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| /**
* Module Dependencies
*/
var normalize = require('../utils/normalize');
var schema = require('../utils/schema');
var hasOwnProperty = require('../utils/helpers').object.hasOwnProperty;
var _ = require('lodash');
/**
* DQL Adapter Normalization
*/
module.exports = {
hasJoin: function() {
var query = this._query || {};
var connName = this.connection;
Iif (connName === 'default' && query.defaultConnection) {
connName = query.defaultConnection;
}
var connection = this.query.offshore.connections[connName];
Iif (!connection) {
return false;
}
return hasOwnProperty(connection._adapter, 'join');
},
/**
* join()
*
* If `join` is defined in the adapter, Offshore will use it to optimize
* the `.populate()` implementation when joining collections within the same
* database connection.
*
* @param {[type]} criteria
* @param {Function} cb
*/
join: function(criteria, cb, metaContainer) {
// Normalize Arguments
criteria = normalize.criteria(criteria);
cb = normalize.callback(cb);
var query = this._query || {};
var connName = this.connection;
// check default connection
Iif (connName === 'default' && query.defaultConnection) {
connName = query.defaultConnection;
}
var connection = this.query.offshore.connections[connName];
// check connection
Iif (!connection) {
return cb(new Error('No valid connection specified'));
}
var adapter = connection._adapter;
// check transaction
Iif (query.transaction && query.transaction[connName]) {
connName = query.transaction[connName];
}
Iif (!hasOwnProperty(adapter, 'join')) return cb(new Error('No join() method defined in adapter!'));
// Parse Join Criteria and set references to any collection tableName properties.
// This is done here so that everywhere else in the codebase can use the collection identity.
criteria = schema.serializeJoins(criteria, this.query.offshore.schema);
adapter.join(connName, this.collection, criteria, cb, metaContainer);
},
/**
* create()
*
* Create one or more models.
*
* @param {[type]} values [description]
* @param {Function} cb [description]
* @return {[type]} [description]
*/
create: function(values, cb, metaContainer) {
var globalId = this.query.globalId;
// Normalize Arguments
cb = normalize.callback(cb);
Iif (Array.isArray(values)) {
return this.createEach.call(this, values, cb, metaContainer);
}
// Build Default Error Message
var err = 'No create() method defined in adapter!';
var query = this._query || {};
var connName = this.connection;
// check default connection
Iif (connName === 'default' && query.defaultConnection) {
connName = query.defaultConnection;
}
var connection = this.query.offshore.connections[connName];
// check connection
Iif (!connection) {
return cb(new Error('No valid connection specified'));
}
var adapter = connection._adapter;
// check transaction
if (query.transaction && query.transaction[connName]) {
connName = query.transaction[connName];
}
Iif (!hasOwnProperty(adapter, 'create')) return cb(new Error(err));
adapter.create(connName, this.collection, values, normalize.callback(function afterwards(err, createdRecord) {
if (err) {
Eif (typeof err === 'object') err.model = globalId;
return cb(err);
}
else return cb(null, createdRecord);
}), metaContainer);
},
/**
* find()
*
* Find a set of models.
*
* @param {[type]} criteria [description]
* @param {Function} cb [description]
* @return {[type]} [description]
*/
find: function(criteria, cb, metaContainer) {
// Normalize Arguments
criteria = normalize.criteria(criteria);
cb = normalize.callback(cb);
var query = this._query || {};
var connName = this.connection;
// check default connection
Iif (connName === 'default' && query.defaultConnection) {
connName = query.defaultConnection;
}
var connection = this.query.offshore.connections[connName];
// check connection
Iif (!connection) {
return cb(new Error('No valid connection specified'));
}
var adapter = connection._adapter;
// check transaction
Iif (query.transaction && query.transaction[connName]) {
connName = query.transaction[connName];
}
Iif (!adapter.find) return cb(new Error('No find() method defined in adapter!'));
adapter.find(connName, this.collection, criteria, cb, metaContainer);
},
/**
* findOne()
*
* Find exactly one model.
*
* @param {[type]} criteria [description]
* @param {Function} cb [description]
* @return {[type]} [description]
*/
findOne: function(criteria, cb, metaContainer) {
// make shallow copy of criteria so original does not get modified
criteria = _.clone(criteria);
// Normalize Arguments
cb = normalize.callback(cb);
// Build Default Error Message
var err = '.findOne() requires a criteria. If you want the first record try .find().limit(1)';
// If no criteria is specified or where is empty return an error
Iif (!criteria || criteria.where === null) return cb(new Error(err));
var query = this._query || {};
var connName = this.connection;
// check default connection
Iif (connName === 'default' && query.defaultConnection) {
connName = query.defaultConnection;
}
var connection = this.query.offshore.connections[connName];
// check connection
Iif (!connection) {
return cb(new Error('No valid connection specified'));
}
var adapter = connection._adapter;
Iif (hasOwnProperty(adapter, 'findOne')) {
// check transaction
if (query.transaction && query.transaction[connName]) {
connName = query.transaction[connName];
}
// Normalize Arguments
criteria = normalize.criteria(criteria);
return adapter.findOne(connName, this.collection, criteria, cb, metaContainer);
}
// Fallback to use `find()` to simulate a `findOne()`
// Enforce limit to 1
criteria.limit = 1;
this.find(criteria, function(err, models) {
if (!models) return cb(err);
if (models.length < 1) return cb(err);
cb(null, models);
}, metaContainer);
},
/**
* [count description]
* @param {[type]} criteria [description]
* @param {Function} cb [description]
* @return {[type]} [description]
*/
count: function(criteria, cb, metaContainer) {
// Normalize Arguments
cb = normalize.callback(cb);
criteria = normalize.criteria(criteria);
var query = this._query || {};
var connName = this.connection;
// check default connection
Iif (connName === 'default' && query.defaultConnection) {
connName = query.defaultConnection;
}
var connection = this.query.offshore.connections[connName];
// check connection
Iif (!connection) {
return cb(new Error('No valid connection specified'));
}
var adapter = connection._adapter;
if (hasOwnProperty(adapter, 'count')) {
// check transaction
Iif (query.transaction && query.transaction[connName]) {
connName = query.transaction[connName];
}
return adapter.count(connName, this.collection, criteria, cb, metaContainer);
}
Iif (!hasOwnProperty(adapter, 'find')) {
return cb(new Error('.count() requires the adapter define either a count method or a find method'));
}
this.find(criteria, function(err, models) {
Iif (err) return cb(err);
var count = models && models.length || 0;
cb(err, count);
}, metaContainer);
},
/**
* [update description]
* @param {[type]} criteria [description]
* @param {[type]} values [description]
* @param {Function} cb [description]
* @return {[type]} [description]
*/
update: function(criteria, values, cb, metaContainer) {
var globalId = this.query.globalId;
// Normalize Arguments
cb = normalize.callback(cb);
criteria = normalize.criteria(criteria);
Iif (criteria === false) {
return cb(null, []);
} else Iif (!criteria) {
return cb(new Error('No criteria or id specified!'));
}
var query = this._query || {};
var connName = this.connection;
// check default connection
Iif (connName === 'default' && query.defaultConnection) {
connName = query.defaultConnection;
}
var connection = this.query.offshore.connections[connName];
// check connection
Iif (!connection) {
return cb(new Error('No valid connection specified'));
}
var adapter = connection._adapter;
// check transaction
Iif (query.transaction && query.transaction[connName]) {
connName = query.transaction[connName];
}
Iif (!hasOwnProperty(adapter, 'update')) return cb(new Error('No update() method defined in adapter!'));
adapter.update(connName, this.collection, criteria, values, normalize.callback(function afterwards(err, updatedRecords) {
if (err) {
Eif (typeof err === 'object') err.model = globalId;
return cb(err);
}
return cb(null, updatedRecords);
}), metaContainer);
},
/**
* [destroy description]
* @param {[type]} criteria [description]
* @param {Function} cb [description]
* @return {[type]} [description]
*/
destroy: function(criteria, cb, metaContainer) {
// Normalize Arguments
cb = normalize.callback(cb);
criteria = normalize.criteria(criteria);
var query = this._query || {};
var connName = this.connection;
// check default connection
Iif (connName === 'default' && query.defaultConnection) {
connName = query.defaultConnection;
}
var connection = this.query.offshore.connections[connName];
// check connection
Iif (!connection) {
return cb(new Error('No valid connection specified'));
}
var adapter = connection._adapter;
// check transaction
Iif (query.transaction && query.transaction[connName]) {
connName = query.transaction[connName];
}
Iif (!hasOwnProperty(adapter, 'destroy')) return cb(new Error('No destroy() method defined in adapter!'));
adapter.destroy(connName, this.collection, criteria, cb, metaContainer);
}
};
|