var mongoose = require('mongoose');
var uniqueValidator = require('mongoose-unique-validator');
var slug = require('slug');

var QCMCategorySchema = new mongoose.Schema({
    num: number,
    name: { type: String, lowercase: true, unique: true },
    questions: []
}, {timestamps: true, toJSON: {virtuals: true}});

QCMCategorySchema.plugin(uniqueValidator, { message: 'is already taken' });

QCMCategorySchema.methods.toJSONFor = function(){
    return {
        num: this.num,
        name: this.name,
        questions: this.questions,
        createdAt: this.createdAt,
        updatedAt: this.updatedAt
    };
};

mongoose.model('QCMCategory', QCMCategorySchema);