526 lines
16 KiB
JavaScript
526 lines
16 KiB
JavaScript
var safeRequire = require('../utils').safeRequire;
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/**
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* Module dependencies
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*/
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var mysql = safeRequire('mysql');
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var BaseSQL = require('../sql');
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exports.initialize = function initializeSchema(schema, callback) {
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if (!mysql) return;
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var s = schema.settings;
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schema.client = mysql.createClient({
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host: s.host || 'localhost',
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port: s.port || 3306,
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user: s.username,
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password: s.password,
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debug: s.debug
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});
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schema.adapter = new MySQL(schema.client);
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schema.adapter.schema = schema;
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// schema.client.query('SET TIME_ZONE = "+04:00"', callback);
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schema.client.query('USE `' + s.database + '`', function (err) {
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if (err && err.message.match(/^unknown database/i)) {
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var dbName = s.database;
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schema.client.query('CREATE DATABASE ' + dbName, function (error) {
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if (!error) {
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schema.client.query('USE ' + s.database, callback);
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} else {
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throw error;
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}
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});
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} else callback();
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});
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};
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/**
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* MySQL adapter
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*/
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function MySQL(client) {
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this._models = {};
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this.client = client;
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}
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require('util').inherits(MySQL, BaseSQL);
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MySQL.prototype.query = function (sql, callback) {
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if (!this.schema.connected) {
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return this.schema.on('connected', function () {
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this.query(sql, callback);
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}.bind(this));
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}
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var client = this.client;
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var time = Date.now();
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var log = this.log;
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if (typeof callback !== 'function') throw new Error('callback should be a function');
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this.client.query(sql, function (err, data) {
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if (err && err.message.match(/^unknown database/i)) {
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var dbName = err.message.match(/^unknown database '(.*?)'/i)[1];
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client.query('CREATE DATABASE ' + dbName, function (error) {
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if (!error) {
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client.query(sql, callback);
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} else {
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callback(err);
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}
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});
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return;
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}
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if (log) log(sql, time);
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callback(err, data);
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});
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};
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/**
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* Must invoke callback(err, id)
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*/
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MySQL.prototype.create = function (model, data, callback) {
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var fields = this.toFields(model, data);
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var sql = 'INSERT INTO ' + this.tableEscaped(model);
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if (fields) {
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sql += ' SET ' + fields;
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} else {
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sql += ' VALUES ()';
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}
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this.query(sql, function (err, info) {
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callback(err, info && info.insertId);
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});
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};
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MySQL.prototype.updateOrCreate = function (model, data, callback) {
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var mysql = this;
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var fieldsNames = [];
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var fieldValues = [];
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var combined = [];
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var props = this._models[model].properties;
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Object.keys(data).forEach(function (key) {
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if (props[key] || key === 'id') {
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var k = '`' + key + '`';
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var v;
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if (key !== 'id') {
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v = mysql.toDatabase(props[key], data[key]);
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} else {
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v = data[key];
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}
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fieldsNames.push(k);
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fieldValues.push(v);
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if (key !== 'id') combined.push(k + ' = ' + v);
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}
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});
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var sql = 'INSERT INTO ' + this.tableEscaped(model);
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sql += ' (' + fieldsNames.join(', ') + ')';
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sql += ' VALUES (' + fieldValues.join(', ') + ')';
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sql += ' ON DUPLICATE KEY UPDATE ' + combined.join(', ');
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this.query(sql, function (err, info) {
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if (!err && info && info.insertId) {
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data.id = info.insertId;
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}
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callback(err, data);
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});
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};
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MySQL.prototype.toFields = function (model, data) {
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var fields = [];
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var props = this._models[model].properties;
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Object.keys(data).forEach(function (key) {
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if (props[key]) {
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fields.push('`' + key.replace(/\./g, '`.`') + '` = ' + this.toDatabase(props[key], data[key]));
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}
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}.bind(this));
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return fields.join(',');
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};
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function dateToMysql(val) {
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return val.getUTCFullYear() + '-' +
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fillZeros(val.getUTCMonth() + 1) + '-' +
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fillZeros(val.getUTCDate()) + ' ' +
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fillZeros(val.getUTCHours()) + ':' +
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fillZeros(val.getUTCMinutes()) + ':' +
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fillZeros(val.getUTCSeconds());
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function fillZeros(v) {
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return v < 10 ? '0' + v : v;
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}
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}
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MySQL.prototype.toDatabase = function (prop, val) {
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if (val === null) return 'NULL';
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if (val.constructor.name === 'Object') {
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var operator = Object.keys(val)[0]
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val = val[operator];
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if (operator === 'between') {
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return this.toDatabase(prop, val[0]) +
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' AND ' +
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this.toDatabase(prop, val[1]);
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} else if (operator == 'inq' || operator == 'nin') {
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if (!(val.propertyIsEnumerable('length')) && typeof val === 'object' && typeof val.length === 'number') { //if value is array
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return val.join(',');
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} else {
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return val;
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}
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}
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}
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if (!prop) return val;
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if (prop.type.name === 'Number') return val;
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if (prop.type.name === 'Date') {
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if (!val) return 'NULL';
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if (!val.toUTCString) {
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val = new Date(val);
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}
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return '"' + dateToMysql(val) + '"';
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}
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if (prop.type.name == "Boolean") return val ? 1 : 0;
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return this.client.escape(val.toString());
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};
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MySQL.prototype.fromDatabase = function (model, data) {
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if (!data) return null;
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var props = this._models[model].properties;
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Object.keys(data).forEach(function (key) {
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var val = data[key];
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if (props[key]) {
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if (props[key].type.name === 'Date' && val !== null) {
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val = new Date(val.toString().replace(/GMT.*$/, 'GMT'));
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}
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}
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data[key] = val;
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});
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return data;
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};
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MySQL.prototype.escapeName = function (name) {
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return '`' + name.replace(/\./g, '`.`') + '`';
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};
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MySQL.prototype.all = function all(model, filter, callback) {
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var sql = 'SELECT * FROM ' + this.tableEscaped(model);
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var self = this;
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var props = this._models[model].properties;
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if (filter) {
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if (filter.where) {
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sql += ' ' + buildWhere(filter.where);
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}
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if (filter.order) {
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sql += ' ' + buildOrderBy(filter.order);
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}
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if (filter.limit) {
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sql += ' ' + buildLimit(filter.limit, filter.offset || 0);
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}
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}
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this.query(sql, function (err, data) {
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if (err) {
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return callback(err, []);
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}
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callback(null, data.map(function (obj) {
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return self.fromDatabase(model, obj);
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}));
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}.bind(this));
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return sql;
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function buildWhere(conds) {
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var cs = [];
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Object.keys(conds).forEach(function (key) {
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var keyEscaped = '`' + key.replace(/\./g, '`.`') + '`'
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var val = self.toDatabase(props[key], conds[key]);
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if (conds[key] === null) {
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cs.push(keyEscaped + ' IS NULL');
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} else if (conds[key].constructor.name === 'Object') {
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var condType = Object.keys(conds[key])[0];
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var sqlCond = keyEscaped;
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switch (condType) {
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case 'gt':
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sqlCond += ' > ';
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break;
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case 'gte':
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sqlCond += ' >= ';
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break;
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case 'lt':
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sqlCond += ' < ';
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break;
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case 'lte':
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sqlCond += ' <= ';
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break;
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case 'between':
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sqlCond += ' BETWEEN ';
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break;
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case 'inq':
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sqlCond += ' IN ';
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break;
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case 'nin':
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sqlCond += ' NOT IN ';
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break;
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case 'neq':
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sqlCond += ' != ';
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break;
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}
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sqlCond += (condType == 'inq' || condType == 'nin') ? '(' + val + ')' : val;
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cs.push(sqlCond);
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} else {
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cs.push(keyEscaped + ' = ' + val);
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}
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});
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if (cs.length === 0) {
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return '';
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}
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return 'WHERE ' + cs.join(' AND ');
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}
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function buildOrderBy(order) {
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if (typeof order === 'string') order = [order];
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return 'ORDER BY ' + order.join(', ');
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}
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function buildLimit(limit, offset) {
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return 'LIMIT ' + (offset ? (offset + ', ' + limit) : limit);
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}
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};
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MySQL.prototype.autoupdate = function (cb) {
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var self = this;
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var wait = 0;
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Object.keys(this._models).forEach(function (model) {
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wait += 1;
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self.query('SHOW FIELDS FROM ' + self.tableEscaped(model), function (err, fields) {
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self.query('SHOW INDEXES FROM ' + self.tableEscaped(model), function (err, indexes) {
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if (!err && fields.length) {
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self.alterTable(model, fields, indexes, done);
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} else {
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self.createTable(model, done);
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}
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});
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});
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});
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function done(err) {
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if (err) {
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console.log(err);
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}
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if (--wait === 0 && cb) {
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cb();
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}
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}
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};
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MySQL.prototype.isActual = function (cb) {
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var ok = false;
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var self = this;
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var wait = 0;
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Object.keys(this._models).forEach(function (model) {
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wait += 1;
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self.query('SHOW FIELDS FROM ' + model, function (err, fields) {
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self.query('SHOW INDEXES FROM ' + model, function (err, indexes) {
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self.alterTable(model, fields, indexes, done, true);
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});
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});
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});
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function done(err, needAlter) {
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if (err) {
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console.log(err);
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}
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ok = ok || needAlter;
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if (--wait === 0 && cb) {
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cb(null, !ok);
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}
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}
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};
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MySQL.prototype.alterTable = function (model, actualFields, actualIndexes, done, checkOnly) {
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var self = this;
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var m = this._models[model];
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var propNames = Object.keys(m.properties).filter(function (name) {
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return !!m.properties[name];
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});
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var indexNames = m.settings.indexes ? Object.keys(m.settings.indexes).filter(function (name) {
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return !!m.settings.indexes[name];
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}) : [];
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var sql = [];
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var ai = {};
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if (actualIndexes) {
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actualIndexes.forEach(function (i) {
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var name = i.Key_name;
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if (!ai[name]) {
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ai[name] = {
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info: i,
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columns: []
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};
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}
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ai[name].columns[i.Seq_in_index - 1] = i.Column_name;
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});
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}
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var aiNames = Object.keys(ai);
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// change/add new fields
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propNames.forEach(function (propName) {
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var found;
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actualFields.forEach(function (f) {
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if (f.Field === propName) {
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found = f;
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}
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});
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if (found) {
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actualize(propName, found);
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} else {
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sql.push('ADD COLUMN `' + propName + '` ' + self.propertySettingsSQL(model, propName));
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}
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});
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// drop columns
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actualFields.forEach(function (f) {
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var notFound = !~propNames.indexOf(f.Field);
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if (f.Field === 'id') return;
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if (notFound || !m.properties[f.Field]) {
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sql.push('DROP COLUMN `' + f.Field + '`');
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}
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});
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// remove indexes
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aiNames.forEach(function (indexName) {
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if (indexName === 'id' || indexName === 'PRIMARY') return;
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if (indexNames.indexOf(indexName) === -1 && !m.properties[indexName] || m.properties[indexName] && !m.properties[indexName].index) {
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sql.push('DROP INDEX `' + indexName + '`');
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} else {
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// first: check single (only type and kind)
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if (m.properties[indexName] && !m.properties[indexName].index) {
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// TODO
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return;
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}
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// second: check multiple indexes
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var orderMatched = true;
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if (indexNames.indexOf(indexName) !== -1) {
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m.settings.indexes[indexName].columns.split(/,\s*/).forEach(function (columnName, i) {
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if (ai[indexName].columns[i] !== columnName) orderMatched = false;
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});
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}
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if (!orderMatched) {
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sql.push('DROP INDEX `' + indexName + '`');
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delete ai[indexName];
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}
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}
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});
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// add single-column indexes
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propNames.forEach(function (propName) {
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var i = m.properties[propName].index;
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if (!i) {
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return;
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}
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var found = ai[propName] && ai[propName].info;
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if (!found) {
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var type = '';
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var kind = '';
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if (i.type) {
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type = 'USING ' + i.type;
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}
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if (i.kind) {
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// kind = i.kind;
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}
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if (kind && type) {
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sql.push('ADD ' + kind + ' INDEX `' + propName + '` (`' + propName + '`) ' + type);
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} else {
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sql.push('ADD ' + kind + ' INDEX `' + propName + '` ' + type + ' (`' + propName + '`) ');
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}
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}
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});
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// add multi-column indexes
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indexNames.forEach(function (indexName) {
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var i = m.settings.indexes[indexName];
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var found = ai[indexName] && ai[indexName].info;
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if (!found) {
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var type = '';
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var kind = '';
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if (i.type) {
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type = 'USING ' + i.kind;
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}
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if (i.kind) {
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kind = i.kind;
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}
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if (kind && type) {
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sql.push('ADD ' + kind + ' INDEX `' + indexName + '` (' + i.columns + ') ' + type);
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} else {
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sql.push('ADD ' + kind + ' INDEX ' + type + ' `' + indexName + '` (' + i.columns + ')');
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}
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}
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});
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if (sql.length) {
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var query = 'ALTER TABLE `' + model + '` ' + sql.join(',\n');
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if (checkOnly) {
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done(null, true, {statements: sql, query: query});
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} else {
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this.query(query, done);
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}
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} else {
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done();
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}
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function actualize(propName, oldSettings) {
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var newSettings = m.properties[propName];
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if (newSettings && changed(newSettings, oldSettings)) {
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sql.push('CHANGE COLUMN `' + propName + '` `' + propName + '` ' + self.propertySettingsSQL(model, propName));
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}
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}
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function changed(newSettings, oldSettings) {
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if (oldSettings.Null === 'YES' && (newSettings.allowNull === false || newSettings.null === false)) return true;
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if (oldSettings.Null === 'NO' && !(newSettings.allowNull === false || newSettings.null === false)) return true;
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if (oldSettings.Type.toUpperCase() !== datatype(newSettings)) return true;
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return false;
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}
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};
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MySQL.prototype.propertiesSQL = function (model) {
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var self = this;
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var sql = ['`id` INT(11) NOT NULL AUTO_INCREMENT UNIQUE PRIMARY KEY'];
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Object.keys(this._models[model].properties).forEach(function (prop) {
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sql.push('`' + prop + '` ' + self.propertySettingsSQL(model, prop));
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});
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return sql.join(',\n ');
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};
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MySQL.prototype.propertySettingsSQL = function (model, prop) {
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var p = this._models[model].properties[prop];
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return datatype(p) + ' ' +
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(p.allowNull === false || p['null'] === false ? 'NOT NULL' : 'NULL');
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};
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function datatype(p) {
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var dt = '';
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switch (p.type.name) {
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case 'String':
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case 'JSON':
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dt = 'VARCHAR(' + (p.limit || 255) + ')';
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break;
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case 'Text':
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dt = 'TEXT';
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break;
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case 'Number':
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dt = 'INT(' + (p.limit || 11) + ')';
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break;
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case 'Date':
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dt = 'DATETIME';
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break;
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case 'Boolean':
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dt = 'TINYINT(1)';
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break;
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}
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return dt;
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}
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