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/*!
* Module dependencies
*/
var utils = require('./utils');
/*!
* Prepare a set of path options for query population.
*
* @param {Query} query
* @param {Object} options
* @return {Array}
*/
exports.preparePopulationOptions = function preparePopulationOptions(query, options) {
var pop = utils.object.vals(query.options.populate);
// lean options should trickle through all queries
if (options.lean) pop.forEach(makeLean);
return pop;
};
/*!
* Prepare a set of path options for query population. This is the MongooseQuery
* version
*
* @param {Query} query
* @param {Object} options
* @return {Array}
*/
exports.preparePopulationOptionsMQ = function preparePopulationOptionsMQ(query, options) {
var pop = utils.object.vals(query._mongooseOptions.populate);
// lean options should trickle through all queries
if (options.lean) pop.forEach(makeLean);
return pop;
};
/*!
* If the document is a mapped discriminator type, it returns a model instance for that type, otherwise,
* it returns an instance of the given model.
*
* @param {Model} model
* @param {Object} doc
* @param {Object} fields
*
* @return {Model}
*/
exports.createModel = function createModel(model, doc, fields) {
var discriminatorMapping = model.schema
? model.schema.discriminatorMapping
: null;
var key = discriminatorMapping && discriminatorMapping.isRoot
? discriminatorMapping.key
: null;
if (key && doc[key] && model.discriminators && model.discriminators[doc[key]]) {
return new model.discriminators[doc[key]](undefined, fields, true);
}
return new model(undefined, fields, true);
};
/*!
* Set each path query option to lean
*
* @param {Object} option
*/
function makeLean(option) {
option.options || (option.options = {});
option.options.lean = true;
}
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