has-one.js
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var Utils = require("./../utils")
, DataTypes = require('./../data-types')
, Helpers = require("./helpers")
module.exports = (function() {
var HasOne = function(srcDAO, targetDAO, options) {
this.associationType = 'HasOne'
this.source = srcDAO
this.target = targetDAO
this.options = options
this.isSelfAssociation = (this.source.tableName == this.target.tableName)
if (this.isSelfAssociation && !this.options.foreignKey && !!this.options.as) {
this.options.foreignKey = Utils._.underscoredIf(Utils.singularize(this.options.as, this.target.options.language) + "Id", this.options.underscored)
}
this.associationAccessor = this.isSelfAssociation
? Utils.combineTableNames(this.target.tableName, this.options.as || this.target.tableName)
: this.options.as || this.target.tableName
this.options.useHooks = options.useHooks
this.accessors = {
get: Utils._.camelize('get_' + (this.options.as || Utils.singularize(this.target.tableName, this.target.options.language))),
set: Utils._.camelize('set_' + (this.options.as || Utils.singularize(this.target.tableName, this.target.options.language)))
}
}
// 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 }
Helpers.addForeignKeyConstraints(newAttributes[this.identifier], this.source, this.target, this.options)
Utils._.defaults(this.target.rawAttributes, newAttributes)
// 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) {
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 {
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
}
return self.target.find(params)
}
return this
}
HasOne.prototype.injectSetter = function(obj) {
var self = this
obj[this.accessors.set] = function(associatedObject) {
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]().success(function(oldObj) {
if (oldObj) {
oldObj[self.identifier] = null
oldObj.save([self.identifier], {allowNull: [self.identifier]}).success(function() {
if (associatedObject) {
associatedObject[self.identifier] = instance[instanceKey]
associatedObject
.save()
.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()
.success(function() { emitter.emit('success', associatedObject) })
.error(function(err) { emitter.emit('error', err) })
} else {
emitter.emit('success', null)
}
}
})
}).run()
}
return this
}
return HasOne
})()