toObject sails

test.js

 Model
      .findOne(parentPk) //type app
      .populate(relation, { //populate categories
        where: where
      })
      .exec(function found(err, matchingRecord) {
        //get list of all category id
        var categoryModel = req._sails.models['category'];
        var categoryIds = _.flatten(matchingRecord.categories,"id");
        var categoryQuery = categoryModel.find({
          id:categoryIds
        })
        .populate('tags');
        categoryQuery.exec(function (err, matchingCategories){
          var temp = matchingRecord.toObject();
          temp.categories=matchingCategories;

          console.log("------temp Log--------")
          console.log(temp); // good temp.categories includes tags

          matchingRecord.categories = matchingCategories;
          console.log("------App Log--------")
          console.log(matchingRecord); //matchingRecord.categories doesn't include tags
          console.log("------Categories Log------")
          console.log(matchingRecord.categories); //outputs tags