Laravel 中的资源控制器概念

Question

当我正在学习 laravel 时，我无法理解当我尝试通过在 URL 中键入帖子/编辑来访问我的 edit.blade.php 页面时（该文件位于资源/视图/帖子中） 它正在调用方法 show 并在该页面上打印“show”，如果我输入 posts/posts/edit，edit.blade.php（如下所述）就会出现。请指导我在这里做错了什么

edit.blade.php

@extends('main')
@section('content')
<h1>Update Post</h1>
<form method="POST" action="{{route('posts.update', $post) }}"  >
    @method('PUT')
    @csrf
    <input type="text" name="title"><br><br>
    <input type="text" name="body"><br><br>
    <button type="submit" class="btn btn-primary">Update</button>
</form>
@endsection

PostController.php（资源控制器）

    <?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use App\posts;
use Sessions; 


class PostController extends Controller
{ 
    public function create()
    {
        return view('posts.create');   
    }

    public function store(Request $request)
    {
       $post = new posts;
        $post->title = $request->input('title');
        $post->body = $request->input('body');
        $post->save();
        return redirect('posts/read');
    }

    public function show($data)
    {
       echo "show";
    }

    public function edit($id)
    {
        return view('posts.edit');
    }

    public function update(Request $req, $id)
    {
        echo posts::where('title' , $req->title)
        ->update(['body'=>$req->body]);
        return redirect('/');
    }

    public function destroy($id)
    {
        $post = posts::find($id);
        $post->delete();
        return redirect('/');

    }
}

路线：

Route::resource('posts', 'PostController');

Answer 1

首先你像这样改变你的控制器

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use App\Post;
use Sessions; 


class PostController extends Controller
{ 
    public function create()
    {
        return view('posts.create');   
    }

    public function store(Request $request)
    {
        $post = new Post;
        $post->title = $request->input('title');
        $post->body = $request->input('body');
        $post->save();
        return redirect('posts/read');
    }

    public function show($id)
    {
       $post = Post::find($id);
       return view(posts.show, ['post' => $post]);
    }

    public function edit($id)
    {
       $post = Post::find($id);
       return view(posts.edit, ['post' => $post]);
    }

    public function update(Request $request, $id)
    {
        dd($request->all()); //check before update
    }

    public function destroy($id)
    {
        $post = Post::find($id);
        $post->delete();
        return redirect('/');

    }
}

在您的edit.blade.php 中添加$post->id 以形成route

@extends('main')
@section('content')
<h1>Update Post</h1>
<form method="POST" action="{{route('posts.update', $post->id) }}"  >
    @method('PUT')
    @csrf
    <input type="text" name="title"><br><br>
    <input type="text" name="body"><br><br>
    <button type="submit" class="btn btn-primary">Update</button>
</form>
@endsection

然后你在view/posts文件夹中创建show.blade.php并将这段代码放到show.blade.php

@extends('main')
@section('content')
<h1>Show Post</h1>
<h1>{{ $post->title }}</h1> 
<p>{{ $post->body }}</p> 
@endsection

Answer 2

你的路线是这样的：

GET posts/{post}/edit    EDIT
GET posts/{post}         SHOW

所以 URI posts/edit 匹配 SHOW 路由：

posts/edit             posts/{post}
                       posts/edit

URI posts/posts/edit 与 EDIT 路由匹配：

posts/posts/edit       posts/{post}/edit
                       posts/posts /edit

这是预期的以及如何设置路线。

Laravel 7.x Docs - Controllers - Resource Conrollers