lib/associations/has-one.js
var Utils = require("./../utils")
, DataTypes = require('./../data-types')
, Helpers = require("./helpers")
, Transaction = require("../transaction")
module.exports = (function() {
var HasOne = function(srcDAO, targetDAO, options) {
this.associationType = 'HasOne'
this.source = srcDAO
this.target = targetDAO
this.options = options
this.isSingleAssociation = true
this.isSelfAssociation = (this.source.tableName == this.target.tableName)
this.as = this.options.as
if (this.isSelfAssociation && !this.options.foreignKey && !!this.as) {
this.options.foreignKey = Utils._.underscoredIf(Utils.singularize(this.as, this.target.options.language) + "Id", this.options.underscored)
}
if (this.as) {
this.isAliased = true
} else {
this.as = Utils.singularize(this.target.tableName, this.target.options.language)
}
this.associationAccessor = this.isSelfAssociation
? Utils.combineTableNames(this.target.tableName, this.as)
: this.as
this.options.useHooks = options.useHooks
this.accessors = {
get: Utils._.camelize('get_' + this.as),
set: Utils._.camelize('set_' + this.as),
create: Utils._.camelize('create_' + this.as)
}
}
// the id is in the target table
HasOne.prototype.injectAttributes = function() {
var newAttributes = {}
, sourceKeys = Object.keys(this.source.primaryKeys)
, keyType = ((this.source.hasPrimaryKeys && sourceKeys.length === 1) ? this.source.rawAttributes[sourceKeys[0]].type : DataTypes.INTEGER)
this.identifier = this.options.foreignKey || Utils._.underscoredIf(Utils.singularize(this.source.tableName, this.source.options.language) + "Id", this.options.underscored)
newAttributes[this.identifier] = { type: this.options.keyType || keyType }
Utils._.defaults(this.target.rawAttributes, newAttributes)
Helpers.addForeignKeyConstraints(this.target.rawAttributes[this.identifier], this.source, this.target, this.options)
// Sync attributes and setters/getters to DAO prototype
this.target.refreshAttributes()
return this
}
HasOne.prototype.injectGetter = function(obj) {
var self = this
, smart
obj[this.accessors.get] = function(params) {
params = Utils._.clone(params)
var primaryKeys = Object.keys(this.daoFactory.primaryKeys)
, primaryKey = primaryKeys.length === 1 ? primaryKeys[0] : 'id'
, where = {}
, id = this[primaryKey] || this.id
where[self.identifier] = id
if (!Utils._.isUndefined(params)) {
if (!Utils._.isUndefined(params.attributes)) {
params = Utils._.extend({where: where}, params)
} else if (!params.where) {
params.where = where
}
} else {
params = {where: where}
}
smart = Utils.smartWhere(params.where || [], self.target.daoFactoryManager.sequelize.options.dialect)
smart = Utils.compileSmartWhere.call(self.target, smart, self.target.daoFactoryManager.sequelize.options.dialect)
if (smart.length > 0) {
params.where = smart
}
var options = {}
if (params.transaction) {
options.transaction = params.transaction;
delete params.transaction;
}
return self.target.find(params, options)
}
return this
}
HasOne.prototype.injectSetter = function(obj) {
var self = this
obj[this.accessors.set] = function(associatedObject, options) {
var instance = this
, instanceKeys = Object.keys(instance.daoFactory.primaryKeys)
, instanceKey = instanceKeys.length === 1 ? instanceKeys[0] : 'id'
return new Utils.CustomEventEmitter(function(emitter) {
instance[self.accessors.get](options).success(function(oldObj) {
if (oldObj) {
oldObj[self.identifier] = null
oldObj
.save(
Utils._.extend({}, options, {
fields: [self.identifier],
allowNull: [self.identifier],
association: true
})
)
.success(function() {
if (associatedObject) {
associatedObject[self.identifier] = instance[instanceKey]
associatedObject
.save(options)
.success(function() { emitter.emit('success', associatedObject) })
.error(function(err) { emitter.emit('error', err) })
} else {
emitter.emit('success', null)
}
})
} else {
if (associatedObject) {
associatedObject[self.identifier] = instance[instanceKey]
associatedObject
.save(options)
.success(function() { emitter.emit('success', associatedObject) })
.error(function(err) { emitter.emit('error', err) })
} else {
emitter.emit('success', null)
}
}
})
}).run()
}
return this
}
HasOne.prototype.injectCreator = function(obj) {
var self = this
obj[this.accessors.create] = function(values, fieldsOrOptions) {
var instance = this
, options = {}
if ((fieldsOrOptions || {}).transaction instanceof Transaction) {
options.transaction = fieldsOrOptions.transaction
}
return new Utils.CustomEventEmitter(function(emitter) {
self.target
.create(values, fieldsOrOptions)
.proxy(emitter, { events: ['error', 'sql'] })
.success(function(newAssociatedObject) {
instance[self.accessors.set](newAssociatedObject, options)
.proxy(emitter)
})
}).run()
}
return this
};
return HasOne
})()