ajax调用仅显示每个循环中第一个项目的输入值。 需要根据按钮点击的上下文显示它

Question

I am trying trying to post data to a controller based on the context of the button click in the for each loop. The response is only showing the first iteration of the loop.

@foreach($obj['questions'] as $question)
        <form class="col-md-12" id="upvote">
        <input type="hidden" value="{{$question->id}}" id="question_id" data-id="{{$question->id}}" class="form-control question_id">
        <input type="hidden" value="{{$user->id}}" id="user_id" data-id="{{$user->id}}" class="form-control user_id">
        <button class="btn btn-xs fas fa-arrow-up btn-submit" style="{{ in_array($question->id, $upvotes) ? 'color:gray' : 'color:orange' }}" {{ in_array($question->id, $upvotes) ? 'disabled' : null }}></button>
        </form>
@endforeach

And my ajax script looks like this:

<script type="text/javascript">
    $(document).ready(function(){
        $.ajaxSetup({
            headers: {
            'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
            }
        });

        $('.btn-submit').click(function(e){
        e.preventDefault(); 
        var question_id = $("input[id=question_id]").val();
        var user_id = $("input[id=user_id]").val();
            $.ajax({
                url: "{{ route('welcome.upvoteAjax') }}",
                type: 'POST',
                data: {question_id:question_id, user_id:user_id},
                dataType: 'json',
                success: function (data) {
                    console.log(data);
                }
            });
        });
    });
</script>

My route:

Route::post('/upvoteAjax', 'WelcomeController@upvoteAjax')->name('welcome.upvoteAjax');

And my controller looks like this:

public function upvoteAjax(Request $request){
   if($request->ajax()) {
      return response()->json($request);
   }
}

The response I get in console is (I attached a screenshot of the browser as well):

(index):593 {question_id: "736", user_id: "1"}
(index):593 {question_id: "736", user_id: "1"}
(index):593 {question_id: "736", user_id: "1"}

This is the output regardless of which item in the loop I click. The output that I want is the question and the user associated with the iteration of the loop that is displayed on the front end. Any feedback would be appreciated.

Thanks.

Answer 1

When you are clicking the submit button, You're fetching the value from the first field it finds example

<input id="question_id">.

A better way to solve this issue would calling the closeset elements input types to get the value:

    var question_id = $(this).closest('.question_id').val();

This will make sure the form values corresponds the input that button is submitting. Also ID is unique for each element.

here try this:

let btns = document.querySelectorAll('.btn')
btns.forEach((btn) => {
    btn.addEventListener('click', function(event){
        event.preventDefault();
        let question_id =  btn.parentNode.children[0].value
        let user_id = btn.parentNode.children[1].value

        $.ajax({
                url: "{{ route('welcome.upvoteAjax') }}",
                type: 'POST',
                data: {question_id: question_id, user_id: user_id},
                dataType: 'json',
                success: function (data) {
                    console.log(data);
                }
        })

    })
  })
}