Laravel編輯表單錯誤

Question

這是我的表格：

{!! Form::model($countries, ['route' => ['countries.update', $countries->id], 'method' => "PUT"]) !!}
   {{ Form::label('code', 'Country Code:') }}
   {{ Form::text('code', null, ['class' => 'form-control']) }}
   {{ Form::label('name', 'Country Name:') }}
   {{ Form::text('name', null, ['class' => 'form-control']) }}
   {{ Form::submit('Save', ['class' => 'mt-20 btn btn-success btn-sm']) }}
{!! Form::close() !!}

這是我的更新功能：

$countries = Country::find($id);
$this->validate($request, array(
   'code' => 'required|min:2|max:4',
   'name' => 'required|max:255'
));
$country = Country::where('id',$id)->first();
$country->code = Input::get('code');
$country->name = Input::get('name');
$country->save();
Session::flash('success', 'The Country info was successfully updated.');
return redirect()->route('locations.index', $country->id);

表格中出現Undefined variable: countries的問題是什么Undefined variable: countries刀片出現Undefined variable: countries錯誤？

Answer 1

從我們在評論中的對話中鞏固這個答案。

錯誤Undefined variable: countries刀片視圖（窗體）中的國家/地區出現，因為您忘記了將所述變量傳遞給視圖。

在edit函數（因此該函數調用視圖）中，添加以下內容

$countries = Country::find($id); // though I'd suggest naming it $country
...
return view('<view_name>', compact('countries'));