'type conversion error while executing mongoDB find
I am following official MongoDB typescript tutorial to convert my javascript
app to typescript
one. After code conversion i am facing following error:
routes/users.router.ts:15:19 - error TS2352: Conversion of type 'WithId<Document>[]' to type 'User[]' may be a mistake because neither type sufficiently overlaps with the other. If this was intentional, convert the expression to 'unknown' first.
Type 'WithId<Document>' is missing the following properties from type 'User': email, hash
15 const users = (await collections.users.find({}).toArray()) as User[];
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
routes/users.router.ts:
// External Dependencies
import express, { Request, Response } from "express";
import { ObjectId } from "mongodb";
import { collections } from "../services/database.service";
import User from "../models/user";
// Global Config
export const usersRouter = express.Router();
usersRouter.use(express.json());
// GET
usersRouter.get("/", async (_req: Request, res: Response) => {
try {
const users = (await collections.users.find({}).toArray()) as User[];
res.status(200).send(users);
} catch (error: any) {
res.status(500).send(error.message);
}
});
models/user.ts:
// External dependencies
import { ObjectId } from "mongodb";
// Class Implementation
export default class User {
constructor(
public email: string,
public hash: string,
public id?: ObjectId
) {}
}
services/database.service.ts:
import "dotenv/config";
// External Dependencies
import * as mongoDB from "mongodb";
// Global Variables
export const collections: { users?: mongoDB.Collection } = {};
// Initialize Connection
export async function connectToDatabase() {
const client: mongoDB.MongoClient = new mongoDB.MongoClient(
process.env.DB_CONN_STRING || ""
);
await client.connect();
const db: mongoDB.Db = client.db(process.env.DB_NAME);
const usersCollection: mongoDB.Collection = db.collection(
process.env.USERS_COLLECTION_NAME || ""
);
collections.users = usersCollection;
console.log(
`Successfully connected to database: ${db.databaseName} and collection: ${usersCollection.collectionName}`
);
}
index.ts:
import "dotenv/config";
import express, { Express } from "express";
import { connectToDatabase } from "./services/database.service";
import { usersRouter } from "./routes/users.router";
import cors from "cors";
const app: Express = express();
app.use(cors());
connectToDatabase()
.then(() => {
app.use("/users", usersRouter);
app.listen(process.env.SERVER_PORT, () => {
console.log(
`⚡️[server]: Server is running at https://${process.env.SERVER_DOMAIN}`
);
});
})
.catch((error: Error) => {
console.error("Database connection failed", error);
process.exit();
});
What changes are needed to the code from tutorial to fix it and avoid compile errors?
Sources
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Source: Stack Overflow
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