why MongoDB returns a CastError when I am trying to delete an Item by id? - mongodb

Question

I am trying to make the DELETE Rest API method but I get CastError.
The problem is with the id it's of type ObjectID and I made it as a number, even when I chose string I got the same error.
Error
[Nest] 15504 - 22/12/2021, 21:34:11 ERROR [ExceptionsHandler] Cast to ObjectId failed for value "{ id: '61c32ba552a7cec272037b12' }" (type Object) at path "_id" for model "City"
CastError: Cast to ObjectId failed for value "{ id: '61c32ba552a7cec272037b12' }" (type Object) at path "_id" for model "City"
at model.Query.exec (C:\Users\ouss\Desktop\coffeeit-assessment\node_modules\mongoose\lib\query.js:4594:21)
at CitiesService.deleteCity (C:\Users\ouss\Desktop\coffeeit-assessment\src\cities\cities.service.ts:46:64)
at CitiesController.deleteCity (C:\Users\ouss\Desktop\coffeeit-assessment\src\cities\cities.controller.ts:25:31)
at C:\Users\ouss\Desktop\coffeeit-assessment\node_modules\#nestjs\core\router\router-execution-context.js:38:29
at processTicksAndRejections (internal/process/task_queues.js:95:5)
at C:\Users\ouss\Desktop\coffeeit-assessment\node_modules\#nestjs\core\router\router-execution-context.js:46:28
at C:\Users\ouss\Desktop\coffeeit-assessment\node_modules\#nestjs\core\router\router-proxy.js:9:17
cities.service.ts
#Delete(':id')
async deleteCity(id) {
const result = await this.cityModel.deleteOne({ _id: id }).exec();
if (!result) {
throw new NotFoundException('Could not find city.');
}
}
cities.controller.ts
#Delete(':id')
deleteCity(#Param() id: number) {
return this.citiesService.deleteCity(id);
}
city.model.ts
import * as mongoose from 'mongoose';
export const CitySchema = new mongoose.Schema({
name: String,
weather: mongoose.SchemaTypes.Mixed,
});
export interface City {
id: number;
name: string;
weather: mongoose.Schema.Types.Mixed;
}
city.entity.ts
import { BaseEntity, Entity, Column, PrimaryGeneratedColumn } from 'typeorm';
#Entity()
export class City extends BaseEntity {
#PrimaryGeneratedColumn()
id: number;
#Column()
name: string;
#Column()
weather: any;
}

Answer 1

cities.service.ts
import { ObjectId } from 'mongodb';
...
#Delete(':id')
async deleteCity(id) {
const cityId = new ObjectId(id); // Cast id to MongoDB Object id
const result = await this.cityModel.deleteOne({ _id: cityId }).exec();
if (!result) {
throw new NotFoundException('Could not find city.');
}
}