Return ValidationChain inside a function.

[bp-adipsys]

Hello,

Sorry to bother you but i cannot find an answer for this behavior with google/stackoverflow

I've a route like :

test.post(
  '/test',
  securityMiddleware,
  testValidator,
  manageValidationErrors,
  test
);

testValidator works if it's like a contant/variable :

export const testValidator = [
  check('name')
    .notEmpty()
    .custom(async value => {
      const repository = new testRepository();
      const result = await repository.findOne({name: value});
      if (result) {
        return Promise.reject('Name already used');
      }
    }),
]

But i need to dinamically build the validator so i want to put it in a function like :

export function testValidator() {
    const validator = [
      check('name')
      .notEmpty()
      .custom(async value => {
          const repository = new testRepository();
          const result = await repository.findOne({name: value});
          if (result) {
              return Promise.reject('Name already used');
          }
      }),
    ];
    // add validator some checks dinamically

   return validator;
}

It does not work. Seems the middleware is hanging and waiting the "next function" like a classic middleware.

Do you have some hints ? Thanks !!

---

Environement :

• nodeJS : 20.5.1
• Express-validator : 7.0.1
• ExpressJs : 4.18.2

[bp-adipsys]

I can't just pass a function that return the validationChain but i can validate the chain manually and trigger the next function

export function testValidator(req, res, next) {
    const validator = [
      check('name')
      .notEmpty()
      .custom(async value => {
          const repository = new testRepository();
          const result = await repository.findOne({name: value});
          if (result) {
              return Promise.reject('Name already used');
          }
      }),
    ];
    // add validator some checks dinamically

    for(const i in validator) {
      const result = await validator[i].run(req);
    }
  next();
}