has-many-double-linked.js
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'use strict';
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, queryOptions) {
var self = this
, through = self.association.through
, 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)
);
});
}
}
return self.association.target.findAllJoin([through.getTableName(), through.name], options, queryOptions);
};
HasManyDoubleLinked.prototype.injectSetter = function(oldAssociations, newAssociations, defaultAttributes) {
var self = this
, 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 = {}
, promises = []
, unassociatedObjects;
if ((defaultAttributes || {}).transaction instanceof Transaction) {
options.transaction = defaultAttributes.transaction;
defaultAttributes = Utils._.omit(defaultAttributes, 'transaction'); // Don't try to insert the transaction as an attribute in the through table
}
unassociatedObjects = newAssociations.filter(function(obj) {
return !Utils._.find(oldAssociations, function(old) {
return (!!obj[foreignIdentifier] ? obj[foreignIdentifier] === old[foreignIdentifier] : (!!obj[targetKeys[0]] ? obj[targetKeys[0]] === old[targetKeys[0]] : obj.id === old.id));
});
});
oldAssociations.forEach(function(old) {
var newObj = Utils._.find(newAssociations, function(obj) {
return (!!obj[foreignIdentifier] ? obj[foreignIdentifier] === old[foreignIdentifier] : (!!obj[targetKeys[0]] ? obj[targetKeys[0]] === old[targetKeys[0]] : 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[sourceKeys[0]] || self.instance.id;
changedAssociation.where[foreignIdentifier] = newObj[targetKeys[0]] || 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;
promises.push(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;
});
promises.push(self.association.through.bulkCreate(bulk, options));
}
if (changedAssociations.length > 0) {
changedAssociations.forEach(function(assoc) {
promises.push(self.association.through.update(assoc.attributes, assoc.where, options));
});
}
return Utils.Promise.all(promises);
};
HasManyDoubleLinked.prototype.injectAdder = function(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) {
return targetAssociation.through.update(attributes, where, options);
} else {
return Utils.Promise.resolve();
}
} else {
attributes = Utils._.defaults(attributes, newAssociation[targetAssociation.through.name], additionalAttributes);
return this.association.through.create(attributes, options);
}
};
return HasManyDoubleLinked;
})();