<?php
use Illuminate\Support\Facades\Route;
use App\Http\Controllers\PostController;

//showのみ laravel8.0
Route::get('/post/{id}', [PostController::class, 'show'])->name('posts.show');
Route::resource('posts', PostController::class)->only(['show']);
//showのみ laravel6.0
Route::get('/post/{id}', 'PostController@show')->name('posts.show');
Route::resource('posts', 'PostController')->only(['show']);

//全て
Route::resource('posts', PostController::class);

//index以外全て
Route::resource('posts', PostController::class)->except(['index']);

//ログイン中のみ全て
Auth::routes();
Route::resource('posts', PostController::class)->middleware('auth');

//ログイン中のみ全て（グループ)
Auth::routes();
Route::middleware(['auth'])->group(function () {
Route::resource('posts', PostController::class);
    });

//controllerを介さない
Route::get('/home',function (){
    return view('home');
})->name('home');

//index
<a href="{{ route('posts.index') }}">一覧</a>

//show
<a href="{{ route('posts.show', $post->id) }}">詳細</a>

//edit 2パターン
<form method="GET" action="{{ route('posts.edit', $post->id) }}">
<input type="submit"value="編集">
</form>

<a href="{{ route('posts.edit', $post->id) }}">新規編集</a>

//create
<a href="{{ route('posts.create') }}">新規登録</a>

//store
<form action="{{ route('posts.store') }}" method="post">
@csrf
<input type="submit"value="投稿">
</form>

//update
<form method="POST" action="{{ route('posts.update', $post->id) }}">
@csrf
@method('PATCH')
<input type="submit"value="更新">
</form>

//destroy
<form method="POST" action="{{ route('posts.destroy', $post->id) }}">
@csrf
@method('DELETE')
<input type="submit"value="削除">
</form>

<?php
namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\Post;
use App\Http\Requests\PostRequest;

//use Illuminate\Support\Facades\Auth;

class PostController extends Controller
{
    public function index()
    {
        $posts = Post::all();
        return view('posts.index',compact('posts'));
    }

    public function show(Post $post)
    {
       return view('posts.show',compact('post'));
    }

    public function edit(Post $post)
    {
       view('posts.edit',compact('post'));
    }

    public function create()
    {
        return view('posts.create');
    }

    public function store(PostRequest $request, Post $post)
    {
        //postのuser_idが不要の場合
        $post->fill($request->all())->save();
        return redirect(route('posts.index'));

        //postのuser_idが必要の場合
        $post->fill($request->all());
        $post->user_id = $request->user()->id;
        $post->save();
        return redirect(route('posts.index'));
    }

    public function update(PostRequest $request, Post $post)
    {
      $post->fill($request->all())->save();
      return redirect(route('posts.index'));
    }

    public function destroy(Post $post)
    {
        $post->delete();
        return redirect(route('posts.index'))->with('success','削除しました');
    }
}

<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

class PostRequest extends FormRequest
{
    /**
     * Determine if the post is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return true;  //false->trueに変更しておく
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */

//バリデーションの内容記入
    public function rules()
    {
        return [
            'content' => 'required|string|max:50',
            'title' => 'required|string|max:50',
        ];
    }
 //バリデーションのエラーメッセージに表示される項目名を変更
    public function attributes()
    {
        return [
            'content' => '内容',
            'title' => 'タイトル',
        ];
    }
//エラーメッセージ内容を変更
    public function messages()
    {
        return [
            'content.required' => '内容を入力してください',
            'title.required' => 'タイトルを入力してください',

        ];
    }

}

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Post extends Model
{
    protected $fillable = [
            'title',
            'content'
    ];
}