express-restify-mt-mongoose/lib/buildQuery.js

Easily create a flexible REST interface for mongoose models

'use strict';

var Promise = require('bluebird');

module.exports = function (options) {
  return function (query, queryOptions) {
    var promise = new Promise(function (resolve, reject) {
      if (!queryOptions) {
        return resolve(query);
      }

      if (queryOptions.query) {
        query.where(queryOptions.query);
      }

      if (queryOptions.skip) {
        query.skip(queryOptions.skip);
      }

      if (options.limit && (!queryOptions.limit || queryOptions.limit === '0' || queryOptions.limit > options.limit)) {
        queryOptions.limit = options.limit;
      }

      if (queryOptions.limit && query.op !== 'count' && !queryOptions.distinct) {
        query.limit(queryOptions.limit);
      }

      if (queryOptions.sort) {
        query.sort(queryOptions.sort);
      }

      if (queryOptions.populate) {
        query.populate(queryOptions.populate);
      }

      if (queryOptions.select) {
        query.select(queryOptions.select);
      }

      if (queryOptions.distinct) {
        query.distinct(queryOptions.distinct);
      }

      if (options.readPreference) {
        query.read(options.readPreference);
      }

      if (options.lean) {
        query.lean(options.lean);
      }

      resolve(query);
    });

    return promise;
  };
};
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