Laravel pagination with raw query - pagination

Question

When I put pagination(50); it shows WhereNull does not exist. and then I go make the whereNull into ctrl + /
and it show the next line which is OrderBy not exist. I seriously dont know where the problem is.. because I want to make pagination without using datatable from a DB::raw query.....
public function searchParticipation(Request $request){
ini_set('memory_limit','2G');
if ($request->method() != 'POST') {
return redirect()->route('ticketparticipation.view');
}
$replaceStartDate = $this->remove_string($request['start_date']);
$replaceEndDate = $this->remove_string($request['end_date']);
$valStartDate = strtotime($replaceStartDate) + (60*60*8);
$valEndDate = strtotime($replaceEndDate) + (60*60*24) + (60*60*8) - 1;
$event_id = $request['event_id'];
$category_id = $request['category_id'];
$ticket_number = $request['ticket_number'];
$full_name = $request['full_name'];
$dataEvent = array(
'event_id' => $event_id,
'category_id' => $category_id,
'ticket_number' => $ticket_number
);
$superadmins = User::UserOrganizer()->get();
$user_id = Session::get('user_id');
$roles = Session::get('roles');
if(empty(Session::get('roles'))){
auth()->logout();
return redirect('/admin/logout2');
}
$eventx = Event::query();
$eventx = $eventx->select('id', 'name');
if ($roles == 'Organizer-Admin') {
$eventx->Where('admin_id','=',$user_id);
$event = $eventx->Where('is_deleted','=','0')->get(); //->Where('is_active','=','1')
}elseif($roles == 'Organizer-Project'){
$eventx->Where('project_manager_id','=',$user_id);
$event = $eventx->Where('is_deleted','=','0')->get(); //->Where('is_active','=','1')
}elseif($roles == 'Organizer-Super-Admin'){
$eventx->Where('superadmin_id','=',$user_id);
$event = $eventx->Where('is_deleted','=','0')->get(); //->Where('is_active','=','1')
}elseif($roles == 'Superadmin-Organizer'){
$event = $eventx->Where('is_deleted','=','0')->get(); //->Where('is_active','=','1')
}
$data = array(
'user_id' => $user_id,
'roles' => $roles,
'date_start' => $request['start_date'],
'date_end' => $request['end_date']
);
if($data['roles'] == 'Organizer-Admin'){
$field = "event.admin_id";
}elseif($data['roles'] == 'Organizer-Project'){
$field = "event.project_manager_id";
}else{
$field = "event.superadmin_id";
}
$tCount = EventParticipation::Select('event_participation.id')
->join('event', 'event.id', '=', 'event_participation.event_id')
->join('categories', 'categories.id', 'event_participation.run_id');
if($event_id != ''){
$tCount = $tCount->Where("event_participation.event_id", "=", $event_id);
}
if($category_id != ''){
$tCount = $tCount->Where("event_participation.run_id", "=", $category_id);
}
if($ticket_number != ''){
$tCount = $tCount->Where(DB::raw('concat(event.ticket_number_prepend,"",event_participation.queue_id)') , '=' , $ticket_number);
}
if($full_name != ''){
$tCount = $tCount->Where("event_participation.full_name", 'LIKE' , '%'.$full_name.'%');
}
$tCount = $tCount->Where("event_participation.acceptance_date", "<>", 0)
->Where("event_participation.is_participating", "=", 1)
->Where("event_participation.is_deleted", "=", 0)
->OrderBy('event_participation.creation_date','ASC')
->get();
$eventDetail = Event::Select('name', 'registration_end', 'type','primary_currency')->Where('id', '=', $event_id)->first();
if($tCount->count() < 10000) {
$ticketParticipation = EventParticipation::Select(
DB::raw("if(epu.full_name is not null, epu.full_name, event_participation.full_name) as full_name"),
DB::raw("if(epu.address is not null, epu.address, event_participation.address) as address"),
DB::raw("if(epu.city is not null, epu.city, event_participation.city) as city"),
DB::raw("if(epu.postcode is not null, epu.postcode, event_participation.postcode) as postcode"),
DB::raw("if(epu.state is not null, epu.state, event_participation.state) as state"),
DB::raw("if(epu.country is not null, epu.country, event_participation.country) as country"),
DB::raw("if(epu.additional_info is not null, epu.additional_info, event_participation.additional_info) as additional_info"),
'event_participation.id', 'event_participation.delivery_company', 'event_participation.tracking_number', 'event_participation.run_id','event_participation.event_id', 'event_participation.local_transaction_number', 'event_participation.user_id',
'event_participation.nric_passport', 'event_participation.gender', 'event_participation.tshirt_size', 'event_participation.nationality',
'event_participation.email', 'event_participation.contact_number', 'event_participation.emergency_contact_name', 'event_participation.emergency_contact_number', 'event_participation.medical_conditions', 'event_participation.amount',
'event_participation.after_discount', 'event_participation.discount_id', 'event_participation.payment_type', 'event_participation.remarks',
'event.name AS eventname', 'event.ticket_number_prepend', 'categories.title AS run_title', 'event_participation.date_of_birth', 'event_participation.creation_date', 'event_participation.acceptance_date',
DB::raw("FROM_UNIXTIME(`event_participation`.`creation_date`,\"%d-%m-%Y %h:%i:%s %p\") AS `register_date`"),
DB::raw("CONCAT(event.`ticket_number_prepend`, '', event_participation.`queue_id`) AS `ticket_number`"),
'virtual_parcel_shipping_order.awb_id','virtual_parcel_shipping_order.awb_url','virtual_parcel_shipping_order.tracking_url','virtual_parcel_shipping_order.shipping_status',
'virtual_parcel_shipping_order.pick_up_date','virtual_parcel_shipping_order.parcel_content',
'virtual_parcel_shipping_order.status','virtual_parcel_shipping_order.response')//DB::raw("FROM_UNIXTIME(`event_participation`.`date_of_birth`,\"%d-%m-%Y\") AS `dob`"),
->join('event', 'event.id', '=', 'event_participation.event_id')
->join('categories', 'categories.id', 'event_participation.run_id')
->leftjoin('event_participation_report_status','participation_id','event_participation.id')
->leftjoin('virtual_parcel_shipping_order','participant_id','event_participation.id')
->leftjoin('event_participation_utf8 as epu', 'event_participation.id', 'epu.participation_id')->paginate(50); <<<<<<<< got problem when I add in paginate(50)
if($event_id != ''){
$ticketParticipation = $ticketParticipation->Where("event_participation.event_id", "=", $event_id);
}
if($category_id != ''){
$ticketParticipation = $ticketParticipation->Where("event_participation.run_id", "=", $category_id);
}
if($ticket_number != ''){
$ticketParticipation = $ticketParticipation->Where(DB::raw('concat(event.ticket_number_prepend,"",event_participation.queue_id)') , '=' , $ticket_number);
}
if($full_name != ''){
$ticketParticipation = $ticketParticipation->Where("event_participation.full_name", 'LIKE' , '%'.$full_name.'%');
}
$ticketParticipation = $ticketParticipation->Where("event_participation.acceptance_date", "<>", 0)
->Where("event_participation.is_participating", "=", 1)
->Where("event_participation.is_deleted", "=", 0)
->WhereNull("event_participation_report_status.participation_id")
->OrderBy('event_participation.queue_id', 'DESC')
->get()->chunk(1000);
$eventDiscount = EventDiscountCode::Select('id', 'event_id', 'amount', 'code')->Where('event_id', $event_id)->get();
return view('admin.organizer.participant_summary',['ticketParticipation'=>$ticketParticipation], compact('event', 'ticketParticipation', 'eventDiscount', 'dataEvent', 'eventDetail'));
}else{
return view('admin.organizer.participant_summaryv2', compact('event','data', 'dataEvent', 'eventDetail'));
}
}
I am seriously not sure where is the problem.....