/
array.js
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/
array.js
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/**
* Module dependencies.
*/
var EmbeddedDocument = require('./embedded');
var Document = require('../document');
var ObjectId = require('./objectid');
/**
* Mongoose Array constructor.
* Values always have to be passed to the constructor to initialize, since
* otherwise MongooseArray#push will mark the array as modified to the parent.
*
* @param {Array} values
* @param {String} key path
* @param {Document} parent document
* @api private
* @see http://bit.ly/f6CnZU
*/
function MongooseArray (values, path, doc) {
var arr = [];
arr.push.apply(arr, values);
arr.__proto__ = MongooseArray.prototype;
arr._atomics = {};
arr.validators = [];
arr._path = path;
if (doc) {
arr._parent = doc;
arr._schema = doc.schema.path(path);
}
return arr;
};
/**
* Inherit from Array
*/
MongooseArray.prototype = new Array;
/**
* Stores a queue of atomic operations to perform
*
* @api private
*/
MongooseArray.prototype._atomics;
/**
* Parent owner document
*
* @api private
*/
MongooseArray.prototype._parent;
/**
* Casts a member
*
* @api private
*/
MongooseArray.prototype._cast = function (value) {
var cast = this._schema.caster.cast
, doc = this._parent;
return cast.call(null, value, doc);
};
/**
* Marks this array as modified.
* It is called during a nonAtomicPush, an atomic opteration,
* or by an existing embedded document that is modified.
*
* If it bubbles up from an embedded document change,
* then it takes the following arguments (otherwise, takes
* 0 arguments)
* @param {EmbeddedDocument} embeddedDoc that invokes this method on the Array
* @param {String} embeddedPath is what changed inthe embeddedDoc
*
* @api public
*/
MongooseArray.prototype._markModified = function (embeddedDoc, embeddedPath) {
var parent = this._parent
, dirtyPath;
if (parent) {
if (arguments.length) {
// If an embedded doc bubbled up the change
dirtyPath = [this._path, this.indexOf(embeddedDoc), embeddedPath].join('.');
} else {
dirtyPath = this._path;
}
parent.markModified(dirtyPath);
}
return this;
};
/**
* Register an atomic operation with the parent
*
* @param {Array} operation
* @api private
*/
MongooseArray.prototype._registerAtomic = function (op, val) {
var atomics = this._atomics
if (op === '$pullAll' || op === '$pushAll' || op === '$addToSet') {
atomics[op] || (atomics[op] = []);
atomics[op] = atomics[op].concat(val);
} else if (op === '$pullDocs') {
var pullOp = atomics['$pull'] || (atomics['$pull'] = {})
, selector = pullOp['_id'] || (pullOp['_id'] = {'$in' : [] });
selector['$in'] = selector['$in'].concat(val);
} else {
atomics[op] = val;
}
this._markModified();
return this;
};
/**
* Returns true if we have to perform atomics for this, and no normal
* operations
*
* @api public
*/
MongooseArray.prototype.__defineGetter__('doAtomics', function () {
if (!(this._atomics && 'Object' === this._atomics.constructor.name)) {
return 0;
}
return Object.keys(this._atomics).length;
});
/**
* Pushes item/s to the array atomically. Overrides Array#push
*
* @param {Object} value
* @api public
*/
MongooseArray.prototype.$push =
MongooseArray.prototype.push = function () {
var values = [].map.call(arguments, this._cast, this)
, ret = [].push.apply(this, values);
// $pushAll might be fibbed (could be $push). But it makes it easier to
// handle what could have been $push, $pushAll combos
this._registerAtomic('$pushAll', values);
return ret;
};
/**
* Pushes item/s to the array non-atomically
*
* @param {Object} value
* @api public
*/
MongooseArray.prototype.nonAtomicPush = function () {
var values = [].map.call(arguments, this._cast, this)
, ret = [].push.apply(this, values);
this._markModified();
return ret;
};
/**
* Pushes several items at once to the array atomically
*
* @param {Array} values
* @api public
*/
MongooseArray.prototype.$pushAll = function (value) {
var length = this.length;
this.nonAtomicPush.apply(this, value);
// make sure we access the casted elements
this._registerAtomic('$pushAll', this.slice(length));
return this;
};
/**
* Pops the array atomically
*
* @api public
*/
MongooseArray.prototype.$pop = function () {
this._registerAtomic('$pop', 1);
return this.pop();
};
/**
* Atomically shifts the array.
*
* Only works once per doc.save(). Calling this mulitple
* times on an array before saving is the same as calling
* it once.
*
* @api public
*/
MongooseArray.prototype.$shift = function () {
this._registerAtomic('$pop', -1);
return this.shift();
};
/**
* Removes items from an array atomically
*
* Examples:
* doc.array.remove(ObjectId)
* doc.array.remove('tag 1', 'tag 2')
*
* @param {Object} value to remove
* @api public
*/
MongooseArray.prototype.remove = function () {
var args = [].map.call(arguments, this._cast, this);
if (args.length == 1)
this.$pull(args[0]);
else
this.$pullAll(args);
return args;
};
/**
* Pulls from the array
*
* @api public
*/
MongooseArray.prototype.pull =
MongooseArray.prototype.$pull = function () {
var values = [].map.call(arguments, this._cast, this)
, oldArr = this._parent.get(this._path)
, i = oldArr.length
, mem;
while (i--) {
mem = oldArr[i];
if (mem instanceof EmbeddedDocument) {
if (values.some(function (v) { return v.equals(mem); } )) {
oldArr.splice(i, 1);
}
} else if (~values.indexOf(mem)) {
oldArr.splice(i, 1);
}
}
if (values[0] instanceof EmbeddedDocument) {
this._registerAtomic('$pullDocs', values.map( function (v) { return v._id; } ));
} else {
this._registerAtomic('$pullAll', values);
}
return this;
};
/**
* Pulls many items from an array
*
* @api public
*/
MongooseArray.prototype.$pullAll = function (values) {
if (values && values.length) {
var oldArr = this._parent.get(this._path)
, i = oldArr.length, mem;
while (i--) {
mem = oldArr[i];
if (mem instanceof EmbeddedDocument) {
if (values.some( function (v) { return v.equals(mem); } )) {
oldArr.splice(i, 1);
}
} else if (~values.indexOf(mem)) oldArr.splice(i, 1);
}
if (values[0] instanceof EmbeddedDocument) {
this._registerAtomic('$pullDocs', values.map( function (v) { return v._id; } ));
} else {
this._registerAtomic('$pullAll', values);
}
}
return this;
};
/**
* Splices the array.
*
* Note: marks the _entire_ array as modified which
* will pass the entire thing to $set potentially
* overwritting any changes that happen between
* when you retrieved the object and when you save
* it.
*
* @api public
*/
MongooseArray.prototype.splice = function () {
var result = [].splice.apply(this, arguments);
this._markModified();
return result;
};
/**
* Non-atomically unshifts onto the array.
*
* Note: marks the _entire_ array as modified which
* will pass the entire thing to $set potentially
* overwritting any changes that happen between
* when you retrieved the object and when you save
* it.
*
* @api public
*/
MongooseArray.prototype.unshift = function () {
var values = [].map.call(arguments, this._cast, this);
[].unshift.apply(this, values);
this._markModified();
return this.length;
};
/**
* Adds values to the array if not already present.
* @api public
*/
MongooseArray.prototype.$addToSet =
MongooseArray.prototype.addToSet = function addToSet () {
var values = [].map.call(arguments, this._cast, this)
, added = []
, type = values[0] instanceof EmbeddedDocument ? 'doc' :
values[0] instanceof Date ? 'date' :
'';
values.forEach(function (v) {
var found;
switch (type) {
case 'doc':
found = this.some(function(doc){ return doc.equals(v) });
break;
case 'date':
var val = +v;
found = this.some(function(d){ return +d === val });
break;
default:
found = ~this.indexOf(v);
}
if (!found) {
[].push.call(this, v);
this._registerAtomic('$addToSet', v);
[].push.call(added, v);
}
}, this);
return added;
};
/**
* Returns an Array
*
* @return {Array}
* @api public
*/
MongooseArray.prototype.toObject = function (options) {
if (options && options.depopulate && this[0] instanceof Document) {
return this.map(function (doc) {
return doc._id;
});
}
return this.map(function (doc) {
return doc;
});
};
/**
* Helper for console.log
*
* @api public
*/
MongooseArray.prototype.inspect = function () {
return '[' + this.map(function (doc) {
return ' ' + doc;
}) + ' ]';
};
/**
* Return the index of `obj` or `-1.`
*
* @param {Object} obj
* @return {Number}
* @api public
*/
MongooseArray.prototype.indexOf = function indexOf (obj) {
if (obj instanceof ObjectId) obj = obj.toString();
for (var i = 0, len = this.length; i < len; ++i) {
if (obj == this[i])
return i;
}
return -1;
};
/**
* Module exports.
*/
module.exports = exports = MongooseArray;