parsley.js how to trigger an error on a field with a custom error message

Question

It would be great if it was possible to do such thing as

$('input.specific-field').parsley('error', 'this is a custom error message');

...but I guess that isn't possible?

How could I achive such thing?

Answer 1

Parsley has some built-in ways of adding custom error messages.

var specificField = $('input.specific-field').parsley();
# add the error
window.ParsleyUI.addError(specificField, "myCustomError", 'this is a custom error message');
# remove the error
window.ParsleyUI.removeError(specificField, "myCustomError");

More info here: http://parsleyjs.org/doc/index.html#psly-ui-for-javascript

EDIT: This method is now deprecated (thanks to @giraff).

Answer 2

This is how I got it working for Parsley 2.8:

field.parsley().removeError('customValidationId');
field.parsley().addError('customValidationId', {message: "myCustomError"});

http://parsleyjs.org/doc/index.html#psly-ui-for-javascript

Here is a turnkey-solution that I used for showing error from AJAX to fields identified by their id:

// Removing errors from previous AJAX call
if ($('.js_error').length) {
    $('.js_error').parsley().removeError('myError');
    $('.js_error').removeClass('.js_error');
}

// Showing errors from current AJAX call
for (var idField in ajaxErrors) {
    var msg = ajaxErrors[idField];
    var field = $('#field_' + idField);
    if (field.length) {
        field.addClass('js_error');
        field.parsley().removeError('myError');
        field.parsley().addError('myError', {message: msg});
    }
}

This solution will not prevent form-submit, though (because it only displays error messages in the UI, the form validation logic is not touched). That's why Parsley.js favors custom validators.