documentarray.js
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/* eslint no-empty: 1 */
/*!
* Module dependencies.
*/
var ArrayType = require('./array');
var CastError = require('../error/cast');
var Document = require('../document');
var EventEmitter = require('events').EventEmitter;
var SchemaType = require('../schematype');
var discriminator = require('../services/model/discriminator');
var util = require('util');
var utils = require('../utils');
var MongooseDocumentArray;
var Subdocument;
/**
* SubdocsArray SchemaType constructor
*
* @param {String} key
* @param {Schema} schema
* @param {Object} options
* @inherits SchemaArray
* @api public
*/
function DocumentArray(key, schema, options) {
var EmbeddedDocument = _createConstructor(schema, options);
EmbeddedDocument.prototype.$basePath = key;
ArrayType.call(this, key, EmbeddedDocument, options);
this.schema = schema;
this.$isMongooseDocumentArray = true;
var fn = this.defaultValue;
if (!('defaultValue' in this) || fn !== void 0) {
this.default(function() {
var arr = fn.call(this);
if (!Array.isArray(arr)) {
arr = [arr];
}
// Leave it up to `cast()` to convert this to a documentarray
return arr;
});
}
}
/**
* This schema type's name, to defend against minifiers that mangle
* function names.
*
* @api public
*/
DocumentArray.schemaName = 'DocumentArray';
/*!
* Inherits from ArrayType.
*/
DocumentArray.prototype = Object.create(ArrayType.prototype);
DocumentArray.prototype.constructor = DocumentArray;
/*!
* Ignore
*/
function _createConstructor(schema, options) {
Subdocument || (Subdocument = require('../types/embedded'));
// compile an embedded document for this schema
function EmbeddedDocument() {
Subdocument.apply(this, arguments);
}
EmbeddedDocument.prototype = Object.create(Subdocument.prototype);
EmbeddedDocument.prototype.$__setSchema(schema);
EmbeddedDocument.schema = schema;
EmbeddedDocument.prototype.constructor = EmbeddedDocument;
EmbeddedDocument.$isArraySubdocument = true;
// apply methods
for (var i in schema.methods) {
EmbeddedDocument.prototype[i] = schema.methods[i];
}
// apply statics
for (i in schema.statics) {
EmbeddedDocument[i] = schema.statics[i];
}
for (i in EventEmitter.prototype) {
EmbeddedDocument[i] = EventEmitter.prototype[i];
}
EmbeddedDocument.options = options;
return EmbeddedDocument;
}
/*!
* Ignore
*/
DocumentArray.prototype.discriminator = function(name, schema) {
if (typeof name === 'function') {
name = utils.getFunctionName(name);
}
schema = discriminator(this.casterConstructor, name, schema);
var EmbeddedDocument = _createConstructor(schema);
EmbeddedDocument.baseCasterConstructor = this.casterConstructor;
try {
Object.defineProperty(EmbeddedDocument, 'name', {
value: name
});
} catch (error) {
// Ignore error, only happens on old versions of node
}
this.casterConstructor.discriminators[name] = EmbeddedDocument;
return this.casterConstructor.discriminators[name];
};
/**
* Performs local validations first, then validations on each embedded doc
*
* @api private
*/
DocumentArray.prototype.doValidate = function(array, fn, scope, options) {
// lazy load
MongooseDocumentArray || (MongooseDocumentArray = require('../types/documentarray'));
var _this = this;
SchemaType.prototype.doValidate.call(this, array, function(err) {
if (err) {
return fn(err);
}
var count = array && array.length;
var error;
if (!count) {
return fn();
}
if (options && options.updateValidator) {
return fn();
}
if (!array.isMongooseDocumentArray) {
array = new MongooseDocumentArray(array, _this.path, scope);
}
// handle sparse arrays, do not use array.forEach which does not
// iterate over sparse elements yet reports array.length including
// them :(
function callback(err) {
if (err) {
error = err;
}
--count || fn(error);
}
for (var i = 0, len = count; i < len; ++i) {
// sidestep sparse entries
var doc = array[i];
if (!doc) {
--count || fn(error);
continue;
}
// If you set the array index directly, the doc might not yet be
// a full fledged mongoose subdoc, so make it into one.
if (!(doc instanceof Subdocument)) {
doc = array[i] = new _this.casterConstructor(doc, array, undefined,
undefined, i);
}
// HACK: use $__original_validate to avoid promises so bluebird doesn't
// complain
if (doc.$__original_validate) {
doc.$__original_validate({__noPromise: true}, callback);
} else {
doc.validate({__noPromise: true}, callback);
}
}
}, scope);
};
/**
* Performs local validations first, then validations on each embedded doc.
*
* ####Note:
*
* This method ignores the asynchronous validators.
*
* @return {MongooseError|undefined}
* @api private
*/
DocumentArray.prototype.doValidateSync = function(array, scope) {
var schemaTypeError = SchemaType.prototype.doValidateSync.call(this, array, scope);
if (schemaTypeError) {
return schemaTypeError;
}
var count = array && array.length,
resultError = null;
if (!count) {
return;
}
// handle sparse arrays, do not use array.forEach which does not
// iterate over sparse elements yet reports array.length including
// them :(
for (var i = 0, len = count; i < len; ++i) {
// only first error
if (resultError) {
break;
}
// sidestep sparse entries
var doc = array[i];
if (!doc) {
continue;
}
// If you set the array index directly, the doc might not yet be
// a full fledged mongoose subdoc, so make it into one.
if (!(doc instanceof Subdocument)) {
doc = array[i] = new this.casterConstructor(doc, array, undefined,
undefined, i);
}
var subdocValidateError = doc.validateSync();
if (subdocValidateError) {
resultError = subdocValidateError;
}
}
return resultError;
};
/**
* Casts contents
*
* @param {Object} value
* @param {Document} document that triggers the casting
* @api private
*/
DocumentArray.prototype.cast = function(value, doc, init, prev, options) {
// lazy load
MongooseDocumentArray || (MongooseDocumentArray = require('../types/documentarray'));
var selected;
var subdoc;
var i;
var _opts = { transform: false, virtuals: false };
if (!Array.isArray(value)) {
// gh-2442 mark whole array as modified if we're initializing a doc from
// the db and the path isn't an array in the document
if (!!doc && init) {
doc.markModified(this.path);
}
return this.cast([value], doc, init, prev);
}
if (!(value && value.isMongooseDocumentArray) &&
(!options || !options.skipDocumentArrayCast)) {
value = new MongooseDocumentArray(value, this.path, doc);
if (prev && prev._handlers) {
for (var key in prev._handlers) {
doc.removeListener(key, prev._handlers[key]);
}
}
} else if (value && value.isMongooseDocumentArray) {
// We need to create a new array, otherwise change tracking will
// update the old doc (gh-4449)
value = new MongooseDocumentArray(value, this.path, doc);
}
i = value.length;
while (i--) {
if (!value[i]) {
continue;
}
var Constructor = this.casterConstructor;
if (Constructor.discriminators &&
typeof value[i][Constructor.schema.options.discriminatorKey] === 'string' &&
Constructor.discriminators[value[i][Constructor.schema.options.discriminatorKey]]) {
Constructor = Constructor.discriminators[value[i][Constructor.schema.options.discriminatorKey]];
}
// Check if the document has a different schema (re gh-3701)
if ((value[i] instanceof Document) &&
value[i].schema !== Constructor.schema) {
value[i] = value[i].toObject({ transform: false, virtuals: false });
}
if (!(value[i] instanceof Subdocument) && value[i]) {
if (init) {
if (doc) {
selected || (selected = scopePaths(this, doc.$__.selected, init));
} else {
selected = true;
}
subdoc = new Constructor(null, value, true, selected, i);
value[i] = subdoc.init(value[i]);
} else {
if (prev && (subdoc = prev.id(value[i]._id))) {
subdoc = prev.id(value[i]._id);
}
if (prev && subdoc && utils.deepEqual(subdoc.toObject(_opts), value[i])) {
// handle resetting doc with existing id and same data
subdoc.set(value[i]);
// if set() is hooked it will have no return value
// see gh-746
value[i] = subdoc;
} else {
try {
subdoc = new Constructor(value[i], value, undefined,
undefined, i);
// if set() is hooked it will have no return value
// see gh-746
value[i] = subdoc;
} catch (error) {
var valueInErrorMessage = util.inspect(value[i]);
throw new CastError('embedded', valueInErrorMessage,
value._path, error);
}
}
}
}
}
return value;
};
/*!
* Scopes paths selected in a query to this array.
* Necessary for proper default application of subdocument values.
*
* @param {DocumentArray} array - the array to scope `fields` paths
* @param {Object|undefined} fields - the root fields selected in the query
* @param {Boolean|undefined} init - if we are being created part of a query result
*/
function scopePaths(array, fields, init) {
if (!(init && fields)) {
return undefined;
}
var path = array.path + '.';
var keys = Object.keys(fields);
var i = keys.length;
var selected = {};
var hasKeys;
var key;
var sub;
while (i--) {
key = keys[i];
if (key.indexOf(path) === 0) {
sub = key.substring(path.length);
if (sub === '$') {
continue;
}
if (sub.indexOf('$.') === 0) {
sub = sub.substr(2);
}
hasKeys || (hasKeys = true);
selected[sub] = fields[key];
}
}
return hasKeys && selected || undefined;
}
/*!
* Module exports.
*/
module.exports = DocumentArray;