model-definition.js
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var Utils = require("./utils")
, Model = require("./model")
, QueryGenerator = require("./query-generator")
, DataTypes = require("./data-types")
var ModelDefinition = module.exports = function(name, attributes, options) {
var self = this
this.options = options || {}
this.options.timestamps = this.options.hasOwnProperty('timestamps') ? this.options.timestamps : true
this.name = name
this.tableName = this.options.freezeTableName ? name : Utils.pluralize(name)
this.attributes = Utils.simplifyAttributes(attributes)
this.modelManager = null // defined by model-manager during addModel
this.associations = {}
this.addDefaultAttributes()
}
Utils.addEventEmitter(ModelDefinition)
ModelDefinition.prototype.addDefaultAttributes = function() {
var defaultAttributes = {id: {type: DataTypes.INTEGER, allowNull: false, primaryKey: true, autoIncrement: true}}
, self = this
if(this.hasPrimaryKeys) defaultAttributes = {}
if(this.options.timestamps) {
defaultAttributes[Utils._.underscoredIf('createdAt', this.options.underscored)] = {type: DataTypes.DATE, allowNull: false}
defaultAttributes[Utils._.underscoredIf('updatedAt', this.options.underscored)] = {type: DataTypes.DATE, allowNull: false}
if(this.options.paranoid)
defaultAttributes[Utils._.underscoredIf('deletedAt', this.options.underscored)] = {type: DataTypes.DATE}
}
defaultAttributes = Utils.simplifyAttributes(defaultAttributes)
Utils._.map(defaultAttributes, function(value, attr) { self.attributes[attr] = value })
}
ModelDefinition.prototype.query = function() {
var args = Utils._.map(arguments, function(arg, _) { return arg })
, s = this.modelManager.sequelize
// add this as the second argument
if(arguments.length == 1) args.push(this)
return s.query.apply(s, args)
}
ModelDefinition.prototype.sync = function(options) {
options = options || {}
var self = this
var doQuery = function() {
self.query(QueryGenerator.createTableQuery(self.tableName, self.attributes))
.on('success', function() { self.emit('success', self) })
.on('failure', function() { self.emit('failure', self) })
}
if(options.force) this.drop().on('success', function() { doQuery() })
else doQuery()
return this
}
ModelDefinition.prototype.drop = function() {
return this.query(QueryGenerator.dropTableQuery(this.tableName, this.id))
}
ModelDefinition.prototype.__defineGetter__('all', function() {
return this.query(QueryGenerator.selectQuery(this.tableName))
})
ModelDefinition.prototype.findAll = function(options) {
return this.query(QueryGenerator.selectQuery(this.tableName, options))
}
ModelDefinition.prototype.find = function(options) {
// options is not a hash but an id
if(typeof options == 'number')
options = {where: options}
else if (Utils.argsArePrimaryKeys(arguments, this.primaryKeys)) {
var where = {}
, self = this
Utils._.each(arguments, function(arg, i) {
var key = Utils._.keys(self.primaryKeys)[i]
where[key] = arg
})
options = {where: where}
} else if((options == null) || (options == undefined)) {
var NullEmitter = require("./null-emitter")
return new NullEmitter()
}
options.limit = 1
var query = QueryGenerator.selectQuery(this.tableName, options)
return this.query(query, this, {plain: true})
}
ModelDefinition.prototype.build = function(values) {
var instance = new Model(values, Utils._.extend(this.options, {hasPrimaryKeys: this.hasPrimaryKeys}))
, self = this
instance.definition = this
Utils._.map(this.attributes, function(definition, name) {
if(typeof instance[name] == 'undefined') {
instance[name] = null
instance.addAttribute(name, null)
}
})
Utils._.each(this.associations, function(association, associationName) {
association.injectGetter(instance)
association.injectSetter(instance)
})
return instance
}
ModelDefinition.prototype.create = function(values) {
return this.build(values).save()
}
ModelDefinition.prototype.__defineGetter__('primaryKeys', function() {
var result = {}
Utils._.each(this.attributes, function(dataTypeString, attributeName) {
if((attributeName != 'id') && (dataTypeString.indexOf('PRIMARY KEY') > -1))
result[attributeName] = dataTypeString
})
return result
})
ModelDefinition.prototype.__defineGetter__('primaryKeyCount', function() {
return Utils._.keys(this.primaryKeys).length
})
ModelDefinition.prototype.__defineGetter__('hasPrimaryKeys', function() {
return this.primaryKeyCount > 0
})
Utils._.map(require("./associations/mixin").classMethods, function(fct, name) { ModelDefinition.prototype[name] = fct })