITE, permission: ACL.DENY},
|
|
* {principalType: ACL.USER, principalId: 'u001', accessType: ACL.ALL, permission: ACL.ALLOW}
|
|
* ]
|
|
* }
|
|
* }, {
|
|
* acls: [
|
|
* {principalType: ACL.USER, principalId: 'u001', accessType: ACL.ALL, permission: ACL.ALLOW}
|
|
* ]
|
|
* });
|
|
* ```
|
|
*
|
|
* @param {String} className Name of the model to create.
|
|
* @param {Object} properties Hash of model properties in format `{property: Type, property2: Type2, ...}` or `{property: {type: Type}, property2: {type: Type2}, ...}`
|
|
* @options {Object} properties Other configuration options. This corresponds to the options key in the config object.
|
|
*
|
|
*/
|
|
|
|
DataSource.prototype.createModel = DataSource.prototype.define = function defineClass(className, properties, settings) {
|
|
var args = slice.call(arguments);
|
|
|
|
if (!className) {
|
|
throw new Error('Class name required');
|
|
}
|
|
if (args.length === 1) {
|
|
properties = {};
|
|
args.push(properties);
|
|
}
|
|
if (args.length === 2) {
|
|
settings = {};
|
|
args.push(settings);
|
|
}
|
|
|
|
properties = properties || {};
|
|
settings = settings || {};
|
|
|
|
if (this.isRelational()) {
|
|
// Set the strict mode to be true for relational DBs by default
|
|
if (settings.strict === undefined || settings.strict === null) {
|
|
settings.strict = true;
|
|
}
|
|
if (settings.strict === false) {
|
|
settings.strict = 'throw';
|
|
}
|
|
}
|
|
|
|
var modelClass = this.modelBuilder.define(className, properties, settings);
|
|
modelClass.dataSource = this;
|
|
|
|
if (settings.unresolved) {
|
|
return modelClass;
|
|
}
|
|
|
|
this.setupDataAccess(modelClass, settings);
|
|
modelClass.emit('dataSourceAttached', modelClass);
|
|
|
|
return modelClass;
|
|
};
|
|
|
|
/**
|
|
* Mixin DataAccessObject methods.
|
|
*
|
|
* @param {Function} ModelCtor The model constructor
|
|
* @private
|
|
*/
|
|
|
|
DataSource.prototype.mixin = function (ModelCtor) {
|
|
var ops = this.operations();
|
|
var DAO = this.DataAccessObject;
|
|
|
|
// mixin DAO
|
|
jutil.mixin(ModelCtor, DAO, {proxyFunctions: true, override: true});
|
|
|
|
// decorate operations as alias functions
|
|
Object.keys(ops).forEach(function (name) {
|
|
var op = ops[name];
|
|
var scope;
|
|
|
|
if (op.enabled) {
|
|
scope = op.prototype ? ModelCtor.prototype : ModelCtor;
|
|
// var sfn = scope[name] = function () {
|
|
// op.scope[op.fnName].apply(self, arguments);
|
|
// }
|
|
Object.keys(op)
|
|
.filter(function (key) {
|
|
// filter out the following keys
|
|
return ~[
|
|
'scope',
|
|
'fnName',
|
|
'prototype'
|
|
].indexOf(key);
|
|
})
|
|
.forEach(function (key) {
|
|
if (typeof op[key] !== 'undefined') {
|
|
op.scope[op.fnName][key] = op[key];
|
|
}
|
|
});
|
|
}
|
|
});
|
|
};
|
|
|
|
/**
|
|
* See ModelBuilder.getModel
|
|
*/
|
|
DataSource.prototype.getModel = function (name, forceCreate) {
|
|
return this.modelBuilder.getModel(name, forceCreate);
|
|
};
|
|
|
|
/**
|
|
* See ModelBuilder.getModelDefinition
|
|
*/
|
|
DataSource.prototype.getModelDefinition = function (name) {
|
|
return this.modelBuilder.getModelDefinition(name);
|
|
};
|
|
|
|
/**
|
|
* Get the data source types
|
|
* @returns {String[]} The data source type, such as ['db', 'nosql', 'mongodb'],
|
|
* ['rest'], or ['db', 'rdbms', 'mysql']
|
|
*/
|
|
DataSource.prototype.getTypes = function () {
|
|
var getTypes = this.connector && this.connector.getTypes;
|
|
var types = getTypes && getTypes() || [];
|
|
if (typeof types === 'string') {
|
|
types = types.split(/[\s,\/]+/);
|
|
}
|
|
return types;
|
|
};
|
|
|
|
/**
|
|
* Check the data source supports the specified types.
|
|
* @param {String} types Type name or an array of type names. Can also be array of Strings.
|
|
* @returns {Boolean} true if all types are supported by the data source
|
|
*/
|
|
DataSource.prototype.supportTypes = function (types) {
|
|
var supportedTypes = this.getTypes();
|
|
if (Array.isArray(types)) {
|
|
// Check each of the types
|
|
for (var i = 0; i < types.length; i++) {
|
|
if (supportedTypes.indexOf(types[i]) === -1) {
|
|
// Not supported
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
} else {
|
|
// The types is a string
|
|
return supportedTypes.indexOf(types) !== -1;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Attach an existing model to a data source.
|
|
*
|
|
* @param {Function} modelClass The model constructor
|
|
*/
|
|
|
|
DataSource.prototype.attach = function (modelClass) {
|
|
if (modelClass.dataSource === this) {
|
|
// Already attached to the data source
|
|
return modelClass;
|
|
}
|
|
|
|
if (modelClass.modelBuilder !== this.modelBuilder) {
|
|
this.modelBuilder.definitions[modelClass.modelName] = modelClass.definition;
|
|
this.modelBuilder.models[modelClass.modelName] = modelClass;
|
|
// reset the modelBuilder
|
|
modelClass.modelBuilder = this.modelBuilder;
|
|
}
|
|
|
|
// redefine the dataSource
|
|
modelClass.dataSource = this;
|
|
|
|
this.setupDataAccess(modelClass, modelClass.settings);
|
|
modelClass.emit('dataSourceAttached', modelClass);
|
|
return modelClass;
|
|
|
|
};
|
|
|
|
/**
|
|
* Define single property named `prop` on `model`
|
|
*
|
|
* @param {String} model Name of model
|
|
* @param {String} prop Name of property
|
|
* @param {Object} params Property settings
|
|
*/
|
|
DataSource.prototype.defineProperty = function (model, prop, params) {
|
|
this.modelBuilder.defineProperty(model, prop, params);
|
|
|
|
var resolvedProp = this.getModelDefinition(model).properties[prop];
|
|
if (this.connector && this.connector.defineProperty) {
|
|
this.connector.defineProperty(model, prop, resolvedProp);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Drop each model table and re-create.
|
|
* This method applies only to database connectors. For MongoDB, it drops and creates indexes.
|
|
*
|
|
* **WARNING**: Calling this function deletes all data! Use `autoupdate()` to preserve data.
|
|
*
|
|
* @param {String} model Model to migrate. If not present, apply to all models. Can also be an array of Strings.
|
|
* @param {Function} [callback] Callback function. Optional.
|
|
*
|
|
|
|
*/
|
|
DataSource.prototype.automigrate = function (models, cb) {
|
|
this.freeze();
|
|
if (this.connector.automigrate) {
|
|
this.connector.automigrate(models, cb);
|
|
} else {
|
|
if ((!cb) && ('function' === typeof models)) {
|
|
cb = models;
|
|
models = undefined;
|
|
}
|
|
cb && process.nextTick(cb);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Update existing database tables.
|
|
* This method applies only to database connectors.
|
|
*
|
|
* @param {String} model Model to migrate. If not present, apply to all models. Can also be an array of Strings.
|
|
* @param {Function} [cb] The callback function
|
|
*/
|
|
DataSource.prototype.autoupdate = function (models, cb) {
|
|
this.freeze();
|
|
if (this.connector.autoupdate) {
|
|
this.connector.autoupdate(models, cb);
|
|
} else {
|
|
if ((!cb) && ('function' === typeof models)) {
|
|
cb = models;
|
|
models = undefined;
|
|
}
|
|
cb && process.nextTick(cb);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Discover existing database tables.
|
|
* This method returns an array of model objects, including {type, name, onwer}
|
|
*
|
|
* @param {Object} options The options
|
|
* @param {Function} Callback function. Optional.
|
|
* @options {Object} options Discovery options. See below.
|
|
* @property {Boolean} all If true, discover all models; if false, discover only models owned by the current user.
|
|
* @property {Boolean} views If true, nclude views; if false, only tables.
|
|
* @property {Number} limit Page size
|
|
* @property {Number} offset Starting index
|
|
*
|
|
*/
|
|
DataSource.prototype.discoverModelDefinitions = function (options, cb) {
|
|
this.freeze();
|
|
if (this.connector.discoverModelDefinitions) {
|
|
this.connector.discoverModelDefinitions(options, cb);
|
|
} else if (cb) {
|
|
process.nextTick(cb);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* The synchronous version of discoverModelDefinitions.
|
|
* @options {Object} options The options
|
|
* @property {Boolean} all If true, discover all models; if false, discover only models owned by the current user.
|
|
* @property {Boolean} views If true, nclude views; if false, only tables.
|
|
* @property {Number} limit Page size
|
|
* @property {Number} offset Starting index
|
|
* @returns {*}
|
|
*/
|
|
DataSource.prototype.discoverModelDefinitionsSync = function (options) {
|
|
this.freeze();
|
|
if (this.connector.discoverModelDefinitionsSync) {
|
|
return this.connector.discoverModelDefinitionsSync(options);
|
|
}
|
|
return null;
|
|
};
|
|
|
|
/**
|
|
* Discover properties for a given model.
|
|
*
|
|
* Callback function return value is an object that can have the following properties:
|
|
*
|
|
*| Key | Type | Description |
|
|
*|-----|------|-------------|
|
|
*|owner | String | Database owner or schema|
|
|
*|tableName | String | Table/view name|
|
|
*|columnName | String | Column name|
|
|
*|dataType | String | Data type|
|
|
*|dataLength | Number | Data length|
|
|
*|dataPrecision | Number | Numeric data precision|
|
|
*|dataScale |Number | Numeric data scale|
|
|
*|nullable |Boolean | If true, then the data can be null|
|
|
*
|
|
* @param {String} modelName The table/view name
|
|
* @options {Object} options The options
|
|
* @property {String} owner|schema The database owner or schema
|
|
* @param {Function} cb Callback function. Optional
|
|
*
|
|
*/
|
|
DataSource.prototype.discoverModelProperties = function (modelName, options, cb) {
|
|
this.freeze();
|
|
if (this.connector.discoverModelProperties) {
|
|
this.connector.discoverModelProperties(modelName, options, cb);
|
|
} else if (cb) {
|
|
process.nextTick(cb);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* The synchronous version of discoverModelProperties
|
|
* @param {String} modelName The table/view name
|
|
* @param {Object} options The options
|
|
* @returns {*}
|
|
*/
|
|
DataSource.prototype.discoverModelPropertiesSync = function (modelName, options) {
|
|
this.freeze();
|
|
if (this.connector.discoverModelPropertiesSync) {
|
|
return this.connector.discoverModelPropertiesSync(modelName, options);
|
|
}
|
|
return null;
|
|
};
|
|
|
|
/**
|
|
* Discover primary keys for a given owner/modelName.
|
|
* Callback function return value is an object that can have the following properties:
|
|
*
|
|
*| Key | Type | Description |
|
|
*|-----|------|-------------|
|
|
*| owner |String | Table schema or owner (may be null). Owner defaults to current user.
|
|
*| tableName |String| Table name
|
|
*| columnName |String| Column name
|
|
*| keySeq |Number| Sequence number within primary key (1 indicates the first column in the primary key; 2 indicates the second column in the primary key).
|
|
*| pkName |String| Primary key name (may be null)
|
|
*
|
|
* @param {String} modelName The model name
|
|
* @options {Object} options The options
|
|
* @property {String} owner|schema The database owner or schema
|
|
* @param {Function} [cb] The callback function
|
|
*/
|
|
DataSource.prototype.discoverPrimaryKeys = function (modelName, options, cb) {
|
|
this.freeze();
|
|
if (this.connector.discoverPrimaryKeys) {
|
|
this.connector.discoverPrimaryKeys(modelName, options, cb);
|
|
} else if (cb) {
|
|
process.nextTick(cb);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* The synchronous version of discoverPrimaryKeys
|
|
* @param {String} modelName The model name
|
|
* @options {Object} options The options
|
|
* @property {String} owner|schema The database owner orschema
|
|
* @returns {*}
|
|
*/
|
|
DataSource.prototype.discoverPrimaryKeysSync = function (modelName, options) {
|
|
this.freeze();
|
|
if (this.connector.discoverPrimaryKeysSync) {
|
|
return this.connector.discoverPrimaryKeysSync(modelName, options);
|
|
}
|
|
return null;
|
|
};
|
|
|
|
/**
|
|
* Discover foreign keys for a given owner/modelName
|
|
*
|
|
* Callback function return value is an object that can have the following properties:
|
|
*
|
|
*| Key | Type | Description |
|
|
*|-----|------|-------------|
|
|
*|fkOwner |String | Foreign key table schema (may be null)
|
|
*|fkName |String | Foreign key name (may be null)
|
|
*|fkTableName |String | Foreign key table name
|
|
*|fkColumnName |String | Foreign key column name
|
|
*|keySeq |Number | Sequence number within a foreign key( a value of 1 represents the first column of the foreign key, a value of 2 would represent the second column within the foreign key).
|
|
*|pkOwner |String | Primary key table schema being imported (may be null)
|
|
*|pkName |String | Primary key name (may be null)
|
|
*|pkTableName |String | Primary key table name being imported
|
|
*|pkColumnName |String | Primary key column name being imported
|
|
*
|
|
* @param {String} modelName The model name
|
|
* @options {Object} options The options
|
|
* @property {String} owner|schema The database owner or schema
|
|
* @param {Function} [cb] The callback function
|
|
*
|
|
*/
|
|
DataSource.prototype.discoverForeignKeys = function (modelName, options, cb) {
|
|
this.freeze();
|
|
if (this.connector.discoverForeignKeys) {
|
|
this.connector.discoverForeignKeys(modelName, options, cb);
|
|
} else if (cb) {
|
|
process.nextTick(cb);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* The synchronous version of discoverForeignKeys
|
|
*
|
|
* @param {String} modelName The model name
|
|
* @param {Object} options The options
|
|
* @returns {*}
|
|
*/
|
|
DataSource.prototype.discoverForeignKeysSync = function (modelName, options) {
|
|
this.freeze();
|
|
if (this.connector.discoverForeignKeysSync) {
|
|
return this.connector.discoverForeignKeysSync(modelName, options);
|
|
}
|
|
return null;
|
|
};
|
|
|
|
/**
|
|
* Retrieves a description of the foreign key columns that reference the given table's primary key columns
|
|
* (the foreign keys exported by a table), ordered by fkTableOwner, fkTableName, and keySeq.
|
|
*
|
|
* Callback function return value is an object that can have the following properties:
|
|
*
|
|
*| Key | Type | Description |
|
|
*|-----|------|-------------|
|
|
*|fkOwner |String | Foreign key table schema (may be null)
|
|
*|fkName |String | Foreign key name (may be null)
|
|
*|fkTableName |String | Foreign key table name
|
|
*|fkColumnName |String | Foreign key column name
|
|
*|keySeq |Number | Sequence number within a foreign key( a value of 1 represents the first column of the foreign key, a value of 2 would represent the second column within the foreign key).
|
|
*|pkOwner |String | Primary key table schema being imported (may be null)
|
|
*|pkName |String | Primary key name (may be null)
|
|
*|pkTableName |String | Primary key table name being imported
|
|
*|pkColumnName |String | Primary key column name being imported
|
|
*
|
|
* @param {String} modelName The model name
|
|
* @options {Object} options The options
|
|
* @property {String} owner|schema The database owner or schema
|
|
* @param {Function} [cb] The callback function
|
|
*/
|
|
DataSource.prototype.discoverExportedForeignKeys = function (modelName, options, cb) {
|
|
this.freeze();
|
|
if (this.connector.discoverExportedForeignKeys) {
|
|
this.connector.discoverExportedForeignKeys(modelName, options, cb);
|
|
} else if (cb) {
|
|
process.nextTick(cb);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* The synchronous version of discoverExportedForeignKeys
|
|
* @param {String} modelName The model name
|
|
* @param {Object} options The options
|
|
* @returns {*}
|
|
*/
|
|
DataSource.prototype.discoverExportedForeignKeysSync = function (modelName, options) {
|
|
this.freeze();
|
|
if (this.connector.discoverExportedForeignKeysSync) {
|
|
return this.connector.discoverExportedForeignKeysSync(modelName, options);
|
|
}
|
|
return null;
|
|
};
|
|
|
|
function capitalize(str) {
|
|
if (!str) {
|
|
return str;
|
|
}
|
|
return str.charAt(0).toUpperCase() + ((str.length > 1) ? str.slice(1).toLowerCase() : '');
|
|
}
|
|
|
|
function fromDBName(dbName, camelCase) {
|
|
if (!dbName) {
|
|
return dbName;
|
|
}
|
|
var parts = dbName.split(/-|_/);
|
|
parts[0] = camelCase ? parts[0].toLowerCase() : capitalize(parts[0]);
|
|
|
|
for (var i = 1; i < parts.length; i++) {
|
|
parts[i] = capitalize(parts[i]);
|
|
}
|
|
return parts.join('');
|
|
}
|
|
|
|
/**
|
|
* Discover one schema from the given model without following the relations.
|
|
**Example schema from oracle connector:**
|
|
*
|
|
* ```js
|
|
* {
|
|
* "name": "Product",
|
|
* "options": {
|
|
* "idInjection": false,
|
|
* "oracle": {
|
|
* "schema": "BLACKPOOL",
|
|
* "table": "PRODUCT"
|
|
* }
|
|
* },
|
|
* "properties": {
|
|
* "id": {
|
|
* "type": "String",
|
|
* "required": true,
|
|
* "length": 20,
|
|
* "id": 1,
|
|
* "oracle": {
|
|
* "columnName": "ID",
|
|
* "dataType": "VARCHAR2",
|
|
* "dataLength": 20,
|
|
* "nullable": "N"
|
|
* }
|
|
* },
|
|
* "name": {
|
|
* "type": "String",
|
|
* "required": false,
|
|
* "length": 64,
|
|
* "oracle": {
|
|
* "columnName": "NAME",
|
|
* "dataType": "VARCHAR2",
|
|
* "dataLength": 64,
|
|
* "nullable": "Y"
|
|
* }
|
|
* },
|
|
* ...
|
|
* "fireModes": {
|
|
* "type": "String",
|
|
* "required": false,
|
|
* "length": 64,
|
|
* "oracle": {
|
|
* "columnName": "FIRE_MODES",
|
|
* "dataType": "VARCHAR2",
|
|
* "dataLength": 64,
|
|
* "nullable": "Y"
|
|
* }
|
|
* }
|
|
* }
|
|
* }
|
|
* ```
|
|
*
|
|
* @param {String} modelName The model name
|
|
* @param {Object} [options] The options
|
|
* @param {Function} [cb] The callback function
|
|
*/
|
|
DataSource.prototype.discoverSchema = function (modelName, options, cb) {
|
|
options = options || {};
|
|
|
|
if (!cb && 'function' === typeof options) {
|
|
cb = options;
|
|
options = {};
|
|
}
|
|
options.visited = {};
|
|
options.relations = false;
|
|
|
|
this.discoverSchemas(modelName, options, function (err, schemas) {
|
|
if (err) {
|
|
cb && cb(err, schemas);
|
|
return;
|
|
}
|
|
for (var s in schemas) {
|
|
cb && cb(null, schemas[s]);
|
|
return;
|
|
}
|
|
});
|
|
};
|
|
|
|
/**
|
|
* Discover schema from a given modelName/view.
|
|
*
|
|
* @param {String} modelName The model name.
|
|
* @options {Object} [options] Options; see below.
|
|
* @property {String} owner|schema Database owner or schema name.
|
|
* @property {Boolean} relations True if relations (primary key/foreign key) are navigated; false otherwise.
|
|
* @property {Boolean} all True if all owners are included; false otherwise.
|
|
* @property {Boolean} views True if views are included; false otherwise.
|
|
* @param {Function} [cb] The callback function
|
|
*/
|
|
DataSource.prototype.discoverSchemas = function (modelName, options, cb) {
|
|
options = options || {};
|
|
|
|
if (!cb && 'function' === typeof options) {
|
|
cb = options;
|
|
options = {};
|
|
}
|
|
|
|
var self = this;
|
|
var schemaName = this.connector.name || this.name;
|
|
|
|
var tasks = [
|
|
this.discoverModelProperties.bind(this, modelName, options),
|
|
this.discoverPrimaryKeys.bind(this, modelName, options) ];
|
|
|
|
var followingRelations = options.associations || options.relations;
|
|
if (followingRelations) {
|
|
tasks.push(this.discoverForeignKeys.bind(this, modelName, options));
|
|
}
|
|
|
|
async.parallel(tasks, function (err, results) {
|
|
|
|
if (err) {
|
|
cb && cb(err);
|
|
return;
|
|
}
|
|
|
|
var columns = results[0];
|
|
if (!columns || columns.length === 0) {
|
|
cb && cb();
|
|
return;
|
|
}
|
|
|
|
// Handle primary keys
|
|
var primaryKeys = results[1];
|
|
var pks = {};
|
|
primaryKeys.forEach(function (pk) {
|
|
pks[pk.columnName] = pk.keySeq;
|
|
});
|
|
|
|
if (self.settings.debug) {
|
|
debug('Primary keys: ', pks);
|
|
}
|
|
|
|
var schema = {
|
|
name: fromDBName(modelName, false),
|
|
options: {
|
|
idInjection: false // DO NOT add id property
|
|
},
|
|
properties: {
|
|
}
|
|
};
|
|
|
|
schema.options[schemaName] = {
|
|
schema: columns[0].owner,
|
|
table: modelName
|
|
};
|
|
|
|
columns.forEach(function (item) {
|
|
var i = item;
|
|
|
|
var propName = fromDBName(item.columnName, true);
|
|
schema.properties[propName] = {
|
|
type: item.type,
|
|
required: (item.nullable === 'N'),
|
|
length: item.dataLength,
|
|
precision: item.dataPrecision,
|
|
scale: item.dataScale
|
|
};
|
|
|
|
if (pks[item.columnName]) {
|
|
schema.properties[propName].id = pks[item.columnName];
|
|
}
|
|
schema.properties[propName][schemaName] = {
|
|
columnName: i.columnName,
|
|
dataType: i.dataType,
|
|
dataLength: i.dataLength,
|
|
dataPrecision: item.dataPrecision,
|
|
dataScale: item.dataScale,
|
|
nullable: i.nullable
|
|
};
|
|
});
|
|
|
|
// Add current modelName to the visited tables
|
|
options.visited = options.visited || {};
|
|
var schemaKey = columns[0].owner + '.' + modelName;
|
|
if (!options.visited.hasOwnProperty(schemaKey)) {
|
|
if (self.settings.debug) {
|
|
debug('Adding schema for ' + schemaKey);
|
|
}
|
|
options.visited[schemaKey] = schema;
|
|
}
|
|
|
|
var otherTables = {};
|
|
if (followingRelations) {
|
|
// Handle foreign keys
|
|
var fks = {};
|
|
var foreignKeys = results[2];
|
|
foreignKeys.forEach(function (fk) {
|
|
var fkInfo = {
|
|
keySeq: fk.keySeq,
|
|
owner: fk.pkOwner,
|
|
tableName: fk.pkTableName,
|
|
columnName: fk.pkColumnName
|
|
};
|
|
if (fks[fk.fkName]) {
|
|
fks[fk.fkName].push(fkInfo);
|
|
} else {
|
|
fks[fk.fkName] = [fkInfo];
|
|
}
|
|
});
|
|
|
|
if (self.settings.debug) {
|
|
debug('Foreign keys: ', fks);
|
|
}
|
|
|
|
schema.options.relations = {};
|
|
foreignKeys.forEach(function (fk) {
|
|
var propName = fromDBName(fk.pkTableName, true);
|
|
schema.options.relations[propName] = {
|
|
model: fromDBName(fk.pkTableName, false),
|
|
type: 'belongsTo',
|
|
foreignKey: fromDBName(fk.fkColumnName, true)
|
|
};
|
|
|
|
var key = fk.pkOwner + '.' + fk.pkTableName;
|
|
if (!options.visited.hasOwnProperty(key) && !otherTables.hasOwnProperty(key)) {
|
|
otherTables[key] = {owner: fk.pkOwner, tableName: fk.pkTableName};
|
|
}
|
|
});
|
|
}
|
|
|
|
if (Object.keys(otherTables).length === 0) {
|
|
cb && cb(null, options.visited);
|
|
} else {
|
|
var moreTasks = [];
|
|
for (var t in otherTables) {
|
|
if (self.settings.debug) {
|
|
debug('Discovering related schema for ' + schemaKey);
|
|
}
|
|
var newOptions = {};
|
|
for (var key in options) {
|
|
newOptions[key] = options[key];
|
|
}
|
|
newOptions.owner = otherTables[t].owner;
|
|
|
|
moreTasks.push(DataSource.prototype.discoverSchemas.bind(self, otherTables[t].tableName, newOptions));
|
|
}
|
|
async.parallel(moreTasks, function (err, results) {
|
|
var result = results && results[0];
|
|
cb && cb(err, result);
|
|
});
|
|
}
|
|
});
|
|
};
|
|
|
|
/**
|
|
* Discover schema from a given table/view synchronously
|
|
*
|
|
* @param {String} modelName The model name
|
|
* @options {Object} [options] Options; see below.
|
|
* @property {String} owner|schema Database owner or schema name.
|
|
* @property {Boolean} relations True if relations (primary key/foreign key) are navigated; false otherwise.
|
|
* @property {Boolean} all True if all owners are included; false otherwise.
|
|
* @property {Boolean} views True if views are included; false otherwise.
|
|
*/
|
|
DataSource.prototype.discoverSchemasSync = function (modelName, options) {
|
|
var self = this;
|
|
var schemaName = this.name || this.connector.name;
|
|
|
|
var columns = this.discoverModelPropertiesSync(modelName, options);
|
|
if (!columns || columns.length === 0) {
|
|
return [];
|
|
}
|
|
|
|
// Handle primary keys
|
|
var primaryKeys = this.discoverPrimaryKeysSync(modelName, options);
|
|
var pks = {};
|
|
primaryKeys.forEach(function (pk) {
|
|
pks[pk.columnName] = pk.keySeq;
|
|
});
|
|
|
|
if (self.settings.debug) {
|
|
debug('Primary keys: ', pks);
|
|
}
|
|
|
|
var schema = {
|
|
name: fromDBName(modelName, false),
|
|
options: {
|
|
idInjection: false // DO NOT add id property
|
|
},
|
|
properties: {
|
|
}
|
|
};
|
|
|
|
schema.options[schemaName] = {
|
|
schema: columns.length > 0 && columns[0].owner,
|
|
table: modelName
|
|
};
|
|
|
|
columns.forEach(function (item) {
|
|
var i = item;
|
|
|
|
var propName = fromDBName(item.columnName, true);
|
|
schema.properties[propName] = {
|
|
type: item.type,
|
|
required: (item.nullable === 'N'),
|
|
length: item.dataLength,
|
|
precision: item.dataPrecision,
|
|
scale: item.dataScale
|
|
};
|
|
|
|
if (pks[item.columnName]) {
|
|
schema.properties[propName].id = pks[item.columnName];
|
|
}
|
|
schema.properties[propName][schemaName] = {
|
|
columnName: i.columnName,
|
|
dataType: i.dataType,
|
|
dataLength: i.dataLength,
|
|
dataPrecision: item.dataPrecision,
|
|
dataScale: item.dataScale,
|
|
nullable: i.nullable
|
|
};
|
|
});
|
|
|
|
// Add current modelName to the visited tables
|
|
options.visited = options.visited || {};
|
|
var schemaKey = columns[0].owner + '.' + modelName;
|
|
if (!options.visited.hasOwnProperty(schemaKey)) {
|
|
if (self.settings.debug) {
|
|
debug('Adding schema for ' + schemaKey);
|
|
}
|
|
options.visited[schemaKey] = schema;
|
|
}
|
|
|
|
var otherTables = {};
|
|
var followingRelations = options.associations || options.relations;
|
|
if (followingRelations) {
|
|
// Handle foreign keys
|
|
var fks = {};
|
|
var foreignKeys = this.discoverForeignKeysSync(modelName, options);
|
|
foreignKeys.forEach(function (fk) {
|
|
var fkInfo = {
|
|
keySeq: fk.keySeq,
|
|
owner: fk.pkOwner,
|
|
tableName: fk.pkTableName,
|
|
columnName: fk.pkColumnName
|
|
};
|
|
if (fks[fk.fkName]) {
|
|
fks[fk.fkName].push(fkInfo);
|
|
} else {
|
|
fks[fk.fkName] = [fkInfo];
|
|
}
|
|
});
|
|
|
|
if (self.settings.debug) {
|
|
debug('Foreign keys: ', fks);
|
|
}
|
|
|
|
schema.options.relations = {};
|
|
foreignKeys.forEach(function (fk) {
|
|
var propName = fromDBName(fk.pkTableName, true);
|
|
schema.options.relations[propName] = {
|
|
model: fromDBName(fk.pkTableName, false),
|
|
type: 'belongsTo',
|
|
foreignKey: fromDBName(fk.fkColumnName, true)
|
|
};
|
|
|
|
var key = fk.pkOwner + '.' + fk.pkTableName;
|
|
if (!options.visited.hasOwnProperty(key) && !otherTables.hasOwnProperty(key)) {
|
|
otherTables[key] = {owner: fk.pkOwner, tableName: fk.pkTableName};
|
|
}
|
|
});
|
|
}
|
|
|
|
if (Object.keys(otherTables).length === 0) {
|
|
return options.visited;
|
|
} else {
|
|
var moreTasks = [];
|
|
for (var t in otherTables) {
|
|
if (self.settings.debug) {
|
|
debug('Discovering related schema for ' + schemaKey);
|
|
}
|
|
var newOptions = {};
|
|
for (var key in options) {
|
|
newOptions[key] = options[key];
|
|
}
|
|
newOptions.owner = otherTables[t].owner;
|
|
self.discoverSchemasSync(otherTables[t].tableName, newOptions);
|
|
}
|
|
return options.visited;
|
|
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Discover and build models from the specified owner/modelName.
|
|
*
|
|
* @param {String} modelName The model name.
|
|
* @options {Object} [options] Options; see below.
|
|
* @property {String} owner|schema Database owner or schema name.
|
|
* @property {Boolean} relations True if relations (primary key/foreign key) are navigated; false otherwise.
|
|
* @property {Boolean} all True if all owners are included; false otherwise.
|
|
* @property {Boolean} views True if views are included; false otherwise.
|
|
* @param {Function} [cb] The callback function
|
|
*/
|
|
DataSource.prototype.discoverAndBuildModels = function (modelName, options, cb) {
|
|
var self = this;
|
|
this.discoverSchemas(modelName, options, function (err, schemas) {
|
|
if (err) {
|
|
cb && cb(err, schemas);
|
|
return;
|
|
}
|
|
|
|
var schemaList = [];
|
|
for (var s in schemas) {
|
|
var schema = schemas[s];
|
|
schemaList.push(schema);
|
|
}
|
|
|
|
var models = self.modelBuilder.buildModels(schemaList);
|
|
// Now attach the models to the data source
|
|
for (var m in models) {
|
|
models[m].attachTo(self);
|
|
}
|
|
cb && cb(err, models);
|
|
});
|
|
};
|
|
|
|
/**
|
|
* Discover and build models from the given owner/modelName synchronously.
|
|
*
|
|
* @param {String} modelName The model name.
|
|
* @options {Object} [options] Options; see below.
|
|
* @property {String} owner|schema Database owner or schema name.
|
|
* @property {Boolean} relations True if relations (primary key/foreign key) are navigated; false otherwise.
|
|
* @property {Boolean} all True if all owners are included; false otherwise.
|
|
* @property {Boolean} views True if views are included; false otherwise.
|
|
|
|
* @param {String} modelName The model name
|
|
* @param {Object} [options] The options
|
|
*/
|
|
DataSource.prototype.discoverAndBuildModelsSync = function (modelName, options) {
|
|
var schemas = this.discoverSchemasSync(modelName, options);
|
|
|
|
var schemaList = [];
|
|
for (var s in schemas) {
|
|
var schema = schemas[s];
|
|
schemaList.push(schema);
|
|
}
|
|
|
|
var models = this.modelBuilder.buildModels(schemaList);
|
|
return models;
|
|
};
|
|
|
|
/**
|
|
* Check whether migrations needed
|
|
* This method applies only to SQL connectors.
|
|
* @param {String|String[]} [models] A model name or an array of model names. If not present, apply to all models.
|
|
*/
|
|
DataSource.prototype.isActual = function (models, cb) {
|
|
this.freeze();
|
|
if (this.connector.isActual) {
|
|
this.connector.isActual(models, cb);
|
|
} else {
|
|
if ((!cb) && ('function' === typeof models)) {
|
|
cb = models;
|
|
models = undefined;
|
|
}
|
|
if (cb) {
|
|
process.nextTick(function () {
|
|
cb(null, true);
|
|
});
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Log benchmarked message. Do not redefine this method, if you need to grab
|
|
* chema logs, use `dataSource.on('log', ...)` emitter event
|
|
*
|
|
* @private used by connectors
|
|
*/
|
|
DataSource.prototype.log = function (sql, t) {
|
|
debug(sql, t);
|
|
this.emit('log', sql, t);
|
|
};
|
|
|
|
/**
|
|
* Freeze dataSource. Behavior depends on connector
|
|
*/
|
|
DataSource.prototype.freeze = function freeze() {
|
|
if(!this.connector) {
|
|
throw new Error('The connector has not been initialized.');
|
|
}
|
|
if (this.connector.freezeDataSource) {
|
|
this.connector.freezeDataSource();
|
|
}
|
|
if (this.connector.freezeSchema) {
|
|
this.connector.freezeSchema();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Return table name for specified `modelName`
|
|
* @param {String} modelName The model name
|
|
*/
|
|
DataSource.prototype.tableName = function (modelName) {
|
|
return this.getModelDefinition(modelName).tableName(this.connector.name);
|
|
};
|
|
|
|
/**
|
|
* Return column name for specified modelName and propertyName
|
|
* @param {String} modelName The model name
|
|
* @param {String} propertyName The property name
|
|
* @returns {String} columnName The column name.
|
|
*/
|
|
DataSource.prototype.columnName = function (modelName, propertyName) {
|
|
return this.getModelDefinition(modelName).columnName(this.connector.name, propertyName);
|
|
};
|
|
|
|
/**
|
|
* Return column metadata for specified modelName and propertyName
|
|
* @param {String} modelName The model name
|
|
* @param {String} propertyName The property name
|
|
* @returns {Object} column metadata
|
|
*/
|
|
DataSource.prototype.columnMetadata = function (modelName, propertyName) {
|
|
return this.getModelDefinition(modelName).columnMetadata(this.connector.name, propertyName);
|
|
};
|
|
|
|
/**
|
|
* Return column names for specified modelName
|
|
* @param {String} modelName The model name
|
|
* @returns {String[]} column names
|
|
*/
|
|
DataSource.prototype.columnNames = function (modelName) {
|
|
return this.getModelDefinition(modelName).columnNames(this.connector.name);
|
|
};
|
|
|
|
/**
|
|
* Find the ID column name
|
|
* @param {String} modelName The model name
|
|
* @returns {String} columnName for ID
|
|
*/
|
|
DataSource.prototype.idColumnName = function (modelName) {
|
|
return this.getModelDefinition(modelName).idColumnName(this.connector.name);
|
|
};
|
|
|
|
/**
|
|
* Find the ID property name
|
|
* @param {String} modelName The model name
|
|
* @returns {String} property name for ID
|
|
*/
|
|
DataSource.prototype.idName = function (modelName) {
|
|
if (!this.getModelDefinition(modelName).idName) {
|
|
console.error('No id name', this.getModelDefinition(modelName));
|
|
}
|
|
return this.getModelDefinition(modelName).idName();
|
|
};
|
|
|
|
/**
|
|
* Find the ID property names sorted by the index
|
|
* @param {String} modelName The model name
|
|
* @returns {String[]} property names for IDs
|
|
*/
|
|
DataSource.prototype.idNames = function (modelName) {
|
|
return this.getModelDefinition(modelName).idNames();
|
|
};
|
|
|
|
/**
|
|
* Find the id property definition
|
|
* @param {String} modelName The model name
|
|
* @returns {Object} The id property definition
|
|
*/
|
|
DataSource.prototype.idProperty = function (modelName) {
|
|
var def = this.getModelDefinition(modelName);
|
|
var idProps = def && def.ids();
|
|
return idProps && idProps[0] && idProps[0].property;
|
|
};
|
|
|
|
/**
|
|
* Define foreign key to another model
|
|
* @param {String} className The model name that owns the key
|
|
* @param {String} key Name of key field
|
|
* @param {String} foreignClassName The foreign model name
|
|
*/
|
|
DataSource.prototype.defineForeignKey = function defineForeignKey(className, key, foreignClassName) {
|
|
var pkType = null;
|
|
var foreignModel = this.getModelDefinition(foreignClassName);
|
|
var pkName = foreignModel && foreignModel.idName();
|
|
if (pkName) {
|
|
pkType = foreignModel.properties[pkName].type;
|
|
}
|
|
var model = this.getModelDefinition(className);
|
|
if (model.properties[key]) {
|
|
if (pkType) {
|
|
// Reset the type of the foreign key
|
|
model.rawProperties[key].type = model.properties[key].type = pkType;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (this.connector.defineForeignKey) {
|
|
var cb = function (err, keyType) {
|
|
if (err) throw err;
|
|
// Add the foreign key property to the data source _models
|
|
this.defineProperty(className, key, {type: keyType || pkType});
|
|
}.bind(this);
|
|
switch (this.connector.defineForeignKey.length) {
|
|
case 4:
|
|
this.connector.defineForeignKey(className, key, foreignClassName, cb);
|
|
break;
|
|
default:
|
|
case 3:
|
|
this.connector.defineForeignKey(className, key, cb);
|
|
break;
|
|
}
|
|
} else {
|
|
// Add the foreign key property to the data source _models
|
|
this.defineProperty(className, key, {type: pkType});
|
|
}
|
|
|
|
};
|
|
|
|
/**
|
|
* Close database connection
|
|
* @param {Function} [cb] The callback function. Optional.
|
|
*/
|
|
DataSource.prototype.disconnect = function disconnect(cb) {
|
|
var self = this;
|
|
if (this.connected && (typeof this.connector.disconnect === 'function')) {
|
|
this.connector.disconnect(function (err, result) {
|
|
self.connected = false;
|
|
cb && cb(err, result);
|
|
});
|
|
} else {
|
|
process.nextTick(function () {
|
|
cb && cb();
|
|
});
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Copy the model from Master.
|
|
* @param {Function} Master The model constructor
|
|
* @returns {Function} The copy of the model constructor
|
|
*
|
|
* @private
|
|
*/
|
|
DataSource.prototype.copyModel = function copyModel(Master) {
|
|
var dataSource = this;
|
|
var className = Master.modelName;
|
|
var md = Master.modelBuilder.getModelDefinition(className);
|
|
var Slave = function SlaveModel() {
|
|
Master.apply(this, [].slice.call(arguments));
|
|
};
|
|
|
|
util.inherits(Slave, Master);
|
|
|
|
// Delegating static properties
|
|
Slave.__proto__ = Master;
|
|
|
|
hiddenProperty(Slave, 'dataSource', dataSource);
|
|
hiddenProperty(Slave, 'modelName', className);
|
|
hiddenProperty(Slave, 'relations', Master.relations);
|
|
|
|
if (!(className in dataSource.modelBuilder.models)) {
|
|
|
|
// store class in model pool
|
|
dataSource.modelBuilder.models[className] = Slave;
|
|
dataSource.modelBuilder.definitions[className] = new ModelDefinition(dataSource.modelBuilder, md.name, md.properties, md.settings);
|
|
|
|
if ((!dataSource.isTransaction) && dataSource.connector && dataSource.connector.define) {
|
|
dataSource.connector.define({
|
|
model: Slave,
|
|
properties: md.properties,
|
|
settings: md.settings
|
|
});
|
|
}
|
|
|
|
}
|
|
|
|
return Slave;
|
|
};
|
|
|
|
/**
|
|
*
|
|
* @returns {EventEmitter}
|
|
* @private
|
|
*/
|
|
DataSource.prototype.transaction = function () {
|
|
var dataSource = this;
|
|
var transaction = new EventEmitter();
|
|
|
|
for (var p in dataSource) {
|
|
transaction[p] = dataSource[p];
|
|
}
|
|
|
|
transaction.isTransaction = true;
|
|
transaction.origin = dataSource;
|
|
transaction.name = dataSource.name;
|
|
transaction.settings = dataSource.settings;
|
|
transaction.connected = false;
|
|
transaction.connecting = false;
|
|
transaction.connector = dataSource.connector.transaction();
|
|
|
|
// create blank models pool
|
|
transaction.modelBuilder = new ModelBuilder();
|
|
transaction.models = transaction.modelBuilder.models;
|
|
transaction.definitions = transaction.modelBuilder.definitions;
|
|
|
|
for (var i in dataSource.modelBuilder.models) {
|
|
dataSource.copyModel.call(transaction, dataSource.modelBuilder.models[i]);
|
|
}
|
|
|
|
transaction.exec = function (cb) {
|
|
transaction.connector.exec(cb);
|
|
};
|
|
|
|
return transaction;
|
|
};
|
|
|
|
/**
|
|
* Enable remote access to a data source operation. Each [connector](#connector) has its own set of set
|
|
* remotely enabled and disabled operations. To list the operations, call `dataSource.operations()`.
|
|
* @param {String} operation The operation name
|
|
*/
|
|
|
|
DataSource.prototype.enableRemote = function (operation) {
|
|
var op = this.getOperation(operation);
|
|
if (op) {
|
|
op.remoteEnabled = true;
|
|
} else {
|
|
throw new Error(operation + ' is not provided by the attached connector');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Disable remote access to a data source operation. Each [connector](#connector) has its own set of set enabled
|
|
* and disabled operations. To list the operations, call `dataSource.operations()`.
|
|
*
|
|
*```js
|
|
* var oracle = loopback.createDataSource({
|
|
* connector: require('loopback-connector-oracle'),
|
|
* host: '...',
|
|
* ...
|
|
* });
|
|
* oracle.disableRemote('destroyAll');
|
|
* ```
|
|
* **Notes:**
|
|
*
|
|
* - Disabled operations will not be added to attached models.
|
|
* - Disabling the remoting for a method only affects client access (it will still be available from server models).
|
|
* - Data sources must enable / disable operations before attaching or creating models.
|
|
* @param {String} operation The operation name
|
|
*/
|
|
|
|
DataSource.prototype.disableRemote = function (operation) {
|
|
var op = this.getOperation(operation);
|
|
if (op) {
|
|
op.remoteEnabled = false;
|
|
} else {
|
|
throw new Error(operation + ' is not provided by the attached connector');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get an operation's metadata.
|
|
* @param {String} operation The operation name
|
|
*/
|
|
|
|
DataSource.prototype.getOperation = function (operation) {
|
|
var ops = this.operations();
|
|
var opKeys = Object.keys(ops);
|
|
|
|
for (var i = 0; i < opKeys.length; i++) {
|
|
var op = ops[opKeys[i]];
|
|
|
|
if (op.name === operation) {
|
|
return op;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return JSON object describing all operations.
|
|
*
|
|
* Example return value:
|
|
* ```js
|
|
* {
|
|
* find: {
|
|
* remoteEnabled: true,
|
|
* accepts: [...],
|
|
* returns: [...]
|
|
* enabled: true
|
|
* },
|
|
* save: {
|
|
* remoteEnabled: true,
|
|
* prototype: true,
|
|
* accepts: [...],
|
|
* returns: [...],
|
|
* enabled: true
|
|
* },
|
|
* ...
|
|
* }
|
|
* ```
|
|
*/
|
|
DataSource.prototype.operations = function () {
|
|
return this._operations;
|
|
}
|
|
|
|
/**
|
|
* Define an operation to the data source
|
|
* @param {String} name The operation name
|
|
* @param {Object} options The options
|
|
* @param {Function} fn The function
|
|
*/
|
|
DataSource.prototype.defineOperation = function (name, options, fn) {
|
|
options.fn = fn;
|
|
options.name = name;
|
|
this._operations[name] = options;
|
|
};
|
|
|
|
/**
|
|
* Check if the backend is a relational DB
|
|
* @returns {Boolean}
|
|
*/
|
|
DataSource.prototype.isRelational = function () {
|
|
return this.connector && this.connector.relational;
|
|
};
|
|
|
|
/*!
|
|
* Check if the data source is ready.
|
|
* Returns a Boolean value.
|
|
* @param {Object} obj ?
|
|
* @param {Object} args ?
|
|
*/
|
|
DataSource.prototype.ready = function (obj, args) {
|
|
var self = this;
|
|
if (this.connected) {
|
|
// Connected
|
|
return false;
|
|
}
|
|
|
|
var method = args.callee;
|
|
// Set up a callback after the connection is established to continue the method call
|
|
|
|
var onConnected = null, onError = null;
|
|
onConnected = function () {
|
|
// Remove the error handler
|
|
self.removeListener('error', onError);
|
|
method.apply(obj, [].slice.call(args));
|
|
};
|
|
onError = function (err) {
|
|
// Remove the connected listener
|
|
self.removeListener('connected', onConnected);
|
|
var params = [].slice.call(args);
|
|
var cb = params.pop();
|
|
if (typeof cb === 'function') {
|
|
cb(err);
|
|
}
|
|
};
|
|
this.once('connected', onConnected);
|
|
this.once('error', onError);
|
|
if (!this.connecting) {
|
|
this.connect();
|
|
}
|
|
return true;
|
|
};
|
|
|
|
/**
|
|
* Define a hidden property
|
|
* @param {Object} obj The property owner
|
|
* @param {String} key The property name
|
|
* @param {Mixed} value The default value
|
|
*/
|
|
function hiddenProperty(obj, key, value) {
|
|
Object.defineProperty(obj, key, {
|
|
writable: false,
|
|
enumerable: false,
|
|
configurable: false,
|
|
value: value
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Define readonly property on object
|
|
*
|
|
* @param {Object} obj The property owner
|
|
* @param {String} key The property name
|
|
* @param {Mixed} value The default value
|
|
*/
|
|
function defineReadonlyProp(obj, key, value) {
|
|
Object.defineProperty(obj, key, {
|
|
writable: false,
|
|
enumerable: true,
|
|
configurable: true,
|
|
value: value
|
|
});
|
|
}
|
|
|
|
// Carry over a few properties/methods from the ModelBuilder as some tests use them
|
|
DataSource.Text = ModelBuilder.Text;
|
|
DataSource.JSON = ModelBuilder.JSON;
|
|
DataSource.Any = ModelBuilder.Any;
|
|
|
|
/*!
|
|
* @deprecated Use ModelBuilder.registerType instead
|
|
* @param type
|
|
*/
|
|
DataSource.registerType = function (type) {
|
|
ModelBuilder.registerType(type);
|
|
};
|
|
|