has-many-double-linked.js
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var Utils = require('./../utils')
, Transaction = require('./../transaction')
module.exports = (function() {
var HasManyDoubleLinked = function(association, instance) {
this.association = association
this.instance = instance
// Alias the quoting methods for code brevity
this.QueryInterface = instance.QueryInterface
}
HasManyDoubleLinked.prototype.injectGetter = function(options) {
var self = this
, _options = options
, smart
var customEventEmitter = new Utils.CustomEventEmitter(function() {
var where = []
, through = self.association.through
, options = _options || {}
, queryOptions = {}
, targetAssociation = self.association.targetAssociation
//fully qualify
var instancePrimaryKey = self.instance.Model.primaryKeyAttribute
, foreignPrimaryKey = self.association.target.primaryKeyAttribute
options.where = new Utils.and([
new Utils.where(
through.rawAttributes[self.association.identifier],
self.instance[instancePrimaryKey]
),
new Utils.where(
through.rawAttributes[self.association.foreignIdentifier],
{
join: new Utils.literal([
self.QueryInterface.quoteTable(self.association.target.name),
self.QueryInterface.quoteIdentifier(foreignPrimaryKey)
].join('.'))
}
),
options.where
])
if (Object(targetAssociation.through) === targetAssociation.through) {
queryOptions.hasJoinTableModel = true
queryOptions.joinTableModel = through
if (!options.attributes) {
options.attributes = [
self.QueryInterface.quoteTable(self.association.target.name)+".*"
]
}
if (options.joinTableAttributes) {
options.joinTableAttributes.forEach(function (elem) {
options.attributes.push(
self.QueryInterface.quoteTable(through.name) + '.' + self.QueryInterface.quoteIdentifier(elem) + ' as ' +
self.QueryInterface.quoteIdentifier(through.name + '.' + elem, true)
)
})
} else {
Utils._.forOwn(through.rawAttributes, function (elem, key) {
options.attributes.push(
self.QueryInterface.quoteTable(through.name) + '.' + self.QueryInterface.quoteIdentifier(key) + ' as ' +
self.QueryInterface.quoteIdentifier(through.name + '.' + key, true)
)
})
}
}
self.association.target.findAllJoin([through.getTableName(), through.name], options, queryOptions)
.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, defaultAttributes) {
var self = this
, chainer = new Utils.QueryChainer()
, targetAssociation = self.association.targetAssociation
, foreignIdentifier = self.association.foreignIdentifier
, sourceKeys = Object.keys(self.association.source.primaryKeys)
, targetKeys = Object.keys(self.association.target.primaryKeys)
, obsoleteAssociations = []
, changedAssociations = []
, options = {}
, unassociatedObjects;
if ((defaultAttributes || {}).transaction instanceof Transaction) {
options.transaction = defaultAttributes.transaction
delete defaultAttributes.transaction
}
unassociatedObjects = newAssociations.filter(function (obj) {
return !Utils._.find(oldAssociations, function (old) {
return (!!obj[foreignIdentifier] && !!old[foreignIdentifier] ? obj[foreignIdentifier] === old[foreignIdentifier] : obj.id === old.id)
})
})
oldAssociations.forEach(function (old) {
var newObj = Utils._.find(newAssociations, function (obj) {
return (!!obj[foreignIdentifier] && !!old[foreignIdentifier] ? obj[foreignIdentifier] === old[foreignIdentifier] : obj.id === old.id)
})
if (!newObj) {
obsoleteAssociations.push(old)
} else if (Object(targetAssociation.through) === targetAssociation.through) {
var throughAttributes = newObj[self.association.through.name];
// Quick-fix for subtle bug when using existing objects that might have the through model attached (not as an attribute object)
if (throughAttributes instanceof self.association.through.DAO) {
throughAttributes = {};
}
var changedAssociation = {
where: {},
attributes: Utils._.defaults({}, throughAttributes, defaultAttributes)
}
changedAssociation.where[self.association.identifier] = self.instance[self.association.identifier] || self.instance.id
changedAssociation.where[foreignIdentifier] = newObj[foreignIdentifier] || newObj.id
if (Object.keys(changedAssociation.attributes).length) {
changedAssociations.push(changedAssociation)
}
}
})
if (obsoleteAssociations.length > 0) {
var foreignIds = obsoleteAssociations.map(function (associatedObject) {
return ((targetKeys.length === 1) ? associatedObject[targetKeys[0]] : associatedObject.id)
})
var where = {}
where[self.association.identifier] = ((sourceKeys.length === 1) ? self.instance[sourceKeys[0]] : self.instance.id)
where[foreignIdentifier] = foreignIds
chainer.add(self.association.through.destroy(where, options))
}
if (unassociatedObjects.length > 0) {
var bulk = unassociatedObjects.map(function(unassociatedObject) {
var attributes = {}
attributes[self.association.identifier] = ((sourceKeys.length === 1) ? self.instance[sourceKeys[0]] : self.instance.id)
attributes[foreignIdentifier] = ((targetKeys.length === 1) ? unassociatedObject[targetKeys[0]] : unassociatedObject.id)
if (Object(targetAssociation.through) === targetAssociation.through) {
attributes = Utils._.defaults(attributes, unassociatedObject[targetAssociation.through.name], defaultAttributes)
}
return attributes
})
chainer.add(self.association.through.bulkCreate(bulk, options))
}
if (changedAssociations.length > 0) {
changedAssociations.forEach(function (assoc) {
chainer.add(self.association.through.update(assoc.attributes, assoc.where, options))
})
}
chainer
.run()
.success(function() { emitterProxy.emit('success', newAssociations) })
.error(function(err) { emitterProxy.emit('error', err) })
.on('sql', function(sql) { emitterProxy.emit('sql', sql) })
}
HasManyDoubleLinked.prototype.injectAdder = function(emitterProxy, newAssociation, additionalAttributes, exists) {
var attributes = {}
, targetAssociation = this.association.targetAssociation
, foreignIdentifier = targetAssociation.identifier
, options = {}
var sourceKeys = Object.keys(this.association.source.primaryKeys);
var targetKeys = Object.keys(this.association.target.primaryKeys);
if ((additionalAttributes || {}).transaction instanceof Transaction) {
options.transaction = additionalAttributes.transaction
delete additionalAttributes.transaction
}
attributes[this.association.identifier] = ((sourceKeys.length === 1) ? this.instance[sourceKeys[0]] : this.instance.id)
attributes[foreignIdentifier] = ((targetKeys.length === 1) ? newAssociation[targetKeys[0]] : newAssociation.id)
if (exists) {
var where = attributes
attributes = Utils._.defaults({}, newAssociation[targetAssociation.through.name], additionalAttributes)
if (Object.keys(attributes).length) {
targetAssociation.through.update(attributes, where).proxy(emitterProxy)
} else {
emitterProxy.emit('success')
}
} else {
attributes = Utils._.defaults(attributes, newAssociation[targetAssociation.through.name], additionalAttributes)
this.association.through.create(attributes, options)
.success(function() { emitterProxy.emit('success', newAssociation) })
.error(function(err) { emitterProxy.emit('error', err) })
.on('sql', function(sql) { emitterProxy.emit('sql', sql) })
}
}
return HasManyDoubleLinked
})()