jQuery validation not working as expected

Question

Below is my regular expression method.

 $.validator.addMethod("regex", function (element, value, regexp) {
        var re = new RegExp(regexp);
        return this.optional(element) || re.test(value);
    }, "Special Characters not permitted");

Below is my rules.

var rules = {
    cname: {
        required: true,
        minlength: 8
        //alphanumeric:true
        //regex: "/^\w+$/i"
        //uniqueCompnameName: true
    }
}

When i pass the regular expression to regex, it does not work at all.

Can you create a jsfiddle or jsbin ? A link to the plugin you're using would be nice too. — punkbit
– punkbit, Commented May 13, 2014 at 12:39

Arun P Johny · Accepted Answer · 2014-05-13 12:53:28Z

2

Try to pass the regex using a regex notation instead as a string

$.validator.addMethod("regexp", function (value, element, regexp) {
    if (typeof regexp == 'string') {
        regexp = new RegExp(regexp);
    }
    return this.optional(element) || regexp.test(value);
}, "Special Characters not permitted");

then

        name1: {
            required: true,
            regexp: '/^\w+$/'
        },
        name2: {
            required: true,
            regexp: /^\w+$/i
        }

Demo: Fiddle

answered May 13, 2014 at 12:53

Arun P Johny

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Comments

Mike Perrenoud · Accepted Answer · 2014-05-13 12:54:25Z

1

So keep in mind that \w is going to be the same as [a-zA-Z0-9_]. Now, for the Regex, you are really looking for this here:

^[A-Za-z0-9]{8,}$

Regular expression visualization

That's saying any word character with a minimum length of 8 characters.

And then finally, when passing the Regex into the function, you want to pass it like this:

regex: '^[A-Za-z0-9]{8,}$'

and then when building the RegExp you want to pass the flags as the second parameter:

var re = new RegExp(regexp, 'i');

Debuggex Demo

edited May 13, 2014 at 12:54

answered May 13, 2014 at 12:47

Mike Perrenoud

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3 Comments

theJava Over a year ago

I am actually looking for a regular expression which won't allow special characters

theJava Over a year ago

Can u just tell me, whats wrong here. regex: "^[0-9]{10,}$" when allowing only numbers.

Mike Perrenoud Over a year ago

@theJava, it doesn't appear there is anything wrong with that Regex, but if you're having problems, post a new question with all of the details.

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