I'm beginner in Ajax. I'm getting **'Undefined variable $doctor'** If I have not any record in database I got this error but It works when I delete the line starting with 'prepend' in Ajax script. Where is my problem?

**My Controller is:**

```
public function doctors(){

    $doctors = Doctor::where('polikliniks',Auth::user()->id)->orderBy('id','DESC')->get();
    return view('panel.doctors',['doctors'=>$doctors]);
}

```

**My blade is:**

```
@foreach($doctors as $doctor)
      <tr id="sid{{$doctor->id}}">    
           <input type="hidden" value="{{$doctor->id}}" name="id">                    
           <td>
                <p>{{$doctor->name}}</p>
           </td>
      </tr>
@endforeach

```

**My ajax is:**

```
  $('#doctorForm').submit(function(e){
        e.preventDefault();

        let id = $('#id').val();
        let name = $("#name").val();

        $.ajax({
            url: "{{route('add_doctorPost')}}",
            type:"POST",
            data:{id:id,name:name,_token:'{{ csrf_token() }}'},
            success:function(response){
                if(response){
                    $("#doctorTable tbody").prepend('<tr><td>p>'+ response.name +'</p></td><td><button type="button" class="btn btn-primary"  data-toggle="modal" data-target="#appointmentModal{{$doctor->id}}" ></button><td><a href="javascript:void(0)" data-type="confirm" class="btn btn-danger" onclick="deleteConfirmation({{$doctor->id}})" </a></td>  </tr>')
                    $('#doctorForm')[0].reset();
                    $('addDoctor').modal('hide');
                }
            }
        });

    });

```