Not fully sure of what I'm suppose to look at from that page, are you trying to validate the search box?

The only possibility that I see is through Angular-Validation Service which let you attach a validation/validator programmatically, but the Service doesn't currently support attaching a validator to an Angular element. The Service currently ask for an input name and it's mandatory, but your search box doesn't have any. A little bit of code refactoring might give this possibility though.

If you currently look at the Angular-Validation Service, and take a simply example which attach a new validator and we use the declaration through an object, you see that it requires the elmName (else it will throw an error), look at the following piece of code using the elmName:

// inject the validationService inside your Controller
myApp.controller('Ctrl', function ($scope, validationService) {
  // start by creating the service
  var myValidation = new validationService();

  // you can create indepent call to the validation service
  myValidation.addValidator({
    elmName: 'input2',
    debounce: 3000,
    scope: $scope,
    rules: 'numeric_signed|required'
  });

});

I could maybe refactor the code and possibly accept a new property with a new argument name, let's say ngElement and so giving this new property instead of the elmName would be acceptable. The concept would be to use the elmName or to use this new name argument of ngElement, user would need to choose one or the other (but at least 1). As for example, it might look like :

// inject the validationService inside your Controller
myApp.controller('Ctrl', function ($scope, validationService) {
  // start by creating the service
  var myValidation = new validationService();

  // you can create indepent call to the validation service
  myValidation.addValidator({
    ngElement: $scope.input2,  // pass this new argument instead of elmName, it would be 1 or the other but at least 1 of them
   // ngElement: vm.input2  // or with the ControllerAs syntax
    debounce: 3000,
    scope: $scope,
    rules: 'numeric_signed|required'
  });

});

I did not test or refactored anything yet, I only looked briefly at the code and it looks possible though I do not promise anything at this point. But please give feedback before I work on this.

add validation to custom field #57

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