在foreach刀片视图中出现laravel 5.6错误

Question

During an iteration of an array of array I have this error:

Invalid argument supplied for foreach() (View: C:\\xampp\\htdocs\\smartcalws\\resources\\views\\location\\index.blade.php

Below the code in the view:

 @foreach($Nations as $e)
                <tr>
                  <th scope="row">{{$e->id}}</th>
                  <td>{{$e->name}}</td>   
 @foreach($e->districts as $d)
                  <td>{{$d->name}}</td>
      @endforeach   
 @endforeach

Can anyone know the why?

In the controller if I execute the foreach all work fine with the echo:

 foreach($Nations as $e){
   foreach($e->districts as $d){
     echo $d->name;
    }
  }

All nations have districts. The echo print all the districts. I thinks that the problem is in the blade page...

return view('Nations.index',compact('Nations',$Nations));

Answer 1

The blade looks correct. Make sure you are passing the correct parameter in Nations to the blade view. It might be complaining about the first foreach. You need something like the following in the controller.

return view('yourview', [
    'Nations' => $Nations
]);

Perhaps also good to be consistent with working with lowercase variable names. Perhaps you are passing the key nations but wanting to use Nations .

Answer 2

Your problem is sending data to view

compact('Nations', $Nations) // It's wrong

Try these ways :

return view('Nations.index', compact('Nations'));
return view('Nations.index', ['Nations' => $Nations]);
return view('Nations.index')->withNations($Nations);
return view('Nations.index')->with('Nations', $Nations);

Answer 3

Make sure you pass the array to blade.

Also, you should put a check around your loops, if the array count is > 0