has-many-double-linked.js
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var Utils = require('./../utils')
module.exports = (function() {
var HasManyDoubleLinked = function(definition, instance) {
this.__factory = definition
this.instance = instance
}
HasManyDoubleLinked.prototype.injectGetter = function(options) {
var self = this, _options = options
var customEventEmitter = new Utils.CustomEventEmitter(function() {
var where = {}, options = _options || {};
//fully qualify
where[self.__factory.connectorDAO.tableName+"."+self.__factory.identifier] = self.instance.id
var primaryKeys = Utils._.keys(self.__factory.connectorDAO.rawAttributes)
, foreignKey = primaryKeys.filter(function(pk) { return pk != self.__factory.identifier })[0]
where[self.__factory.connectorDAO.tableName+"."+foreignKey] = {join: self.__factory.target.tableName+".id"}
if (options.where) {
Utils._.each(options.where, function(value, index) {
delete options.where[index];
options.where[self.__factory.target.tableName+"."+index] = value;
});
options.where = options.where ? Utils.merge(options.where, where) : where
} else {
options.where = where;
}
self.__factory.target.findAllJoin(self.__factory.connectorDAO.tableName, options)
.on('success', function(objects) { customEventEmitter.emit('success', objects) })
.on('error', function(err){ customEventEmitter.emit('error', err) })
.on('sql', function(sql) { customEventEmitter.emit('sql', sql)})
})
return customEventEmitter.run()
}
HasManyDoubleLinked.prototype.injectSetter = function(emitterProxy, oldAssociations, newAssociations) {
var self = this
destroyObsoleteAssociations
.call(this, oldAssociations, newAssociations)
.on('sql', function(sql) { emitterProxy.emit('sql', sql) })
.error(function(err) { emitterProxy.emit('error', err) })
.success(function() {
var chainer = new Utils.QueryChainer
, association = self.__factory.target.associations[self.__factory.associationAccessor]
, foreignIdentifier = association.isSelfAssociation ? association.foreignIdentifier : association.identifier
, unassociatedObjects = newAssociations.filter(function(obj) { return !obj.equalsOneOf(oldAssociations) })
unassociatedObjects.forEach(function(unassociatedObject) {
var attributes = {}
attributes[self.__factory.identifier] = self.instance.id
attributes[foreignIdentifier] = unassociatedObject.id
chainer.add(self.__factory.connectorDAO.create(attributes))
})
chainer
.run()
.success(function() { emitterProxy.emit('success', newAssociations) })
.error(function(err) { emitterProxy.emit('error', err) })
.on('sql', function(sql) { emitterProxy.emit('sql', sql) })
})
}
// private
var destroyObsoleteAssociations = function(oldAssociations, newAssociations) {
var self = this
return new Utils.CustomEventEmitter(function(emitter) {
var chainer = new Utils.QueryChainer()
var foreignIdentifier = self.__factory.target.associations[self.__factory.associationAccessor].identifier
var obsoleteAssociations = oldAssociations.filter(function(obj) { return !obj.equalsOneOf(newAssociations) })
if(obsoleteAssociations.length === 0) {
return emitter.emit('success', null)
}
obsoleteAssociations.forEach(function(associatedObject) {
var where = {}
, primaryKeys = Utils._.keys(self.__factory.connectorDAO.rawAttributes)
, foreignKey = primaryKeys.filter(function(pk) { return pk != self.__factory.identifier })[0]
, notFoundEmitters = []
where[self.__factory.identifier] = self.instance.id
where[foreignKey] = associatedObject.id
self.__factory.connectorDAO
.find({ where: where })
.success(function(connector) {
if(connector === null) {
notFoundEmitters.push(null)
} else {
chainer.add(connector.destroy())
}
if((chainer.emitters.length + notFoundEmitters.length) === obsoleteAssociations.length) {
// found all obsolete connectors and will delete them now
chainer
.run()
.success(function() { emitter.emit('success', null) })
.error(function(err) { emitter.emit('error', err) })
.on('sql', function(sql) { emitter.emit('sql', sql) })
}
})
.error(function(err) { emitter.emit('error', err) })
.on('sql', function(sql) { emitter.emit('sql', sql) })
})
}).run()
}
return HasManyDoubleLinked
})()