570 lines
16 KiB
JavaScript
570 lines
16 KiB
JavaScript
var safeRequire = require('../utils').safeRequire;
|
|
|
|
/**
|
|
* Module dependencies
|
|
*/
|
|
var pg = safeRequire('pg');
|
|
var BaseSQL = require('../sql');
|
|
var util = require('util');
|
|
|
|
exports.initialize = function initializeSchema(schema, callback) {
|
|
if (!pg) return;
|
|
|
|
var Client = pg.Client;
|
|
var s = schema.settings;
|
|
schema.client = new Client(s.url ? s.url : {
|
|
host: s.host || 'localhost',
|
|
port: s.port || 5432,
|
|
user: s.username,
|
|
password: s.password,
|
|
database: s.database,
|
|
debug: s.debug
|
|
});
|
|
schema.adapter = new PG(schema.client);
|
|
|
|
schema.adapter.connect(callback);
|
|
};
|
|
|
|
function PG(client) {
|
|
this._models = {};
|
|
this.client = client;
|
|
}
|
|
|
|
require('util').inherits(PG, BaseSQL);
|
|
|
|
PG.prototype.connect = function (callback) {
|
|
this.client.connect(function (err) {
|
|
if (!err){
|
|
callback();
|
|
}else{
|
|
console.error(err);
|
|
throw err;
|
|
}
|
|
});
|
|
};
|
|
|
|
PG.prototype.query = function (sql, callback) {
|
|
var time = Date.now();
|
|
var log = this.log;
|
|
this.client.query(sql, function (err, data) {
|
|
if (log) log(sql, time);
|
|
callback(err, data ? data.rows : null);
|
|
});
|
|
};
|
|
|
|
/**
|
|
* Must invoke callback(err, id)
|
|
*/
|
|
PG.prototype.create = function (model, data, callback) {
|
|
var fields = this.toFields(model, data, true);
|
|
var sql = 'INSERT INTO ' + this.tableEscaped(model) + '';
|
|
if (fields) {
|
|
sql += ' ' + fields;
|
|
} else {
|
|
sql += ' VALUES ()';
|
|
}
|
|
sql += ' RETURNING id';
|
|
this.query(sql, function (err, info) {
|
|
if (err) return callback(err);
|
|
callback(err, info && info[0] && info[0].id);
|
|
});
|
|
};
|
|
|
|
PG.prototype.updateOrCreate = function (model, data, callback) {
|
|
var pg = this;
|
|
var fieldsNames = [];
|
|
var fieldValues = [];
|
|
var combined = [];
|
|
var props = this._models[model].properties;
|
|
Object.keys(data).forEach(function (key) {
|
|
if (props[key] || key === 'id') {
|
|
var k = '"' + key + '"';
|
|
var v;
|
|
if (key !== 'id') {
|
|
v = pg.toDatabase(props[key], data[key]);
|
|
} else {
|
|
v = data[key];
|
|
}
|
|
fieldsNames.push(k);
|
|
fieldValues.push(v);
|
|
if (key !== 'id') combined.push(k + ' = ' + v);
|
|
}
|
|
});
|
|
|
|
var sql = 'UPDATE ' + this.tableEscaped(model);
|
|
sql += ' SET ' + combined + ' WHERE id = ' + data.id + ';';
|
|
sql += ' INSERT INTO ' + this.tableEscaped(model);
|
|
sql += ' (' + fieldsNames.join(', ') + ')';
|
|
sql += ' SELECT ' + fieldValues.join(', ')
|
|
sql += ' WHERE NOT EXISTS (SELECT 1 FROM ' + this.tableEscaped(model);
|
|
sql += ' WHERE id = ' + data.id + ') RETURNING id';
|
|
|
|
this.query(sql, function (err, info) {
|
|
if (!err && info && info[0] && info[0].id) {
|
|
data.id = info[0].id;
|
|
}
|
|
callback(err, data);
|
|
});
|
|
};
|
|
|
|
PG.prototype.toFields = function (model, data, forCreate) {
|
|
var fields = [];
|
|
var props = this._models[model].properties;
|
|
|
|
if(forCreate){
|
|
var columns = [];
|
|
Object.keys(data).forEach(function (key) {
|
|
if (props[key]) {
|
|
if (key === 'id') return;
|
|
columns.push('"' + key + '"');
|
|
fields.push(this.toDatabase(props[key], data[key]));
|
|
}
|
|
}.bind(this));
|
|
return '(' + columns.join(',') + ') VALUES ('+fields.join(',')+')';
|
|
}else{
|
|
Object.keys(data).forEach(function (key) {
|
|
if (props[key]) {
|
|
fields.push('"' + key + '" = ' + this.toDatabase(props[key], data[key]));
|
|
}
|
|
}.bind(this));
|
|
return fields.join(',');
|
|
}
|
|
};
|
|
|
|
function dateToPostgres(val) {
|
|
return [
|
|
val.getUTCFullYear(),
|
|
fz(val.getUTCMonth() + 1),
|
|
fz(val.getUTCDate())
|
|
].join('-') + ' ' + [
|
|
fz(val.getUTCHours()),
|
|
fz(val.getUTCMinutes()),
|
|
fz(val.getUTCSeconds())
|
|
].join(':');
|
|
|
|
function fz(v) {
|
|
return v < 10 ? '0' + v : v;
|
|
}
|
|
}
|
|
|
|
PG.prototype.toDatabase = function (prop, val) {
|
|
if (val === null) {
|
|
// Postgres complains with NULLs in not null columns
|
|
// If we have an autoincrement value, return DEFAULT instead
|
|
if( prop.autoIncrement ) {
|
|
return 'DEFAULT';
|
|
}
|
|
else {
|
|
return 'NULL';
|
|
}
|
|
}
|
|
if (val.constructor.name === 'Object') {
|
|
var operator = Object.keys(val)[0]
|
|
val = val[operator];
|
|
if (operator === 'between') {
|
|
return this.toDatabase(prop, val[0]) + ' AND ' + this.toDatabase(prop, val[1]);
|
|
}
|
|
}
|
|
if (prop.type.name === 'Number') {
|
|
if (!val && val!=0) {
|
|
if( prop.autoIncrement ) {
|
|
return 'DEFAULT';
|
|
}
|
|
else {
|
|
return 'NULL';
|
|
}
|
|
}
|
|
return val
|
|
};
|
|
|
|
if (prop.type.name === 'Date') {
|
|
if (!val) {
|
|
if( prop.autoIncrement ) {
|
|
return 'DEFAULT';
|
|
}
|
|
else {
|
|
return 'NULL';
|
|
}
|
|
}
|
|
if (!val.toUTCString) {
|
|
val = new Date(val);
|
|
}
|
|
return escape(dateToPostgres(val));
|
|
}
|
|
return escape(val.toString());
|
|
|
|
};
|
|
|
|
PG.prototype.fromDatabase = function (model, data) {
|
|
if (!data) return null;
|
|
var props = this._models[model].properties;
|
|
Object.keys(data).forEach(function (key) {
|
|
var val = data[key];
|
|
data[key] = val;
|
|
});
|
|
return data;
|
|
};
|
|
|
|
PG.prototype.escapeName = function (name) {
|
|
return '"' + name.replace(/\./g, '"."') + '"';
|
|
};
|
|
|
|
PG.prototype.all = function all(model, filter, callback) {
|
|
this.query('SELECT * FROM ' + this.tableEscaped(model) + ' ' + this.toFilter(model, filter), function (err, data) {
|
|
if (err) {
|
|
return callback(err, []);
|
|
}
|
|
callback(err, data);
|
|
}.bind(this));
|
|
};
|
|
|
|
PG.prototype.toFilter = function (model, filter) {
|
|
if (filter && typeof filter.where === 'function') {
|
|
return filter();
|
|
}
|
|
if (!filter) return '';
|
|
var props = this._models[model].properties;
|
|
var out = '';
|
|
if (filter.where) {
|
|
var fields = [];
|
|
var conds = filter.where;
|
|
Object.keys(conds).forEach(function (key) {
|
|
if (filter.where[key] && filter.where[key].constructor.name === 'RegExp') {
|
|
return;
|
|
}
|
|
if (props[key]) {
|
|
var filterValue = this.toDatabase(props[key], filter.where[key]);
|
|
if (filterValue === 'NULL') {
|
|
fields.push('"' + key + '" IS ' + filterValue);
|
|
} else if (conds[key].constructor.name === 'Object') {
|
|
var condType = Object.keys(conds[key])[0];
|
|
var sqlCond = '"' + key + '"';
|
|
switch (condType) {
|
|
case 'gt':
|
|
sqlCond += ' > ';
|
|
break;
|
|
case 'gte':
|
|
sqlCond += ' >= ';
|
|
break;
|
|
case 'lt':
|
|
sqlCond += ' < ';
|
|
break;
|
|
case 'lte':
|
|
sqlCond += ' <= ';
|
|
break;
|
|
case 'between':
|
|
sqlCond += ' BETWEEN ';
|
|
break;
|
|
case 'inq':
|
|
sqlCond += ' IN ';
|
|
break;
|
|
case 'nin':
|
|
sqlCond += ' NOT IN ';
|
|
break;
|
|
case 'neq':
|
|
sqlCond += ' != ';
|
|
break;
|
|
}
|
|
sqlCond += (condType == 'inq' || condType == 'nin') ? '(' + filterValue + ')' : filterValue;
|
|
fields.push(sqlCond);
|
|
} else {
|
|
fields.push('"' + key + '" = ' + filterValue);
|
|
}
|
|
}
|
|
}.bind(this));
|
|
if (fields.length) {
|
|
out += ' WHERE ' + fields.join(' AND ');
|
|
}
|
|
}
|
|
|
|
if (filter.order) {
|
|
out += ' ORDER BY ' + filter.order;
|
|
}
|
|
|
|
if (filter.limit) {
|
|
out += ' LIMIT ' + filter.limit + ' OFFSET ' + (filter.offset || '0');
|
|
}
|
|
|
|
return out;
|
|
};
|
|
|
|
function getTableStatus(model, cb){
|
|
function decoratedCallback(err, data){
|
|
data.forEach(function(field){
|
|
field.Type = mapPostgresDatatypes(field.Type);
|
|
});
|
|
cb(err, data);
|
|
};
|
|
this.query('SELECT column_name as "Field", udt_name as "Type", is_nullable as "Null", column_default as "Default" FROM information_schema.COLUMNS WHERE table_name = \'' + this.table(model) + '\'', decoratedCallback);
|
|
};
|
|
|
|
PG.prototype.autoupdate = function (cb) {
|
|
var self = this;
|
|
var wait = 0;
|
|
Object.keys(this._models).forEach(function (model) {
|
|
wait += 1;
|
|
var fields;
|
|
getTableStatus.call(self, model, function(err, fields){
|
|
if(err) console.log(err);
|
|
self.alterTable(model, fields, done);
|
|
});
|
|
});
|
|
|
|
function done(err) {
|
|
if (err) {
|
|
console.log(err);
|
|
}
|
|
if (--wait === 0 && cb) {
|
|
cb();
|
|
}
|
|
};
|
|
};
|
|
|
|
PG.prototype.isActual = function(cb) {
|
|
var self = this;
|
|
var wait = 0;
|
|
changes = [];
|
|
Object.keys(this._models).forEach(function (model) {
|
|
wait += 1;
|
|
getTableStatus.call(self, model, function(err, fields){
|
|
changes = changes.concat(getPendingChanges.call(self, model, fields));
|
|
done(err, changes);
|
|
});
|
|
});
|
|
|
|
function done(err, fields) {
|
|
if (err) {
|
|
console.log(err);
|
|
}
|
|
if (--wait === 0 && cb) {
|
|
var actual = (changes.length === 0);
|
|
cb(null, actual);
|
|
}
|
|
};
|
|
};
|
|
|
|
PG.prototype.alterTable = function (model, actualFields, done) {
|
|
var self = this;
|
|
var pendingChanges = getPendingChanges.call(self, model, actualFields);
|
|
applySqlChanges.call(self, model, pendingChanges, done);
|
|
};
|
|
|
|
function getPendingChanges(model, actualFields){
|
|
var sql = [];
|
|
var self = this;
|
|
sql = sql.concat(getColumnsToAdd.call(self, model, actualFields));
|
|
sql = sql.concat(getPropertiesToModify.call(self, model, actualFields));
|
|
sql = sql.concat(getColumnsToDrop.call(self, model, actualFields));
|
|
return sql;
|
|
};
|
|
|
|
function getColumnsToAdd(model, actualFields){
|
|
var self = this;
|
|
var m = self._models[model];
|
|
var propNames = Object.keys(m.properties);
|
|
var sql = [];
|
|
propNames.forEach(function (propName) {
|
|
if (propName === 'id') return;
|
|
var found = searchForPropertyInActual.call(self, propName, actualFields);
|
|
if(!found && propertyHasNotBeenDeleted.call(self, model, propName)){
|
|
sql.push(addPropertyToActual.call(self, model, propName));
|
|
}
|
|
});
|
|
return sql;
|
|
};
|
|
|
|
function addPropertyToActual(model, propName){
|
|
var self = this;
|
|
var p = self._models[model].properties[propName];
|
|
var sqlCommand = 'ADD COLUMN "' + propName + '" ' + datatype(p) + " " + (propertyCanBeNull.call(self, model, propName) ? "" : " NOT NULL");
|
|
return sqlCommand;
|
|
};
|
|
|
|
function searchForPropertyInActual(propName, actualFields){
|
|
var found = false;
|
|
actualFields.forEach(function (f) {
|
|
if (f.Field === propName) {
|
|
found = f;
|
|
return;
|
|
}
|
|
});
|
|
return found;
|
|
};
|
|
|
|
function getPropertiesToModify(model, actualFields){
|
|
var self = this;
|
|
var sql = [];
|
|
var m = self._models[model];
|
|
var propNames = Object.keys(m.properties);
|
|
var found;
|
|
propNames.forEach(function (propName) {
|
|
if (propName === 'id') return;
|
|
found = searchForPropertyInActual.call(self, propName, actualFields);
|
|
if(found && propertyHasNotBeenDeleted.call(self, model, propName)){
|
|
if (datatypeChanged(propName, found)) {
|
|
sql.push(modifyDatatypeInActual.call(self, model, propName));
|
|
}
|
|
if (nullabilityChanged(propName, found)){
|
|
sql.push(modifyNullabilityInActual.call(self, model, propName));
|
|
}
|
|
}
|
|
});
|
|
|
|
return sql;
|
|
|
|
function datatypeChanged(propName, oldSettings){
|
|
var newSettings = m.properties[propName];
|
|
if(!newSettings) return false;
|
|
return oldSettings.Type.toLowerCase() !== datatype(newSettings);
|
|
};
|
|
|
|
function nullabilityChanged(propName, oldSettings){
|
|
var newSettings = m.properties[propName];
|
|
if(!newSettings) return false;
|
|
var changed = false;
|
|
if (oldSettings.Null === 'YES' && (newSettings.allowNull === false || newSettings.null === false)) changed = true;
|
|
if (oldSettings.Null === 'NO' && !(newSettings.allowNull === false || newSettings.null === false)) changed = true;
|
|
return changed;
|
|
};
|
|
};
|
|
|
|
function modifyDatatypeInActual(model, propName) {
|
|
var self = this;
|
|
var sqlCommand = 'ALTER COLUMN "' + propName + '" TYPE ' + datatype(self._models[model].properties[propName]);
|
|
return sqlCommand;
|
|
};
|
|
|
|
function modifyNullabilityInActual(model, propName) {
|
|
var self = this;
|
|
var sqlCommand = 'ALTER COLUMN "' + propName + '" ';
|
|
if(propertyCanBeNull.call(self, model, propName)){
|
|
sqlCommand = sqlCommand + "DROP ";
|
|
} else {
|
|
sqlCommand = sqlCommand + "SET ";
|
|
}
|
|
sqlCommand = sqlCommand + "NOT NULL";
|
|
return sqlCommand;
|
|
};
|
|
|
|
function getColumnsToDrop(model, actualFields){
|
|
var self = this;
|
|
var sql = [];
|
|
actualFields.forEach(function (actualField) {
|
|
if (actualField.Field === 'id') return;
|
|
if (actualFieldNotPresentInModel(actualField, model)) {
|
|
sql.push('DROP COLUMN "' + actualField.Field + '"');
|
|
}
|
|
});
|
|
return sql;
|
|
|
|
function actualFieldNotPresentInModel(actualField, model){
|
|
return !(self._models[model].properties[actualField.Field]);
|
|
};
|
|
};
|
|
|
|
function applySqlChanges(model, pendingChanges, done){
|
|
var self = this;
|
|
if (pendingChanges.length) {
|
|
var thisQuery = 'ALTER TABLE ' + self.tableEscaped(model);
|
|
var ranOnce = false;
|
|
pendingChanges.forEach(function(change){
|
|
if(ranOnce) thisQuery = thisQuery + ',';
|
|
thisQuery = thisQuery + ' ' + change;
|
|
ranOnce = true;
|
|
});
|
|
thisQuery = thisQuery + ';';
|
|
self.query(thisQuery, callback);
|
|
}
|
|
|
|
function callback(err, data){
|
|
if(err) console.log(err);
|
|
}
|
|
|
|
done();
|
|
};
|
|
|
|
PG.prototype.propertiesSQL = function (model) {
|
|
var self = this;
|
|
var sql = ['"id" SERIAL PRIMARY KEY'];
|
|
Object.keys(this._models[model].properties).forEach(function (prop) {
|
|
if (prop === 'id') return;
|
|
sql.push('"' + prop + '" ' + self.propertySettingsSQL(model, prop));
|
|
});
|
|
return sql.join(',\n ');
|
|
|
|
};
|
|
|
|
PG.prototype.propertySettingsSQL = function (model, propName) {
|
|
var self = this;
|
|
var p = self._models[model].properties[propName];
|
|
var result = datatype(p) + ' ';
|
|
if(!propertyCanBeNull.call(self, model, propName)) result = result + 'NOT NULL ';
|
|
return result;
|
|
};
|
|
|
|
function propertyCanBeNull(model, propName){
|
|
var p = this._models[model].properties[propName];
|
|
return !(p.allowNull === false || p['null'] === false);
|
|
};
|
|
|
|
function escape(val) {
|
|
if (val === undefined || val === null) {
|
|
return 'NULL';
|
|
}
|
|
|
|
switch (typeof val) {
|
|
case 'boolean': return (val) ? 'true' : 'false';
|
|
case 'number': return val+'';
|
|
}
|
|
|
|
if (typeof val === 'object') {
|
|
val = (typeof val.toISOString === 'function')
|
|
? val.toISOString()
|
|
: val.toString();
|
|
}
|
|
|
|
val = val.replace(/[\0\n\r\b\t\\\'\"\x1a]/g, function(s) {
|
|
switch(s) {
|
|
case "\0": return "\\0";
|
|
case "\n": return "\\n";
|
|
case "\r": return "\\r";
|
|
case "\b": return "\\b";
|
|
case "\t": return "\\t";
|
|
case "\x1a": return "\\Z";
|
|
default: return "\\"+s;
|
|
}
|
|
});
|
|
return "E'"+val+"'";
|
|
};
|
|
|
|
function datatype(p) {
|
|
switch (p.type.name) {
|
|
default:
|
|
case 'String':
|
|
case 'JSON':
|
|
return 'varchar';
|
|
case 'Text':
|
|
return 'text';
|
|
case 'Number':
|
|
return 'integer';
|
|
case 'Date':
|
|
return 'timestamp';
|
|
case 'Boolean':
|
|
return 'boolean';
|
|
}
|
|
};
|
|
|
|
function mapPostgresDatatypes(typeName) {
|
|
//TODO there are a lot of synonymous type names that should go here-- this is just what i've run into so far
|
|
switch (typeName){
|
|
case 'int4':
|
|
return 'integer';
|
|
default:
|
|
return typeName;
|
|
}
|
|
};
|
|
|
|
function propertyHasNotBeenDeleted(model, propName){
|
|
return !!this._models[model].properties[propName];
|
|
};
|