const removeMostLovedCityValidator = () => {
  return object({
    set: object({
      _id: objectIdValidation,
      lovedCity: objectIdValidation,
    }),
    get: coreApp.schemas.selectStruct("user", 1),
  });
};
const removeMostLovedCity: ActFn = async (body) => {
const { lovedCity, _id } = body.details.set;

  return await users.removeRelation({
    filters: { _id: new ObjectId(_id) },
    projection: body.details.get,
    relations: {
      mostLovedCity: {
        _ids: new ObjectId(lovedCity),
        relatedRelations: {
          lovedByUser: true,
        },
      },
    },
  });
  
};
coreApp.acts.setAct({
  schema: "user",
  actName: "removeMostLovedCity",
  validator: removeMostLovedCityValidator(),
  fn: removeMostLovedCity,
});
  
  

    
      {
        body: {
          _id: 65a3d561b7f33fd5950b932e,
          name: Erfan Gholami,
          age: 22,
          livedCities: [
            {
              _id: 65a3d560b7f33fd5950b931f,
              name: Tehran,
              population: 50,
              abb: TH
            },
            {
              _id: 65a3d560b7f33fd5950b9320,
              name: Kerman,
              population: 12,
              abb: KM
            }
          ],
          country: {
            _id: 65a3d55fb7f33fd5950b9312,
            name: Iran,
            population: 15000000,
            abb: IRI
          },
          mostLovedCity: {}
        },
        success: true
      }