Enforce file selection using AngularJS based on certain conditions

Question

Enforce file selection using AngularJS based on certain conditions

When data is received from the backend in JSON format, it looks like this:

{
  "data":{
    "xyz":[
      {
        "number":"1",
        "short_text":"Sign Contract",
        "long_text":"Enter names after contract signing",
        "is_photo":false
      },
      {
        "number":"2",
        "short_text":"Inform HR",
        "long_text":"HR has its own workflows",
        "is_photo":true
      }
    ]
  }
}

In the HTML code, a form is populated using ng-repeat:

<tr data-ng-repeat="choice in choices track by $index">
    <td>{{choice.number}}</td>
    <td><p>{{choice.short_text}}</p></td>
    <td><input type="textbox" size="50" class="des-textinput" ng-model="choice.desc" required></td>
    <td><input type="checkbox" ng-model="choice.include"></td>
    <td><input type="file" id="abc{{$index}}" class="photo-upload"
               file-model="pic{{$index}}" accept="image/*">
    </td>
</tr>

The goal is to make the input type file required if is_photo is true in the received JSON. If is_photo is false, then it will not be required.

Based on the given JSON, the first input file will not be required because the value of is_photo for the first row is false, while the second one will be required as the value is true.

To achieve this, additional conditional checks need to be implemented in the AngularJS code.

javascript angularjs

Answer 1

Answer №1

To ensure a field is required in AngularJS, you can utilize the "ng-required" directive.

If you need further information or guidance, refer to this documentation: https://docs.angularjs.org/api/ng/directive/ngRequired

Here are some examples on how to use it:

<input name="myInput" ng-model="myInput" ng-required="myVar == 2">

//If photo is true required will be true else false
<input name="myInput" ng-model="myInput" ng-required="_photo">

<input name="myInput" ng-model="myInput" ng-required="choice.is_photo">

//Or use some function which returns boolean
<input name="myInput" ng-model="myInput" ng-required="isRequired(choice)">

//Demonstration with form and preventing submission if not valid    
<form ng-app="myApp" ng-controller="validateCtrl"
      ng-init="isRequired=true"
      name="myForm" novalidate ng-submit="myForm.$valid && submit()">
        Username: <input type="text" name="user" ng-model="user" 
                         ng-required="isRequired">
        Email : <input type="email" name="email" ng-model="email" required>
        <input type="submit" ng-click="isRequired=!isRequired;" />
</form>

    <script>
       var app = angular.module('myApp', []);
       app.controller('validateCtrl', function($scope) {
           $scope.user = 'John Doe';
           $scope.email = '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="cca6a3a4a2e2a8a3a98caba1ada5a0e2afa3a1">[email protected]</a>';
           $scope.submit = () => {console.log("s");}
       });
    </script>

Answer 2

To ensure a field is required in AngularJS, you can utilize the "ng-required" directive.

If you need further information or guidance, refer to this documentation: https://docs.angularjs.org/api/ng/directive/ngRequired

Here are some examples on how to use it:

<input name="myInput" ng-model="myInput" ng-required="myVar == 2">

//If photo is true required will be true else false
<input name="myInput" ng-model="myInput" ng-required="_photo">

<input name="myInput" ng-model="myInput" ng-required="choice.is_photo">

//Or use some function which returns boolean
<input name="myInput" ng-model="myInput" ng-required="isRequired(choice)">

//Demonstration with form and preventing submission if not valid    
<form ng-app="myApp" ng-controller="validateCtrl"
      ng-init="isRequired=true"
      name="myForm" novalidate ng-submit="myForm.$valid && submit()">
        Username: <input type="text" name="user" ng-model="user" 
                         ng-required="isRequired">
        Email : <input type="email" name="email" ng-model="email" required>
        <input type="submit" ng-click="isRequired=!isRequired;" />
</form>

    <script>
       var app = angular.module('myApp', []);
       app.controller('validateCtrl', function($scope) {
           $scope.user = 'John Doe';
           $scope.email = '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="cca6a3a4a2e2a8a3a98caba1ada5a0e2afa3a1">[email protected]</a>';
           $scope.submit = () => {console.log("s");}
       });
    </script>

Answer 3

Answer №2

when employing this technique

it is automatically configured to be necessary if _photo is set to true

<input name="myInput" ng-model="myInput" ng-required="_photo">

Answer 4

when employing this technique

it is automatically configured to be necessary if _photo is set to true

<input name="myInput" ng-model="myInput" ng-required="_photo">

Answer 5

Answer №3

To enforce mandatory file upload, utilize the ng-required attribute. For more information, visit the ng-required documentation

<input type="file" id="abc{{$index}}" class="photo-upload"
       file-model="pic{{$index}}" accept="image/*"
       ng-required="choice.is_photo == true" />

Answer 6

To enforce mandatory file upload, utilize the ng-required attribute. For more information, visit the ng-required documentation

<input type="file" id="abc{{$index}}" class="photo-upload"
       file-model="pic{{$index}}" accept="image/*"
       ng-required="choice.is_photo == true" />

Enforce file selection using AngularJS based on certain conditions

Answer №1

Answer №2

Answer №3

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