How to know which field is invalid in knockout validation?

Question

I have a rather big knockout model and I want to validate all nested models in it:

self.errors = ko.validation.group(self, { deep: true });

Validator found an error:

> self.errors()
["This field is required."]

I don't know which field of my huge model is invalid. How can I find out it?

Answer 1

I guess you should be looking for something like this

// Getting errors
var errors = ko.validation.group(this, {
    deep: true,
    observable: false
});

// New method: getting extended details
var details = errors.getDetails();

for (var i = 0; i < details.length; i++) {
    var d = details[i];

    /*
        Every element contains the following fields:

        "observable" - a reference to the target observable.
        "error" - the error message.
        "rule" - the name of the failed validation rule.
        "data" - an object that contains extension data (provided via "extend" method) for every rule. E.g. "data.required == true".
    */
}

PS: You need to add few lines in your validation file to make getDetails() work i.e which may not be there in validation script file you have .(check reference link & check code)

Reference Here and credits to volpav it helped me long back .

Just incase if someone looking for working sample check here