.js

const mongoose = require('mongoose')

let reviewSchema = mongoose.Schema({
  title : String,
  description :String,
  dishId : mongoose.Schema.ObjectId
})

const Review = mongoose.model('Review',reviewSchema)

module.exports = Review




const mongoose = require('mongoose')
const Review = require('./reviewSchema')

// defining the structore of your document
let dishSchema = mongoose.Schema({
  name : String,
  price :Number,
  imageURL :String
})

// convert the schema into a model class which you can use in your code
const Dish = mongoose.model('Dish',dishSchema)

module.exports = Dish



Dish.find({ reviews: { $type: "array", $not: { $size: 0 } } },
    function(error,dishes){
      console.log(dishes)
})



const express = require('express')
const mongoose = require('mongoose')
const Dish = require('./schemas/dishSchema')
const Review = require('./schemas/reviewSchema')
const app = express()

// connect to the database nailaskitchen
// if the database does not exist then it will create it
// make sure the mongodb server is running using mongod at terminal
mongoose.connect('mongodb://localhost/nailaskitchen')
// get the database connection object
const db = mongoose.connection

// create a dish
let dish = new Dish({ name : "Noodles with reviews", price : 10})

Review.findById('5b3a782cbe60902199755646',function(error,review){

  Dish.findById(review.dishId,function(error,dish){
    console.log(dish)
  })

})

// find the dish based on the dishId in review


/*
dish.save(function(error,newDish){
  // create a review
  let review = new Review({ title : 'new revie', description : "description", dishId : dish._id })

  review.save(function(error,newReview){
    console.log(newReview)
  })

}) */

// create a review


// get all dishes where name contains Chicken
/*
Dish.find({"name" : /.*chicken.*///i},function(error,dishes){
//  console.log(dishes)
//})



// get all dishes by reviews
/*
Dish.find({
  "reviews.length" : { $gt : 0 }
},function(error,dishes){
  console.log(dishes)
}) */



//db.users.findOne({"username" : {$regex : ".*son.*"}});

/*
dish.save(function(error,newDish){
  console.log(newDish)
}) */

/*
Dish.find(function(error,dishes){

  dishes.forEach(function(dish){
    console.log(dish.name)
    console.log(dish.reviews)
  })

})   */

/*
dish.save(function(error,newDish){
  console.log(newDish)
})*/


// get all the documents in the dishes collection

app.get('/dishes/:dishId',function(req,res){

  let dishId = req.params.dishId

  Dish.findById(dishId,function(error,dish){
    res.json(dish)
  })

})

app.get('/dishes',function(req,res){

    Dish.find(function(error,dishes){
        res.json(dishes)
    })

})


// insert a new dish
/*
let dish = new Dish({ name : "Cheese Cake", price : 5, imageURL : "imageURLOfCheeseCake" })

dish.save(function(error,newDish){
  if(error != null) {
    console.error(error)
    return
  }

  console.log(newDish)

}) */





app.listen(3000, () => console.log('Example app listening on port 3000!'))