Question

我试图从类别表中获取ID（即文章表中的外键），然后在创建文章时将其放在视图中的隐藏字段中，然后将其传递给文章控制器，我已经尝试过，但是不确定如何执行此操作。显示的错误是“函数App \ Http \ Controllers \ ArticleController :: create（）的参数太少，传递了0个且恰好期望1个”

Answer 1

不要在create方法中传递任何内容，而是在文章视图中显示类别的下拉列表，以便您可以选择任何类别，然后从该下拉列表中将类别ID获取到存储方法。

<?php
namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Category;


class ArticleController extends Controller
{
/**
 * Display a listing of the resource.
 *
 * @return \Illuminate\Http\Response
 */

public function index()
{
}

/**
 * Show the form for creating a new resource.
 *
 * @return \Illuminate\Http\Response
 */
public function create()
{
  $categories = Category::pluck('title', 'id')
  return view('article.create', ['categories' => $categories]);
}

/**
 * Store a newly created resource in storage.
 *
 * @param  \Illuminate\Http\Request  $request
 * @return \Illuminate\Http\Response
 */
public function store(Request $request)
{
  $input = $request->all();
  Article::create($input);
  return redirect('article');
}

/**
 * Display the specified resource.
 *
 * @param  int  $id
 * @return \Illuminate\Http\Response
 */
public function show($id)
{

}

/**
 * Show the form for editing the specified resource.
 *
 * @param  int  $id
 * @return \Illuminate\Http\Response
 */
public function edit($id)
{
}

/**
 * Update the specified resource in storage.
 *
 * @param  \Illuminate\Http\Request  $request
 * @param  int  $id
 * @return \Illuminate\Http\Response
 */
public function update(Request $request, $id)
{

}

/**
 * Remove the specified resource from storage.
 *
 * @param  int  $id
 * @return \Illuminate\Http\Response
 */
public function destroy($id)
{

}

}

在您的视图中

{!! Form::open(array('action' => 'ArticleController@store', 'id' => 'createArticle')) !!}
@csrf


    <div class="row large-12 columns">
         {!! Form::label('', 'Category:') !!}
         {!! Form::select('category_id', $categories, null, ) !!}

        {!! Form::label('', 'Title:') !!}
        {!! Form::text('title', null, ['class' => 'large-8 columns']) !!}
    </div>
{!! Form::close() !!}

Laravel：如何获取外键并将其传递给控制器

1 个答案: