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updateValidators.js
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updateValidators.js
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/*!
* Module dependencies.
*/
var async = require('async');
var ValidationError = require('../error/validation.js');
var ObjectId = require('../types/objectid');
/**
* Applies validators and defaults to update and findOneAndUpdate operations,
* specifically passing a null doc as `this` to validators and defaults
*
* @param {Query} query
* @param {Schema} schema
* @param {Object} castedDoc
* @param {Object} options
* @method runValidatorsOnUpdate
* @api private
*/
module.exports = function(query, schema, castedDoc, options) {
var keys = Object.keys(castedDoc || {});
var updatedKeys = {};
var updatedValues = {};
var numKeys = keys.length;
var hasDollarUpdate = false;
var modified = {};
for (var i = 0; i < numKeys; ++i) {
if (keys[i].charAt(0) === '$') {
modifiedPaths(castedDoc[keys[i]], '', modified);
var flat = flatten(castedDoc[keys[i]]);
var paths = Object.keys(flat);
var numPaths = paths.length;
for (var j = 0; j < numPaths; ++j) {
var updatedPath = paths[j].replace('.$.', '.0.');
updatedPath = updatedPath.replace(/\.\$$/, '.0');
if (keys[i] === '$set' || keys[i] === '$setOnInsert') {
updatedValues[updatedPath] = flat[paths[j]];
} else if (keys[i] === '$unset') {
updatedValues[updatedPath] = undefined;
}
updatedKeys[updatedPath] = true;
}
hasDollarUpdate = true;
}
}
if (!hasDollarUpdate) {
modifiedPaths(castedDoc, '', modified);
updatedValues = flatten(castedDoc);
updatedKeys = Object.keys(updatedValues);
}
if (options && options.upsert) {
paths = Object.keys(query._conditions);
numPaths = keys.length;
for (i = 0; i < numPaths; ++i) {
var path = paths[i];
var condition = query._conditions[path];
if (condition && typeof condition === 'object') {
var conditionKeys = Object.keys(condition);
var numConditionKeys = conditionKeys.length;
var hasDollarKey = false;
for (j = 0; j < numConditionKeys; ++j) {
if (conditionKeys[j].charAt(0) === '$') {
hasDollarKey = true;
break;
}
}
if (hasDollarKey) {
continue;
}
}
updatedKeys[path] = true;
modified[path] = true;
}
if (options.setDefaultsOnInsert) {
schema.eachPath(function(path, schemaType) {
if (path === '_id') {
// Ignore _id for now because it causes bugs in 2.4
return;
}
var def = schemaType.getDefault(null, true);
if (!modified[path] && typeof def !== 'undefined') {
castedDoc.$setOnInsert = castedDoc.$setOnInsert || {};
castedDoc.$setOnInsert[path] = def;
updatedValues[path] = def;
}
});
}
}
var updates = Object.keys(updatedValues);
var numUpdates = updates.length;
var validatorsToExecute = [];
var validationErrors = [];
for (i = 0; i < numUpdates; ++i) {
(function(i) {
if (schema.path(updates[i])) {
validatorsToExecute.push(function(callback) {
schema.path(updates[i]).doValidate(
updatedValues[updates[i]],
function(err) {
if (err) {
validationErrors.push(err);
}
callback(null);
},
null);
});
}
})(i);
}
return function(callback) {
async.parallel(validatorsToExecute, function() {
if (validationErrors.length) {
var err = new ValidationError(null);
for (var i = 0; i < validationErrors.length; ++i) {
err.errors[validationErrors[i].path] = validationErrors[i];
}
return callback(err);
}
callback(null);
});
};
};
function modifiedPaths(update, path, result) {
var keys = Object.keys(update);
var numKeys = keys.length;
result = result || {};
path = path ? path + '.' : '';
for (var i = 0; i < numKeys; ++i) {
var key = keys[i];
var val = update[key];
result[path + key] = true;
if (shouldFlatten(val)) {
modifiedPaths(val, path + key, result);
}
}
return result;
}
function flatten(update, path) {
var keys = Object.keys(update);
var numKeys = keys.length;
var result = {};
path = path ? path + '.' : '';
for (var i = 0; i < numKeys; ++i) {
var key = keys[i];
var val = update[key];
if (shouldFlatten(val)) {
var flat = flatten(val, path + key);
for (var k in flat) {
result[k] = flat[k];
}
} else {
result[path + key] = val;
}
}
return result;
}
function shouldFlatten(val) {
return val &&
typeof val === 'object' &&
!(val instanceof Date) &&
!(val instanceof ObjectId);
}