Call to a member function count() on null - php

Question

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>
FOTO
FILE
EDIT
<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 1

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>

Answer 2

Try
<td>{{ $row->images ? $row->images->count() : '' }}</td>