The functionality of $render ceased to operate effectively with the release of angular 1.2.2, particularly in relation

Yesterday, I upgraded from angular 1.0.8 to angular 1.2.2 and encountered a problem where the $render function in the directive below is no longer firing, despite fixing other issues that arose.

Has anyone else experienced this issue before?


        directive('validFile', function (utils, $filter) {
            return {
                require: 'ngModel',
                link: function (scope, el, attrs, ngModel) {
                    
                    if(utils.isMobileAgent())
                        return;
                    var form = el.parents().find('form');
                    ngModel.$render = function () {
                        debugger;
                        if(form.hasClass('ng-pristine'))
                            return;

                        if(el.val() && el.val().length > 0){
                            ngModel.$setViewValue(el.val());
                        }

                        if(el.hasClass('ng-invalid')){
                            el.parent().addClass('ng-invalid').addClass('ng-invalid-required');
                            ngModel.$setValidity(attrs.name, false);
                            ngModel.$setPristine(attrs.name, false);
                            scope.fileMsg =  $filter('translate')('PLEASESELECT') + ' ' + $filter('translate')(attrs.name);
                            // scope.layout.showFileError = true;
                        }
                        else{
                            el.parent().removeClass('ng-invalid').removeClass('ng-invalid-required').addClass('ng-valid');
                            ngModel.$setValidity(attrs.name, true);
                        }
                    };
                    
                    el.bind('mouseover', function(){
                        if(form.hasClass('ng-dirty') && el.parent().hasClass('ng-invalid'))
                            el.removeClass('ng-pristine');
                    });
                    
                    el.bind('mouseleave', function(){
                        if(el.val() && el.val().length > 0){
                            el.addClass('ng-pristine');
                        }
                    })
                    
                    el.bind('change', function () {
                        scope.$apply(function () {
                            ngModel.$render();
                        });
                    });
                    
                    form.bind('change', function () {
                        scope.$apply(function () {
                            ngModel.$render();
                        });
                    });
                }
            };
        });
    

markup:

<input type="file" data-ng-model='model.formData.resume' name="resume" data-valid-file data-my-validate data-value-required="true">

Answer №1

To enhance the effectiveness of your directive, it is recommended to increase its priority level above 0.

For instance:

myApp.directive('validFile', function ($filter) {
   return {
     priority: 10,

Here is a detailed explanation of the issue which is linked to this ui-tinymce problem that shares similarities with yours.

In summary, this modification causes input's $render function to override your own. By elevating the priority of your directive, you effectively prioritize your $render function, as it was prior to the change in 1.2 rc3.

Answer №2

When testing this issue with angular 1.2.10 on a textbox, I found that no matter what priority I specified, the original input $render method would always override my custom $render function.

A similar problem arose in the angular-ui tinymce module, where the initial model value was not being rendered correctly. To solve this, I made some adjustments to the timeout part in the tinymce directive to ensure my $render function took priority:

var customRender = function() { // my rendering code }    
setTimeout(function () {
                      tinymce.init(options);
                      if (ngModel.$render != customRender) {
                          var originalRender = ngModel.$render;
                          ngModel.$render = function() {
                              originalRender();
                              customRender();
                          };
                  }
              });

This modification ensures that the render method is overridden after all "link" functions have been executed.

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