Is it possible to automatically generate the ng-model of an input based on the name of the input itself? This requirement arises from using Html.TextBoxFor in MVC, which creates the necessary name for binding the input to the server-side model. To streamline the process and minimize user error, I would like my team to simply add a directive that handles this automatically. I came across this code snippet on stackoverflow to achieve this.
datatableApp.directive('automaticangularmodelbinding', function ($compile) {
return {
restrict: 'A',
replace: false,
priority: 10000,
terminal: true, // setting terminal to true and giving it a high priority will prevent other directives from running initially
scope: {
automaticangularmodelbinding: '@@'
},
link: function (scope, element, attrs) {
attrs.$set('ngModel', (scope.automaticangularmodelbinding != '') ? (scope.automaticangularmodelbinding + '.' + attrs.name) : attrs.name); // set the value of ng-model to match the name attribute
attrs.$set('automaticangularmodelbinding', null); // remove the directive to prevent recursion
$compile(element)(scope); // start compiling other directives
}
};
});
This implementation successfully creates the ng-model with the element's name. However, when retrieving data from the server and populating the inputs, the values don't show up. If I remove the automatic directive and define ng-model manually, it works as expected.
The code snippet for fetching data from the server:
$scope.getEditStreet = function (streetID) {
$http.post('@Url.Action(Model.GetFormControllerFunctionName, Model.GetFormControllerName)', "{ @Model.JavascriptEditPropertyName : " + streetID + "}").then(function (response) {
$scope.editFormData = response.data.ResultObject;
$scope.$apply();
}, function (response) {
alert("fail" + response.statusText);
});
};
Initially, using ng-model required calling scope.apply to update checkboxes. But after switching to the automatic approach, scope.apply throws errors. Even without scope.apply, the text boxes don't populate, despite working fine before.
It appears that adding ng-model dynamically after the fact is causing issues compared to having it defined from the beginning. How can this be resolved?
Edit:
After considering zaitsman's comments, the revised version that functions properly is as follows. I removed scope from the directive and utilized attrs['automaticangularmodelbinding'] for passing the necessary data.
datatableApp.directive('automaticangularmodelbinding', function ($compile) {
return {
restrict: 'A',
replace: false,
priority: 10000,
terminal: true, // setting terminal to true and giving it a high priority will stop other directives from running initially
link: function (scope, element, attrs) {
attrs.$set('ngModel', (attrs['automaticangularmodelbinding'] != '') ? (attrs['automaticangularmodelbinding'] + '.' + attrs.name) : attrs.name); // set the value of ng-model to match the name attribute
attrs.$set('automaticangularmodelbinding', null); // remove the directive to avoid recursion
$compile(element)(scope); // begin compiling other directives
}
};
});