//Teacher.js
getAllTeachers : async function(classId, keyword){
        var result = {};
        var results = {};
        var teacher_id = {};
        var result3 = {};

        var condition2 = {
            where : { }
        }

         if(classId) condition2.where.class_id = parseInt(classId);

        sails.log(condition2);

        var list_teacher = await Teacher.find(condition2);

        for(var i in list_teacher){
            teacher_id[i] = list_teacher[i].id;
            result3[list_teacher[i].id] = list_teacher[i].class_id;
        }

        results = Object.keys(teacher_id).map(function(key){
            return '' + teacher_id[key] + '';
        });

        var condition = {
            where : {id: results},
            select : ['email', 'full_name', 'address', 'phone'],

            sort : 'full_name asc'
        }

        if(keyword) condition.where.full_name = keyword.trim();

        var list_user_teacher = await User.find(condition);

        for(var i in list_user_teacher){
            result[list_user_teacher[i].id] = list_user_teacher[i];
        }

        for(var i in result){
            result[i].class_id = result3[i];
        }

        return result;