Troubleshooting the Typescript Cannot Determine Type Error

Check out my code for testing NestJS with Mongoose in the file test.schema.ts:

@Schema({ timestamps: true })
export class Tests {
  @Prop({ required: true, index: true })
  testid: number;

  @Prop({ required: false })
  extra_id: string | number;

  @Prop({ required: false })
  points: number;
}

I encountered an error while working on this code. The error message is - "CannotDetermineTypeError: Cannot determine a type for the "Tests.extra_id" field (union/intersection/ambiguous type was used). Make sure your property is decorated with a "@Prop({ type: TYPE_HERE })" decorator." Can anyone provide guidance on how to resolve this issue?

Answer №1

Defining Dynamic Type Declaration

 @Prop({ required: false })
 extra_id: string | number;

Limitation in Mongoose for Type Declaration

@Prop({ type : String, required: false })
     extra_id: string;

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