Displaying error messages on a form that uses ng-repeat in Angular

Question

Displaying error messages on a form that uses ng-repeat in Angular

I am trying to dynamically generate input fields using ng repeat in Angular, but I am encountering an issue where error messages only appear on the last element. How can I make these error messages apply to each individual element?

<form name="setPlayersForm">
  <div ng-repeat="player in rp.KillerService.getPlayers() track by $index" class="name-input">
    <input type="text"
           placeholder="Your Name"
           ng-model="player.name"
           required/>
    <a class="fa fa-trash-o" ng-if="player.newPlayer" ng-click="rp.removePlayer(player)"></a>
  </div>
  <ng-messages for="setPlayersForm.$error" ng-if="rp.submitted">
    <ng-message when="required" class="alert-box alert">This field is required</ng-message>
  </ng-messages>
</form>

javascript angularjs

Answer 1

Answer №1

When working with inputs in ng-repeat, I typically use this method. Check out the example code below:

<form name="sampleForm" novalidate>
    <div ng-repeat="item in items">
        <input type="text" name="name{{$index}}" required ng-model="item.name">
        <div ng-messages="sampleForm['name'+$index].$error">
            <div ng-message="required" class="error">This field is required</div>
        </div>

        <input type="text" name="price{{$index}}" required ng-model="item.price">
        <div ng-messages="sampleForm['price'+$index].$error">
            <div ng-message="required" class="error">This field is required</div>
        </div>
    </div>
</form>

If you have any questions or need clarification, feel free to leave a comment.

Answer 2

When working with inputs in ng-repeat, I typically use this method. Check out the example code below:

<form name="sampleForm" novalidate>
    <div ng-repeat="item in items">
        <input type="text" name="name{{$index}}" required ng-model="item.name">
        <div ng-messages="sampleForm['name'+$index].$error">
            <div ng-message="required" class="error">This field is required</div>
        </div>

        <input type="text" name="price{{$index}}" required ng-model="item.price">
        <div ng-messages="sampleForm['price'+$index].$error">
            <div ng-message="required" class="error">This field is required</div>
        </div>
    </div>
</form>

If you have any questions or need clarification, feel free to leave a comment.

Answer 3

Answer №2

The ngMessage functions like a switch case where the correct group needs to be passed to identify errors. In Angular, when creating a form, it is wrapped by the form's name and the names of its inputs, as shown below:

<form name="myForm">
  <input name="myInput">
  <input name="myInput2">
  <input name="myInput3">
</form>

Wrap it similar to this structure with respective $error for each input:

myform = {
 myInput: {
  $error:{
   //...
  }
 },
 myInput2: {
   //...
 },
 myInput3:{
   //...
 },
   //...
}

The form name should be used and not just contain the actual error of each element (should include an array with relevant data of each error). The input names must be utilized as seen in the plunkr example:

http://plnkr.co/edit/I43HTQeWZS85N55hXGfF?p=preview

HTML:

<form name="setPlayersForm">
  <div ng-repeat="player in players track by $index" class="name-input">
    <div ng-init="player.form_name='player'+player.id" ></div>
    <input type="text"
           placeholder="Your Name"
           ng-model="player.name"
           name="{{player.form_name}}"
           required/>


           <ng-messages for="setPlayersForm[player.form_name].$error" ng-if="setPlayersForm[player.form_name].$touched">
              <ng-message when="required" class="alert-box alert">This field is required</ng-message>
          </ng-messages>
  </div>
</form>

JS:

var app = angular.module('plunker', ['ngMessages']);

app.controller('MainCtrl', function($scope) {

  $scope.players = [{
    name: "jhon",
    id:1 
  },
  {
    name: "jhon1",
    id:2 
  },
  {
    name: "jhon2",
    id:3 
  },
  {
    name: "jhon3",
    id:4 
  }
    ];
});

Answer 4

The ngMessage functions like a switch case where the correct group needs to be passed to identify errors. In Angular, when creating a form, it is wrapped by the form's name and the names of its inputs, as shown below:

<form name="myForm">
  <input name="myInput">
  <input name="myInput2">
  <input name="myInput3">
</form>

Wrap it similar to this structure with respective $error for each input:

myform = {
 myInput: {
  $error:{
   //...
  }
 },
 myInput2: {
   //...
 },
 myInput3:{
   //...
 },
   //...
}

The form name should be used and not just contain the actual error of each element (should include an array with relevant data of each error). The input names must be utilized as seen in the plunkr example:

http://plnkr.co/edit/I43HTQeWZS85N55hXGfF?p=preview

HTML:

<form name="setPlayersForm">
  <div ng-repeat="player in players track by $index" class="name-input">
    <div ng-init="player.form_name='player'+player.id" ></div>
    <input type="text"
           placeholder="Your Name"
           ng-model="player.name"
           name="{{player.form_name}}"
           required/>


           <ng-messages for="setPlayersForm[player.form_name].$error" ng-if="setPlayersForm[player.form_name].$touched">
              <ng-message when="required" class="alert-box alert">This field is required</ng-message>
          </ng-messages>
  </div>
</form>

JS:

var app = angular.module('plunker', ['ngMessages']);

app.controller('MainCtrl', function($scope) {

  $scope.players = [{
    name: "jhon",
    id:1 
  },
  {
    name: "jhon1",
    id:2 
  },
  {
    name: "jhon2",
    id:3 
  },
  {
    name: "jhon3",
    id:4 
  }
    ];
});

Answer 5

Answer №3

When using ng-form, it is important to follow these steps:

Place the form name at the same level as ng-repeat.
Assign the name attribute to your controls.

Refer to the ng-message with formName.controlName.$error.

<div ng-form="setPlayersForm" ng-repeat="player in rp.KillerService.getPlayers() track by $index" class="name-input">
    <input type="text" name="playerName"
       placeholder="Your Name"
       ng-model="player.name"
       required/>
    <a class="fa fa-trash-o" ng-if="player.newPlayer" ng-click="rp.removePlayer(player)"></a>

    <ng-messages for="setPlayersForm.playerName.$error" ng-if="rp.submitted">
        <ng-message when="required" class="alert-box alert">This field is required</ng-message>
    </ng-messages>
</div>

Answer 6

When using ng-form, it is important to follow these steps:

Place the form name at the same level as ng-repeat.
Assign the name attribute to your controls.

Refer to the ng-message with formName.controlName.$error.

<div ng-form="setPlayersForm" ng-repeat="player in rp.KillerService.getPlayers() track by $index" class="name-input">
    <input type="text" name="playerName"
       placeholder="Your Name"
       ng-model="player.name"
       required/>
    <a class="fa fa-trash-o" ng-if="player.newPlayer" ng-click="rp.removePlayer(player)"></a>

    <ng-messages for="setPlayersForm.playerName.$error" ng-if="rp.submitted">
        <ng-message when="required" class="alert-box alert">This field is required</ng-message>
    </ng-messages>
</div>

Displaying error messages on a form that uses ng-repeat in Angular

Answer №1

Answer №2

Answer №3

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