Unable to retrieve MongoDB attributes or methods

Question

Unable to retrieve MongoDB attributes or methods

I'm attempting to access properties or functions within mongoose.connection in order to retrieve the DeleteMany and DropCollection methods, but I seem to be unable to do so. I am initiating the express.js server inside the mongoose connection.

mongoose
.connect(connection, {useNewUrlParser: true, useUnifiedTopology: true})
.then(() => {
    mongoose.connection.db.dropCollection('database');
    console.log('connected');
    app.listen(5000);
})
.catch((error) => {
    console.log(error);
});

What is my mistake? I have tried searching for a solution and understand that I cannot delete a collection using Mongoose, only data using MongoDb. Can someone please help me understand what I might be missing when trying to delete the collection when the server is running?

mongodb express mongoose

Answer 1

Answer №1

If you need to remove all entries using the deleteMany method in mongoose.

You must specify the model of the collection where the operation will be applied

To delete a collection entirely

MyModel.collection.drop();

Removing all entries

const mongoose = require('mongoose'); 
  
// Establishing database connection
mongoose.connect(connectionUrl, { 
    useNewUrlParser: true,
    useUnifiedTopology: true
}); 
  
// Creating MyCollection model 
const MyCollection = mongoose.model('MyCollection', { 
    prop1: { type: String }, 
    prop2: { type: Number } 
}); 
  
// Invoking the function 
MyCollection.deleteMany({}).then(function(){ 
    console.log("all records deleted"); // Successful deletion 
}).catch(function(error){ 
    console.log(error); // Deletion failed 
});

Answer 2

If you need to remove all entries using the deleteMany method in mongoose.

You must specify the model of the collection where the operation will be applied

To delete a collection entirely

MyModel.collection.drop();

Removing all entries

const mongoose = require('mongoose'); 
  
// Establishing database connection
mongoose.connect(connectionUrl, { 
    useNewUrlParser: true,
    useUnifiedTopology: true
}); 
  
// Creating MyCollection model 
const MyCollection = mongoose.model('MyCollection', { 
    prop1: { type: String }, 
    prop2: { type: Number } 
}); 
  
// Invoking the function 
MyCollection.deleteMany({}).then(function(){ 
    console.log("all records deleted"); // Successful deletion 
}).catch(function(error){ 
    console.log(error); // Deletion failed 
});

Unable to retrieve MongoDB attributes or methods

Answer №1

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