asynchronous validationValue

[vanhumbeecka]

Question.

For example: what if you want to check username availability, can you make an asynchronous call to the server to check the availability inside the 'validationValue' element?

The code below doesn't work because Meteor.call is asynchronous. What is best practice here?

ReactiveForms.createElement({
    template: 'UserNameInput',
    validationEvent: 'keyup',
    validationValue: function(el, clean, template) {
        var v = $(el).val();
        console.log(v);
        Meteor.call('isUsernameAvailable', v, function(err, result) {
            if (err) {
                Meteor.Error('could not check username availability.');
            }
            return result;
        });
    }
});

[jonjamz]

This example might help:

https://github.com/meteortemplates/forms/blob/release/2.0.0/docs/reference/examples/form-elements/advanced/FileUploader.md

Basically you have to return this.stop and then call this.validate(/* value */).