Using NestJS and Mongoose to create a schema with a personalized TypeScript type

Question

Using NestJS and Mongoose to create a schema with a personalized TypeScript type

I'm struggling to devise a Mongo Schema using nestjs/mongoose decorators based on the structure of the class below:

@Schema()
export class Constraint {
  @Prop()
  reason: string;

  @Prop()
  status: Status;

  @Prop()
  time: number;
}

The challenge lies in the definition of Status, which looks like this:

export type Status = boolean | 'pending';

I'm having difficulty determining what to pass to the prop decorator for the status attribute, as I keep encountering the following error message:

Error: Cannot determine a type for the "Constraint.status" field (union/intersection/ambiguous type was used). Make sure your property is decorated with a "@Prop({ type: TYPE_HERE })" decorator

Using { type: Status } doesn't resolve the issue because Status is a type, not a Class.

typescript mongodb mongoose nestjs mongoose-schema

Answer 1

Answer №1

Dealing with a similar issue led me to the solution provided by @sven-stam on how to implement Mixed type in this context. Here is how I integrated it:


import { Prop, Schema } from '@nestjs/mongoose';
import mongoose, {
  HydratedDocument,
  Schema as MongooseSchema,
} from 'mongoose';

export type UserDocument = HydratedDocument<User>;

@Schema()
class User {
  @Prop()
  username: string

  @Prop({default: false, type: MongooseSchema.Types.Mixed })
  paid: boolean | 'waiting'
}

Answer 2

Dealing with a similar issue led me to the solution provided by @sven-stam on how to implement Mixed type in this context. Here is how I integrated it:


import { Prop, Schema } from '@nestjs/mongoose';
import mongoose, {
  HydratedDocument,
  Schema as MongooseSchema,
} from 'mongoose';

export type UserDocument = HydratedDocument<User>;

@Schema()
class User {
  @Prop()
  username: string

  @Prop({default: false, type: MongooseSchema.Types.Mixed })
  paid: boolean | 'waiting'
}

Answer 3

Answer №2

If the variable status can take on either boolean or string values, that indicates it is a mixed type. In this case, consider adjusting your data type to Mixed Data Types

Answer 4

If the variable status can take on either boolean or string values, that indicates it is a mixed type. In this case, consider adjusting your data type to Mixed Data Types

Using NestJS and Mongoose to create a schema with a personalized TypeScript type

Answer №1

Answer №2

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