Problem with User.remove, it says that it is not a function – Javascript

The Problem:

User.remove() is not a function when attempting to delete users before importing them in an Express.js application. The issue arises when using the ‘remove’ method without importing the appropriate Mongoose feature.

The Solutions:

Solution 1: Use deleteMany() instead of remove()

The remove() function is not available on the User model, which is a Model in Mongoose. To delete all documents from a collection, use the deleteMany() function instead.

await User.deleteMany({});

Solution

In newer versions of Mongoose, the `document.remove()` method has been deprecated. To resolve the error, replace it with either `deleteOne()` or `deleteMany()`, depending on your use case. Refer to the [Mongoose documentation on deprecations][1] for more details.

Here’s the updated code with deleteOne() method:

// ... previous code

ImportData.post(
  "/user",
  async (req, res) => {
    await User.deleteOne({});
    const importUser = await User.insertMany(users);
    res.send({ importUser });
  }
);

// ... rest of the code

Similarly, you should update the code for the /products route to use deleteMany().

Solution 3: remove() vs deleteOne()

The error message indicates that User.remove() is not recognized as a function. In Mongoose, the remove() method has been deprecated in favor of deleteOne(). Therefore, you can resolve the issue by replacing User.remove({}) with User.deleteOne({}).

Here’s the updated code:

import express from "express";
import User from "./Models/UserModel.js";
import users from "./data/users.js";
import Product from "./Models/ProductModel.js";

const ImportData = express.Router();

ImportData.post("/user", async (req, res) => {
  await User.deleteOne({});
  const importUser = await User.insertMany(users);
  res.send({ importUser });
});

ImportData.post("/products", async (req, res) => {
  await Product.deleteOne({});
  const importProducts = await Product.insertMany(products);
  res.send({ importProducts });
});

export default ImportData;

By using deleteOne() instead of remove(), you can successfully remove all existing users before importing the new ones from the users data.

Video Explanation: