如何使用节点js更新mongodb中的文档

Question

Am trying to update some data in the mangodb database using node js but the document won't update. I get this log message { n: 0, nModified: 0, ok: 1 } Here is my code:

I connect successfully to the data

const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/cinemas')
        .then(()=> console.log('connected to mongoDB....'))
        .catch(err => console.log('Could not connect to mongoDB because',err));

Here is the schema

const moviesSchema = new mongoose.Schema({
  title: String,
  acotrs:[String],
  genre: [String],
  date: {type: Date, default: Date.now},
  onCinema :Boolean
});

Model connection

const Movie = mongoose.model('Movie',movieSchema);

I can search the database with no issues, the only issue is the update function which does not update the database. Here is the function:

async function updateMovie(id){
  const result = await Movie.update({_id: id},{
    $set:{
      title: 'New Movie',
      onCinema: false
    }
  });
  console.log(result);
}
updateMovie('5a68fdf95db93f6477053ddd'); 

I get this log on the console { n: 0, nModified: 0, ok: 1 } which tells me nothing was updated. Please help. What am I doing wrong?

Answer 1

const result = await Movie.update({_id: id},{
    $set:{
      title: 'New Movie',
      onCinema: false
    }
  });

The update function gives output like this.

{ n: 0, nModified: 0, ok: 1 }

try with the findByIdAndUpdate

const result = await Movie.findByIdAndUpdate(id,{
    $set:{
      title: 'New Movie',
      onCinema: false
    }
  });

it will give the exact results in json format.

Answer 2

The id you have given is in string type and _id is an ObjectId so adding mongoose.Types.ObjectId(id) should solve the issue.

    async function updateMovie(id){
  const result = await Movie.update({_id: mongoose.Types.ObjectId(id)},{
    $set:{
      "title": 'New Movie',
      "onCinema": false
    }
  });
  console.log(result);
}
updateMovie('5a68fdf95db93f6477053ddd');

Answer 3

Try This:

`MongoClient.connect(url, { useNewUrlParser: true }, (err, client) => { 
     let queryId = { _id: this.id }; //Get the ID of the object
     let myObj = { 
         $set: { 
           name: 'Somename' //Whatever you want to change for that ID
         }
     var db = client.db("database_name");
     db.collection("collection_name").updateOne(queryId, myObj, (err, res) => {
         if (err) {
             console.log("not Updated");
         }
         else{
            console.log("Updated");
         }
     });
}`

Let me know if you have any other questions.