JQuery Validation <select> min depends on other field, not working

Question

I have a select \"ArrearsLHOLocation\" that has an option \"None Selected\" with a value of -1 and all other selectable values are greater than 0.

Here is the rule d

Answer 1

A select can only be required or not. I've never seen the min rule used on a select to force the user to choose an option.

Your "None Selected" option should contain value="" and then when you declare the required rule on this, the user will be forced to select any option other than "None Selected".

<select name="list">
    <option value="">None Selected</option>
    <option value="1">option 1</option>
    <option value="2">option 2</option>
    <option value="3">option 3</option>
</select>

Then your depends parameter would simply need to return a boolean to state whether the user needs to select an option.

$('[name="list"]').rules("add", {
    required: {
        depends: function (elem) {
            return $("#check").is(":checked");
        }
    },
    messages: {
        required: "Select from the list"
    }
});

DEMO: http://jsfiddle.net/7k2zg7rv/

---

EDIT:

Since you want to keep your first option as value="-1", you'll need to create a custom rule/method using the addMethod() method that recognizes your first option as invalid.

$.validator.addMethod('select', function(value, element) {
    return (value == -1) ? false : true;
});

Updated DEMO: http://jsfiddle.net/7k2zg7rv/2/

Answer 2

Looking at jquery.validate I found that depends should only ever evaluate to true/false. So modifying the min to have [param : 0] which would have been the min when I needed it. Then changing the depends to evaluate to true when the minimum should be in effect solved this issue.

$("#ArrearsLHOLocation").rules("add", {
        min: {
            param: 0,
            depends: function (elem) {
                return $("#rbArrearsLHO[value='True']").is(":checked");
            }
        },
        messages: {
            min: "You have stated that the applicant/coapplicant have LHO arrears but you have not stated where!"
        }
    });

DEMO: FIDDLE (forked from @Sparky's previous fiddle)