has-many.js
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var Utils = require("./../utils")
, DataTypes = require('./../data-types')
var HasMany = module.exports = function(srcModel, targetModel, options) {
this.source = srcModel
this.target = targetModel
this.options = options
this.accessors = {
get: Utils._.camelize('get_' + (this.options.as || this.target.tableName + 's')),
set: Utils._.camelize('set_' + (this.options.as || this.target.tableName + 's'))
}
}
// the id is in the target table
// or in an extra table which connects two tables
HasMany.prototype.injectAttributes = function() {
this.identifier = this.options.foreignKey || Utils._.underscoredIf(this.source.tableName + "Id", this.options.underscored)
if(this.target.associations.hasOwnProperty(this.source.tableName)) {
// remove the obsolete association identifier from the source
this.foreignIdentifier = this.target.associations[this.source.tableName].identifier
delete this.source.attributes[this.foreignIdentifier]
// define a new model, which connects the models
var combinedTableAttributes = {}
combinedTableAttributes[this.identifier] = {type:DataTypes.INTEGER, primaryKey: true}
combinedTableAttributes[this.foreignIdentifier] = {type:DataTypes.INTEGER, primaryKey: true}
this.connectorModel =
this.target.associations[this.source.tableName].connectorModel =
this.source.modelManager.sequelize.define(Utils.combineTableNames(this.source.tableName, this.target.tableName), combinedTableAttributes)
} else {
var newAttributes = {}
newAttributes[this.identifier] = { type: DataTypes.INTEGER }
Utils._.extend(this.target.attributes, Utils.simplifyAttributes(newAttributes))
}
return this
}
HasMany.prototype.injectGetter = function(obj) {
var self = this
obj[this.accessors.get] = function() {
if(self.connectorModel) {
var where = {}
where[self.identifier] = this.id
self.connectorModel.findAll({where: where}).on('success', function(associationObjects) {
console.log(associationObjects)
})
} else {
var where = {}
where[self.identifier] = this.id
return self.target.findAll({where: where})
}
}
return this
}
HasMany.prototype.injectSetter = function(obj) {
var self = this
obj[this.accessors.set] = function(newAssociatedObject) {
var instance = this
// define the returned customEventEmitter, which will emit the success event once everything is done
var customEventEmitter = new Utils.CustomEventEmitter(function() {
self[self.accessors.get]().on('success', function(oldAssociatedObjects) {
if(self.connectorModel) {
// destroy the old association objects
oldAssociatedObjects.forEach(function(associatedObject) {
associatedObject.destroy()
})
// create new one
newAssociatedObject.forEach(function(associatedObject) {
var attributes = {}
attributes[self.identifier] = instance.id
attributes[self.foreignIdentifier] = associatedObject.id
self.connectorModel.create(attributes)
})
customEventEmitter.emit('success', null)
} else {
// clear the old associations
oldAssociatedObjects.forEach(function(associatedObject) {
associatedObject[self.identifier] = null
associatedObject.save()
})
// set the new one
newAssociatedObject.forEach(function(associatedObject) {
associatedObject[self.identifier] = instance.id
associatedObject.save()
})
customEventEmitter.emit('success', null)
}
})
})
return customEventEmitter
}
return this
}