Learning how to use Mongoose

chineseFood.js

var mongoose = require("mongoose");
mongoose.connect("mongodb://localhost/food_app");

var foodSchema = new mongoose.Schema({
    name: String,
    taste: String,
    isGood: Boolean,
    price: Number
});

/*To use our schema definition, we need to convert our blogSchema 
into a Model we can work with. To do so,
we pass it into mongoose.model(modelName//the singular version of the model//, schema):*/
var Food = mongoose.model("Food", foodSchema);

//adding a new food to the DB(food_app)
// var Tofu = new Food({
//     name: "Mapo Tofu",
//     taste: "Spicy",
//     isGood: true,
//     price: 15
// });

// var Hotpot = new Food({
//   name: "Huoguo",
//   taste: "Spicy",
//   isGood: true,
//   price: 50
// });

// Tofu.save(function(err, food){ //a callback function; food refer to what is DB sends back
//     if(err){
//         console.log("There is an error!");
//     }else{
//         console.log("We just save a food into DB!");
//         console.log(food);
//     }
// });

// Hotpot.save(function(err, food){
//     if(err){
//         console.log("There is an error!");
//     }else{
//         console.log("We just save a food into DB!");
//         console.log(food);
//     }
// });

Food.create({
  name: "Gongbao Chicken",
  taste: "Spicy",
  isGood: true,
  price: 20
}, function(err, food){
    if(err){
        console.log("Nooo Error!!!");
    } else {
        console.log(food);
    }
});

//retrive all the data in the DB
Food.find({},function(err, foods){
    if(err){
        console.log("There is an error!!!");
    } else {
        console.log("Here are all the chinese foods");
        console.log(foods);
    }
})