Return ModelQueryBuilderContract<T, T>

[Marvin-S]

Hello everyone,
I'm having a piece of code that implements the template method pattern.
So I have an abstract base class that needs its child classes to provide an implementation. This concrete implementation should return either a DatabaseQueryBuilderContract or a ModelQueryBuilderContract<typeof T, T>.

To be more specific I want to get the result of something like that for example:
return User.query().where('last_active', '<', DateTime.local().minus({ days: 10 }).

This is the code I came up with:
Base class:

import { DatabaseQueryBuilderContract } from '@ioc:Adonis/Lucid/Database'
import { LucidModel, ModelQueryBuilderContract } from '@ioc:Adonis/Lucid/Orm'
import { DateTime } from 'luxon'

export default abstract class MyBaseClass<T extends LucidModel>
{
  public async deleteExpired(): {
    const deletedValues = await this.getExpiredValues().delete()
  }

  /**
   * Define which values in the table need to be deleted. Use the Lucid DatabaseQueryBuilderContract<any> or ModelQueryBuilderContract<T, T> to return the query
   */
  protected abstract getExpiredValues(): DatabaseQueryBuilderContract<any> | ModelQueryBuilderContract<T, T>
}

And this is one implementation:

import { DatabaseQueryBuilderContract } from '@ioc:Adonis/Lucid/Database'
import { ModelQueryBuilderContract } from '@ioc:Adonis/Lucid/Orm'
import User from 'App/Models/User'
import MyBaseClass from './ClearingBase'
export default class MyChildClass extends MyBaseClass<User> {
  protected getExpiredValues(): DatabaseQueryBuilderContract<any> | ModelQueryBuilderContract<User, User> {
    return User.query().where('last_active', '<', DateTime.local().minus({ days: 10 }).
  }
}

User class:

import { DateTime } from 'luxon'
import { column, BaseModel } from '@ioc:Adonis/Lucid/Orm'

export default class User extends BaseModel {
  @column({ isPrimary: true })
  public id: number

  @column()
  public firstName: string

  @column()
  public lastName: string

  @column.dateTime()
  public lastActive: DateTime
}

The error I'm facing occurs in the implementation class 'MyChildClass': Type 'User' does not satisfy the constraint 'LucidModel'.
Type 'User' is missing the following properties from type 'LucidModel': booted, $columnsDefinitions, $relationsDefinitions, $computedDefinitions, and 40 more.

How can I solve this problem? Any help is really appreciated!