我怎样才能实现这个模型

Question

我该如何实现这个

[{
    "title": "pranam",
    "year": "2016",
    "rating": 9,
    "actors": [
        {
            "name": "Amir",
            "birthday": "16 Aug 1982",
            "country": "Bangladesh"
        },
        {
            "name": "Imran",
            "birthday": "15 Aug 1982",
            "country": "Bangladesh"
        }
    ]
}]

我试过这个......

模型/actors.js

const Joi = require('joi');
const mongoose = require('mongoose');


const actorSchema = new mongoose.Schema({
    name:{
        type: String,
        required: true,
        min: 5,
        max:50
     },
    birthday:{
        type: String,
        required: true
    },
    country:{
        type: String,
        required: true
    }


 });

models/movies.js

const mongoose = require('mongoose');
const Joi = require('joi');
const actorSchema = require('../models/actors');


const movieSchema = new mongoose.Schema({
    title:{
    type:String,
    required:true,
    min: 5,
    max: 50
},
year:{
    type: String,
    required: true,
    min:2,
    max:4
},
rating:{
    type: Number,
    required: true,
    min:0,
    max:10
},
actors: {
    type: actorSchema,
    required: true
}

});   

routes/movies.js

const { Movie, validate} = require('../models/movies');
const { Actor} = require('../models/actors');
const auth = require('../middleware/auth');
const router = express.Router();


router.get('/', auth, async(req, res)=>{
    const movies = await Movie
    .find({}, { _id:0, __v:0 })
    res.send(movies);
 });  

router.post('/', async(req, res)=>{
   const {error} = validate(req.body);
   if(error) return res.status(400).send(error.details[0].message)

 //May be problem is hare, But I can not solve 
 const actor = await Actor.findById(req.body.actorId);
 if(!actor) return res.status(400).send('Invalid Actors');



 let movie = new Movie({

     title: req.body.title,
     year: req.body.year,
     rating: req.body.rating,
     actors:[{
        name: actor.name,
        birthday: actor.birthday,
        country: actor.country
     }]   
 });


 try {
     movie = await movie.save();
     res.send(movie)
   } catch (ex) {
     console.log("Invalid Movie ");
   }
 });
module.exports =router;

我在邮递员中通过 POST 方法输入 {“标题”：“我讨厌爱情故事”，“评分”：“9”，“actorId”：[“5d99ac95f17917117068631b”，“5d99ad75c4edd61f98af740b”] } 这仅显示 GET api 调用输出的电影中的第一个演员数据， 如何在电影中显示更多演员数据。

Answer 1

在问题的上下文中，其他一切看起来都很好，直到在 routes/movies.js 中的这一点：

const actor = await Actor.findById(req.body.actorId);

我认为查询不正确，首先，Model.findById() 只接受一个 id 而不是一个 id 数组。其次，您在这里要做的是获取由 actorId 数组中的 id 标识的所有演员，这是一个有效的查询：

const actors = await Actor.find(
  // Filter: fetch all actors whose Id is in the array of ids provided in the request
  { _id: { $in: req.body.actorId } }, 
  // Projection: Include just the name, birthday and country in the response, if any.
  { name: 1, birthday: 1, country: 1 } 
);

您可以查看Model.find() 以获取有关如何使用其查询界面的更多信息。
上面的查询应该返回多个演员，这就是你所需要的，然后你可以用它实例化一个新的电影模型：

 new Movie({
   title: req.body.title,
   year: req.body.year,
   rating: req.body.rating,
   actors,
 });