In order to work with Mongoose and Typescript, it is necessary for me to

I am currently following the guidelines outlined in the Mongoose documentation to incorporate TypeScript support into my project: https://mongoosejs.com/docs/typescript.html.

Within the documentation, there is an example provided as follows:

import { Schema, model, connect } from 'mongoose';

// 1. Define a MongoDB document interface.
interface User {
  name: string;
  email: string;
  avatar?: string;
}

// 2. Create a Schema based on the document interface.
const schema = new Schema<User>({
  name: { type: String, required: true },
  email: { type: String, required: true },
  avatar: String
});

// 3. Generate a Model.
const UserModel = model<User>('User', schema);

An alternative example is also presented where the interface extends Document:

interface User extends Document {
  name: string;
  email: string;
  avatar?: string;
}

The recommended approach advises against using the extension of Document. However, when attempting their suggested code (without extends), I encounter the following errors:

Type 'User' does not fulfill the constraint 'Document<any, {}>'.
  Type 'User' lacks the following properties present in 'Document<any, {}>': $getAllSubdocs, $ignore, $isDefault, $isDeleted, along with 47 more.

I am utilizing version 5.12.7 of Mongoose. Is there a concept that I may be overlooking? How can I establish the schema without extending the document? My intention is to conduct tests later on, and I wish to avoid having to mock 47 or more properties...

Answer №1

Ah, I finally solved the problem at hand. There were two hurdles to overcome. Firstly, I realized that using the external @types/mongoose package was unnecessary since Mongoose now inherently supports TypeScript.

However, the crux of the issue lied in the version discrepancy. Even though the documentation indicated support from v5.11.0 onwards, it turned out that the minor differences between the version I had installed—v5.12.7—and the latest version, which is 5.12.12, made a significant impact. Updating to the newest version resolved all the errors plaguing my code.

Answer №2

To resolve the issue, I found success in removing the package @types/mongoose and updating mongoose instead. It turns out that you no longer need @types/mongoose because mongoose now supports typescript starting from version 5.11.0.

Simply remove @types/mongoose by running:

yarn remove @types/mongoose

Then update mongoose with the following command:

yarn update mongoose

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