Type arguments cannot be accepted in untyped function calls.ts(2347)

My user schema in typescript includes the following interface:

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

Check out the user schema below:

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 encountered an error with typescript stating that untyped function calls may not accept type arguments on the user schema while using express and mongoose with visual studio editor.

typescriptexpressmongoosetypesmongoose-schema

Answer №1

It seems that the error is occurring at this particular line of code:

const UserSchema = new Schema<IUser>(

The error message states, 

Untyped function calls may not accept type arguments
.

  • The issue lies with the type argument specified within the generic <...>.
  • Furthermore, the problem appears to be related to the unknown nature of the Schema function (which is currently typed as any).

This indicates a potential problem with either how you are importing the Schema, or with the installation of typings for mongoose.

I recommend reviewing the mongoose - TypeScript Support documentation for assistance.

If you're unable to resolve the issue, please provide us with the following information:

  • Your method of importing Schema
  • The versions of mongoose and possibly @types/mongoose that you are using

Answer №2

Upon following Stanislas' solution, I was able to resolve the issues I was experiencing.

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 made adjustments to the imports as shown below:

import {Schema, model} from 'mongoose';

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