Not required condition returns error message "false"

[dangelion]

Hi,
I have these conditions on a field:
minLength: 3 required: false
Example 1: If I enter two characters it correctly shows error message "must be at least 3 characters"
Example 2: Now I let the field empty but it shows error message: "false" ==> that's the issue. Here the field must be valid because it's not required

How can solve?

I validate each field with this function on event change:
function(event) { var errMsg, input, inputName, inputValue; input = $(event.currentTarget); inputName = event.currentTarget.name; inputValue = input.val(); errMsg = this.model.preValidate(inputName, inputValue); if (errMsg === "") { input.removeClass("error"); input.addClass("valid"); return input.parent(".form-group").find(".error-msg").remove(); } else { input.parent(".form-group").find(".error-msg").remove(); input.removeClass("valid"); input.addClass("error"); return input.parent(".form-group").append("<span for='" + inputName + "' class='error-msg'>" + errMsg + "</span>"); } }

[platinumazure]

Are you sure you should be comparing errMsg === ""? The only thing promised in the preValidate() contract is that falsy is returned if no validation errors are present and a truthy error object (or array) is returned if there are validation errors.

Try changing the statement to if (!errMsg) and see if that fixes your issue.

See http://thedersen.com/projects/backbone-validation/#methods/prevalidate for more information.