Call to a member function count() on null

When I’m going to add data an error appears “Call to a member function count() on null”

View

                @foreach ($data as $row)
                <tr>
                  <td>{{ $row->customer}}</td>
                  <td>{{ $row->vessel}}</td>
                  <td>{{ $row->scopejob}}</td>
                  <td>{{ $row->pergantian_sparepart}}</td>
                  <td>{{ $row->teknisi}}</td>
                  <td>{{ $row->tahun}}</td>
                  <td>{{ $row->keterangan}}</td>
                  <td>{{ $row->images->count()}}</td>
                  <td>{{ $row->files->count()}}</td>
                  <td>
                    <a href={{route('data.images',$row->id)}} type="button" class="btn btn-info m-1">FOTO</a>
                    <a href={{route('data.files',$row->id)}} type="button" class="btn btn-info m-1">FILE</a>
                    <a href="/show_rekap/{{ $row->id}}" class="btn btn-warning m-1">EDIT</a>
                    <a href="#" class="btn btn-danger delete m-1" data-id="{{ $row->id}}" data-customer="{{ $row->customer}}" >DELETE</a>
                  </td>
                </tr>
                @endforeach

Controller rekap:

    public function insert_rekap(Request $request) {
        // dd($request->all());
        $this -> validate($request,[
            'customer'=>'required',
            'vessel'=>'required',
            'scopejob'=>'required',
            'pergantian_sparepart'=>'required',
            'teknisi'=>'required',
            'tahun'=>'required',
            'keterangan'=>'required'
        ]);
        $data = rekap::create($request->all());
        if($request->hasFile("images")){
            $images=$request->file("images");
            foreach($images as $image){
                $imageName=time().'_'.$image->getClientOriginalName();
                $request['rekap_id']=$data->id;
                $request['image']=$imageName;
                $image->move(public_path("/images_rekap"),$imageName);
                Image_rekap::create($request->all());

            }if($request->hasFile("files")){
                $files=$request->file("files");
                foreach($files as $file){
                    $fileName=time().'_'.$file->getClientOriginalName();
                    $request['rekap_file_id']=$data->id;
                    $request['file']=$fileName;
                    $file->move(public_path("/rekap_file"),$fileName);
                    file_rekap::create($request->all());
                }
            }
        }
        return redirect()->route('rekap')->with('success','Data Berhasil Ditambahkan');
    }

but the data is successfully entered into the database, and what steps should I take to correct the error

Answer

error tells you that images or files or both variables are null, looks like you don’t use eager loading

quick and dirty way is to use optional helper

<td>{{ optional($row->images)->count()}}</td>
<td>{{ optional($row->files)->count()}}</td>

---

if you need only count then better approach is to use eloquent counting related models

// controller
$data = rekap::withCount(['images', 'files'])
  // other selecting rules
  //->where ...
  ->get();
return view('view_name', ['data'=>$data]);

now in every $row of $data you have fields images_count and files_count

<td>{{ $row->images_count }}</td>
<td>{{ $row->files_count }}</td>

also you can rename count variables like rekap::withCount(['images as imagesCount', 'files as filesCount'])

<td>{{ $row->imagesCount }}</td>
<td>{{ $row->filesCount }}</td>