jqGrid custom edit rule function using Ajax displays “Custom Function should return array!”

Question

I\'m using jqGrid, latest version, and when I apply a edit rule that is a custom function and perform ajax it always returns \"Custom function should always return a arr

Answer 1

Your validateCar() does not return anything because AJAX is asynchronous. And even if it was, you are returning something from a function assigned as a success handler, not from the outer validateCar() function.

When the response from your $.ajax arrives, the method returned long ago. You either have to use synchronous AJAX (kind of discouraged):

validateCar: function (value, colname) {
    var result = null;
    jQuery.ajax({
        async: false,      //this is crucial
        url: validateCarUrl,
        data: { carName: value },
        dataType: 'json',
        contentType: 'application/json; charset=utf-8',
        success: function (data) {
            if (data) {
                result = [true, '']
            } else {
                result = [false, value + ' is not a valid car'];
            }
        },
        error: function () { alert('Error trying to validate car ' + value); }
    });
    return result;
} 

or redesign your function.