I have a Question
Model by about 30,000 records like this:
class Question extends Model
{
use SoftDeletes;
protected $primaryKey = 'question_id';
protected $fillable = ['text', 'code', 'cat', 'answer', 'confirmed', 'is_private', 'email', 'parent', 'expert'];
public function sub_questions ()
{
return $this->hasMany(Question::class, 'parent', 'question_id');
}
public function latest_sub_question ()
{
return $this->hasOne(Question::class, 'parent', 'question_id')->latest();
}
}
To show a list of all questions I'm using yajra datatable laravel package.
This is my js code :
var allQuestionsTable =
$('#allQuestionsTable').DataTable({
processing: true,
serverSide: true,
"bSort": false,
"responsive": true,
ajax: {
url: '{!! route('admin.questionsDatatable') !!}'
},
columns: [
{data: 'checkbox'},
{data: 'code', name: 'code'},
{data: 'text', name: 'text'},
{data: 'created_at'},
{data: 'answer', name: 'answer'},
{data: 'expert'},
{data: 'confirmed'},
{data: 'actions'}
]
});
And in the back-end I wrote this function:
public function questionsDatatable (Request $request)
{
$questions = Question::with('latest_sub_question')->whereNull('parent');
$datatable = app('datatables')->of($questions)
->addColumn('checkbox', '<input type="checkbox" name="item_id[]" value="{{$question_id}}" id="Check_{{$question_id}}">');
//other column modifications comes here
return $datatable->make(true);
}
First when my table had A few rows all things worked fine but when I added a large number of new records,questionsDatatable
return empty value and cause datatables return an alert error.
what is problem ? and is there any parameter that can use to solve this problem?
Have you tried inspecting the ajax request? It should give you an error dump on what's causing the issue.
@yajra , Yes I did but just an empty response and 500 Internal Server Error
status code returned.
of course between fetching questions and before calling app('datatables')
for some reason to iterate result I should use get()
method and then use each()
method on $questions
. in fact my backend code is :
public function questionsDatatable (Request $request)
{
$questions = Question::with('latest_sub_question')->whereNull('parent');
$questions = $questions->get();
$questions = $questions->map(function ($item, $key) {
return is_null($item->latest_sub_question) ? $item : $item->latest_sub_question;
});
$questions->sortByDesc('created_at');
$datatable = app('datatables')->of($questions)
->addColumn('checkbox', '<input type="checkbox" name="item_id[]" value="{{$question_id}}" id="Check_{{$question_id}}">');
//other column modifications comes here
return $datatable->make(true);
}
I do not know that is a reason for the error or not?
You are indeed loading all your records which would definitely eat up a lot of your resources. I suggest you remove get
. Try something like below.
public function questionsDatatable (Request $request)
{
$questions = Question::with('latest_sub_question')->whereNull('parent');
$datatable = app('datatables')->of($questions)
->addColumn('checkbox', '<input type="checkbox" name="item_id[]" value="{{$question_id}}" id="Check_{{$question_id}}">');
->editColumn('latest_sub_question', function($item) {
return is_null($item->latest_sub_question) ? $item : $item->latest_sub_question;
})
//other column modifications comes here
return $datatable->make(true);
}
Most helpful comment
You are indeed loading all your records which would definitely eat up a lot of your resources. I suggest you remove
get
. Try something like below.