dbHelper

/**
 * dbHelper
 *
 * @module      :: dbHelper
 * @description :: Contains helper about database.
 */

module.exports = {

    /**
     * Merge attributes between an instance of a database model and an object of values. Useful before update a model or create one with dynamic fields.
     * @param       model {Object} Instance of a Database Model.
     * @param       data {Object} Data to
     * @param       keepUnusedFields {Array} Array of string which are the key to delete before try to add. Useful for be sure to don't update some fields if they are not set.
     * @returns     {model} Returns the model with fields updated.
     */
    merge: function(model, data, removeFields){
        removeFields = removeFields ? removeFields : false;

        // If we have fields to remove.
        if(removeFields && _.isArray(removeFields)){
            // Clean the object.
            for (var field in model){
                if(_.contains(removeFields, field)){
                    delete model[field];
                }
            }
        }

        // Update values.
        for (var field in data){
            model[field] = data[field];
        }

        return model;
    }
};