Question

I have a user schema with typescript, bellow is my interface

interface IUser{
  name: string;
  email: string;
  password: string;
  isAdmin: boolean;
}

And below is the user schema

const UserSchema = new Schema<IUser>(
 {
   name: {
     type: String,
     required: true,
   },
   email: {
     type: String,
     required: true,
     unique: true,
   validate: [validator.isEmail, "Please provide a valid email"],
   },
   password: {
     type: String,
     required: true,
     minlength: 8,
   },
   isAdmin: {
     type: Boolean,
     required: true,
     default: false,
   },
 },
   {
     timestamps: true,
   }
);

const UserModel = model("User", UserSchema);

module.exports = UserModel;

i get the typescript error: Untyped function calls may not accept type arguments on the user schema, in express and mongoose with editor visual studio.

Answer 1

I m assuming you re getting the error on this line:

const UserSchema = new Schema<IUser>(

As it is saying Untyped function calls may not accept type arguments.

The type argument it s referring to is the generic <...>.
The function it s referring to is Schema, meaning it doesn t know what Schema is (typed as any).

This leads me to believe that there is either something wrong with the way you re importing Schema, or with the way the typings for mongoose have been installed.

I would suggest reading mongoose - TypeScript Support.

If you cannot figure out what s going wrong, then it would help if you told us:

How you re importing Schema
What version of mongoose (and possibly @types/mongoose you re using)

Answer 2

I had the same issues, after reading Stanislas solution it fixed my problem

const mongoose = require( mongoose );
const Schema = mongoose.Schema;

interface ILink {
  discord_id: String;
  linking_code: String;
}

const LinkSchema = new Schema<ILink>({
    discord_id: {
        type: String,
        required: true,
        unique: [true,  Discord ID name must be unique ],
    },
    linking_code: {
        type: String,
        required: true,
        unique: true,
    }
});

var Link = mongoose.model( Link , LinkSchema);
module.exports = Link;

I updated the imports to this

import {Schema, model} from  mongoose ;

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