Extending a model by an individual toString method causes Where-Filter to break

[markus-hsk]

Hi,
i want to implement an individual toString method into my model to just output it's "Name" easier.

P.e. this is how it should look like:

import {Entity, model, property} from '@loopback/repository';

@model()
export class Tag extends Entity
{
    @property({
                  type:      'number',
                  id:        true,
                  generated: true,
                  required:  false
              })
    Id?: number;

    @property({
                  type:     'string',
                  required: true
              })
    Name: string;

    constructor(data?: Partial<Tag>)
    {
        super(data);
    }

    toString()
    {
        return `Tag #${this.Id} ${this.Name}`;
    }
}

I then want to just throw it into an output like this:

const tag = new Tag({Id: 1, Name: "Test"});
console.log(`I have a new ${tag}`);  // prints "I have a new Tag #1 Test"

That is indeed working, BUT now i am facing a problem when i try to use filter on the matching repository.

const tags = await this.tagRepository.find({where: {Id: 1}}));
// error TS2322: Type '{ [prop: string]: { inq: string[] | number[]; }; }' is not assignable to type 'Where<Tag> | undefined'.

As far as i understand it, the problem is that toString is not a property but a function. But that in my opinion shouldn't be a problem. Can anyone help me out on this?