RouteServiceProvider 找不到查询

Question

我正在尝试使用 post 的 slug 使 seo 友好 url。所以到目前为止我所做的就是我的 RouteServiceProvider

namespace App\Providers;

use Illuminate\Support\Facades\Route;
use Illuminate\Foundation\Support\Providers\RouteServiceProvider as ServiceProvider;
use App\Post;

class RouteServiceProvider extends ServiceProvider
{
    /**
     * This namespace is applied to your controller routes.
     *
     * In addition, it is set as the URL generator's root namespace.
     *
     * @var string
     */
    protected $namespace = 'App\Http\Controllers';

    /**
     * Define your route model bindings, pattern filters, etc.
     *
     * @return void
     */
    public function boot()
    {
      
        parent::boot();
        
        Route::bind('post', function($slug){ 
            return Post::published()->where('slug')->first();
        });
    }

这在我的 BlogController 中

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

当我转到 post http://example.com/slug-from-database 时出现错误

ModelNotFoundException in Builder.php line 426:

No query results for model [App\Post].

知道我为什么会收到此错误吗？

Answer 1

您的 WHERE 子句中缺少 $slug，此处：

Route::bind('post', function($slug){ 
    return Post::published()->where('slug')->first();
});

像这样更改查询，它将起作用：

Post::published()->where('slug', $slug)->first();

RouteServiceProvider 找不到查询

RouteServiceProvider can't find query

php

laravel

laravel-5

laravel-5.4