Validating multiselect with jquery validation plugin

Question

Trying to figure out why my recipient multiselect isn\'t validating on form submission. Should be atleast 1 person chosen. I have it set to be required true but yet its stil

Answer 1

You can use the following code to validate the single selection required.

The magic happens in this line:

ignore: ':hidden:not("#mySelect")'

It's necessary because as default jQuery Validate ignores hidden fields...

HTML

    Select: 
        Some Value
        Some Other Value
    

    

Javascript/jQuery

$(document).ready(function() {
    $('#mySelect').multiselect({
        noneSelectedText: 'Select Something (required)',
        selectedList: 3,
        classes: 'my-select'
    });

    $.validator.addMethod("needsSelection", function(value, element) {
        return $(element).multiselect("getChecked").length > 0;
    });

    $.validator.messages.needsSelection = 'You gotta pick something.';

    $('#myForm').validate({
    rules: {
        mySelect: "required needsSelection",
        input1: "required isPercent",
        input2: "required",
        input3: "required"
    },
    ignore: ':hidden:not("#mySelect")', // Tells the validator to check the hidden select
    errorClass: 'invalid'
    });
});