Async validation never returns in loopback

Question

I have an async validation in one of my models in which I query for a related object to validate it's existence. The problem is that the request is timing out on this validation and the server never responds.

module.exports = function(Ip) {
      // Required fields
      Ip.validatesPresenceOf('server_id');

      ...

      Ip.validateAsync('server_id', isExistingServer, {
            message: 'invalid server'
      });

      function isExistingServer(err, done) {
            var ServerModel = Ip.app.models.Server;
            var self = this;
            process.nextTick(function() {
                  ServerModel.findById(self.server_id, function(e, server) {
                        console.log(_.isNull(server));// this actually prints false
                        return _.isNull(server) ? err() : done();
                  });
            });
      }
};

Hi romeo , did you find a soluton. I also experience that this hangs my process. ChecklistItem.validatesPresenceOf('checklistId', 'checklistItemCategoryId'); — Rolf, May 18 '16 at 16:48

score 3 · Answer 1 · answered Nov 05 '16 at 19:07

3

Because you need execute done(); then err();

answered Nov 05 '16 at 19:07

Ignacio Orlandini

31
4

score 2 · Answer 2 · edited Mar 05 '17 at 11:38

2

According to documentation you should call done() after err. This is the example in docs:

User.validateAsync('name', customValidator, {message: 'Bad name'});

function customValidator(err, done) {
    process.nextTick(function () {
        if (this.name === 'bad') err();
        done();
    });
});

Note that as there is no return before the call to err(), done will also be called.

edited Mar 05 '17 at 11:38

Tunaki

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answered Mar 05 '17 at 11:17

Carlos

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Async validation never returns in loopback

2 Answers2