I'm using Laravel 5.6, and the following is my view (leads/show.blade.php):
<form method="post" id="student_form">
{{csrf_field()}}
<span id="form_output"></span>
<div class="form-group">
<label>Choose Group for Your Lead</label>
<select name="group_id" id="group_id" class="form-control">
@foreach($groups as $group)
<option value="{{$group->id}}"> {{$group->name}}</option>
@endforeach
</select>
<input type="hidden" name="customer_id" id="customer_id" value="{{$lead->id}}">
</div>
<div class="modal-footer">
<input type="hidden" name="student_id" id="student_id" value="" />
<input type="hidden" name="button_action" id="button_action" value="insert" />
<input type="submit" name="submit" id="action" value="Add" class="btn btn-info" />
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</form>
and the route is :
Route::post('leads/savegroup', 'LeadsController@savegroup')->name('leads.savegroup');
Please help me to find the error in this route.