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sequelize.js
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sequelize.js
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var url = require("url")
, Utils = require("./utils")
, DAOFactory = require("./dao-factory")
, DataTypes = require('./data-types')
, DAOFactoryManager = require("./dao-factory-manager")
, QueryInterface = require("./query-interface")
module.exports = (function() {
/**
Main class of the project.
@param {String} database The name of the database.
@param {String} username The username which is used to authenticate against the database.
@param {String} [password=null] The password which is used to authenticate against the database.
@param {Object} [options={}] An object with options.
@param {String} [options.dialect='mysql'] The dialect of the relational database.
@param {String} [options.dialectModulePath=null] If specified, load the dialect library from this path.
@param {String} [options.host='localhost'] The host of the relational database.
@param {Integer} [options.port=3306] The port of the relational database.
@param {String} [options.protocol='tcp'] The protocol of the relational database.
@param {Object} [options.define={}] Options, which shall be default for every model definition.
@param {Object} [options.query={}] I have absolutely no idea.
@param {Object} [options.sync={}] Options, which shall be default for every `sync` call.
@param {Function} [options.logging=console.log] A function that gets executed everytime Sequelize would log something.
@param {Boolean} [options.omitNull=false] A flag that defines if null values should be passed to SQL queries or not.
@param {Boolean} [options.queue=true] I have absolutely no idea.
@param {Boolean} [options.native=false] A flag that defines if native library shall be used or not.
@param {Boolean} [options.replication=false] I have absolutely no idea.
@param {Object} [options.pool={}] Something.
@param {Boolean} [options.quoteIdentifiers=true] Set to `false` to make table names and attributes case-insensitive on Postgres and skip double quoting of them.
@example
// without password and options
var sequelize = new Sequelize('database', 'username')
// without options
var sequelize = new Sequelize('database', 'username', 'password')
// without password / with blank password
var sequelize = new Sequelize('database', 'username', null, {})
// with password and options
var sequelize = new Sequelize('my_database', 'john', 'doe', {})
@class Sequelize
@constructor
*/
var Sequelize = function(database, username, password, options) {
var urlParts
options = options || {}
if (arguments.length === 1 || (arguments.length === 2 && typeof username === 'object')) {
options = username || {}
urlParts = url.parse(arguments[0])
database = urlParts.path.replace(/^\//, '')
dialect = urlParts.protocol
options.dialect = urlParts.protocol.replace(/:$/, '')
options.host = urlParts.hostname
if (urlParts.port) {
options.port = urlParts.port
}
if (urlParts.auth) {
username = urlParts.auth.split(':')[0]
password = urlParts.auth.split(':')[1]
}
}
this.options = Utils._.extend({
dialect: 'mysql',
dialectModulePath: null,
host: 'localhost',
protocol: 'tcp',
define: {},
query: {},
sync: {},
logging: console.log,
omitNull: false,
queue: true,
native: false,
replication: false,
pool: {},
quoteIdentifiers: true,
language: 'en'
}, options || {})
if (this.options.logging === true) {
console.log('DEPRECATION WARNING: The logging-option should be either a function or false. Default: console.log')
this.options.logging = console.log
}
this.config = {
database: database,
username: username,
password: (( (["", null, false].indexOf(password) > -1) || (typeof password == 'undefined')) ? null : password),
host : this.options.host,
port : this.options.port,
pool : this.options.pool,
protocol: this.options.protocol,
queue : this.options.queue,
native : this.options.native,
replication: this.options.replication,
dialectModulePath: this.options.dialectModulePath,
maxConcurrentQueries: this.options.maxConcurrentQueries
}
try {
var ConnectorManager = require("./dialects/" + this.options.dialect + "/connector-manager")
} catch(err) {
throw new Error("The dialect " + this.options.dialect + " is not supported.")
}
this.daoFactoryManager = new DAOFactoryManager(this)
this.connectorManager = new ConnectorManager(this, this.config)
this.importCache = {}
}
/**
Reference to Utils
*/
Sequelize.Utils = Utils
for (var dataType in DataTypes) {
Sequelize[dataType] = DataTypes[dataType]
}
/**
Returns an instance of QueryInterface.
@method getQueryInterface
@return {QueryInterface} An instance (singleton) of QueryInterface.
*/
Sequelize.prototype.getQueryInterface = function() {
this.queryInterface = this.queryInterface || new QueryInterface(this)
return this.queryInterface
}
/**
Returns an instance (singleton) of Migrator.
@method getMigrator
@param {Object} [options={}] Some options
@param {Boolean} [force=false] A flag that defines if the migrator should get instantiated or not.
@return {Migrator} An instance of Migrator.
*/
Sequelize.prototype.getMigrator = function(options, force) {
var Migrator = require("./migrator")
if (force) {
this.migrator = new Migrator(this, options)
} else {
this.migrator = this.migrator || new Migrator(this, options)
}
return this.migrator
}
Sequelize.prototype.define = function(daoName, attributes, options) {
options = options || {}
var globalOptions = this.options
// If you don't specify a valid data type lets help you debug it
Utils._.each(attributes, function(dataType, name){
if (Utils.isHash(dataType)) {
dataType = dataType.type
}
if (dataType === undefined) {
throw new Error('Unrecognized data type for field '+ name)
}
})
if (globalOptions.define) {
options = Utils._.extend({}, globalOptions.define, options)
Utils._(['classMethods', 'instanceMethods']).each(function(key) {
if (globalOptions.define[key]) {
options[key] = options[key] || {}
Utils._.extend(options[key], globalOptions.define[key])
}
})
}
options.omitNull = globalOptions.omitNull
options.language = globalOptions.language
// if you call "define" multiple times for the same daoName, do not clutter the factory
if(this.isDefined(daoName)) {
this.daoFactoryManager.removeDAO(this.daoFactoryManager.getDAO(daoName))
}
var factory = new DAOFactory(daoName, attributes, options)
this.daoFactoryManager.addDAO(factory.init(this.daoFactoryManager))
return factory
}
Sequelize.prototype.isDefined = function(daoName) {
var daos = this.daoFactoryManager.daos
return (daos.filter(function(dao) { return dao.name === daoName }).length !== 0)
}
Sequelize.prototype.import = function(path) {
if (!this.importCache[path]) {
var defineCall = require(path)
this.importCache[path] = defineCall(this, DataTypes)
}
return this.importCache[path]
}
Sequelize.prototype.migrate = function(options) {
this.getMigrator().migrate(options)
}
Sequelize.prototype.query = function(sql, callee, options, replacements) {
if (arguments.length === 4) {
sql = Utils.format([sql].concat(replacements), this.options.dialect)
} else if (arguments.length === 3) {
options = options
} else if (arguments.length === 2) {
options = {}
} else {
options = { raw: true }
}
options = Utils._.extend(Utils._.clone(this.options.query), options)
options = Utils._.defaults(options, {
logging: this.options.hasOwnProperty('logging') ? this.options.logging : console.log,
type: (sql.toLowerCase().indexOf('select') === 0) ? 'SELECT' : false
})
return this.connectorManager.query(sql, callee, options)
}
Sequelize.prototype.createSchema = function(schema) {
var chainer = new Utils.QueryChainer()
chainer.add(this.getQueryInterface().createSchema(schema))
return chainer.run()
}
Sequelize.prototype.showAllSchemas = function() {
var chainer = new Utils.QueryChainer()
chainer.add(this.getQueryInterface().showAllSchemas())
return chainer.run()
}
Sequelize.prototype.dropSchema = function(schema) {
var chainer = new Utils.QueryChainer()
chainer.add(this.getQueryInterface().dropSchema(schema))
return chainer.run()
}
Sequelize.prototype.dropAllSchemas = function() {
var self = this
var chainer = new Utils.QueryChainer()
chainer.add(self.getQueryInterface().dropAllSchemas())
return chainer.run()
}
Sequelize.prototype.sync = function(options) {
options = options || {}
if (this.options.sync) {
options = Utils._.extend({}, this.options.sync, options)
}
var chainer = new Utils.QueryChainer()
// Topologically sort by foreign key constraints to give us an appropriate
// creation order
this.daoFactoryManager.forEachDAO(function(dao) {
chainer.add(dao, 'sync', [options])
})
return chainer.runSerially()
}
Sequelize.prototype.drop = function() {
var self = this
return new Utils.CustomEventEmitter(function(emitter) {
var chainer = new Utils.QueryChainer
self.daoFactoryManager.daos.forEach(function(dao) { chainer.add(dao.drop()) })
chainer
.run()
.success(function() { emitter.emit('success', null) })
.error(function(err) { emitter.emit('error', err) })
}).run()
}
return Sequelize
})()