FindOne 无法正确比较字符串 Express 和 MongoDB

Question

I am doing a Role validation with the database using Express, express-validator and MongoDB to create a new user checking that the User Role exists in the Database.

In my route using express-validator I verify that the Role exists using findOne to be able to post a new user but even if the role is correct it always tells me that the role does not exist.

Route:

import Role from '../models/role';
import { check } from 'express-validator';


  router.post('/', 
   [
   check('role').custom( async (role = '') => {

            let roleExists = await Role.findOne( { role } );

            if ( !roleExists ) {
                throw new Error('El Rol no es válido');
            }
            
          }  ,
        ), 


    ], newUser);

Role Model

import { Schema, model } from "mongoose";

const RoleSchema = Schema (
  {
    role: {
        type: String,
        required: [true, 'El Rol es obligatorio']
    }
  }  
);

module.exports = model('Role', RoleSchema);

Attached Document in MongoDB, request with postman and postman response.

Answer 1

debugger roleExists is exist, no roleExist throw error