我这里有一个简单的博客应用程序，用户可以在其中添加/编辑/删除帖子；喜欢不喜欢的帖子，并查看帖子的类别排列。这里不起作用的是当我尝试检查查询是否会返回某些内容，但仅返回空数组/空值
时当我尝试检查是否单击某个类别时，帖子控制器的类别功能未返回任何值。
这也是单击我想要的类别后URL上的示例输出，但是它在页面[[]]上显示空白值，但是我猜该URL提供了一些线索，但我不知道自己该怎么做。 http://localhost:8000/category/%7B%20%7B%22id%22:4,%22category%22:%22animals%22,%22created_at%22:%222018-07-09%2009:54:49%22,%22updated_at%22:%222018-07-09%2009:54:49%22%7D-%3E%20id%7D
后控制器
namespace App\Http\Controllers;
use Illuminate\Support\Facades\Input;
use Illuminate\Support\Facades\File;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\URL;
use App\Category;
use App\Post;
use Auth;
use DB;
class PostController extends Controller
{
//
public function post(){
$categories = Category::all();
$posts= Post::all();
//return $posts;
//exit(); pang testing
return view('posts.post', ['categories'=> $categories, 'posts'=>$posts]);
}
public function addPost(Request $request){
//return $request->input('post_title');
$this->validate($request,[
'post_title'=> 'required',
'post_body'=> 'required',
'category_id'=> 'required',
'post_image'=> 'required',
]);
//return "validation pss";
$posts = new Post;
$posts->post_title=$request->input('post_title');
$posts->user_id= Auth::user()->id; //returns user details
$posts->post_body=$request->input('post_body');
$posts->category_id=$request->input('category_id');
if(Input::hasFile('post_image')){
$file = Input::file('post_image');
$file -> move(public_path(). '/posts/', $file->getClientOriginalName());
$url = URL::to("/") . '/posts/' . $file->getClientOriginalName();
}
$posts->post_image= $url;
$posts->save();
return redirect('/home')->with('response','Post Published Successfully');
}
public function view($post_id){
$posts = Post::where('id', '=', $post_id)->get();
$categories = Category::all();
return view('posts.view', ['posts'=> $posts, 'categories'=> $categories]);
}
public function edit($post_id){
//return $post_id;
$categories = Category::all();
$posts = Post::find($post_id);
$category = Category::find($posts->category_id);
//return $posts;
return view('posts.edit', ['categories'=>$categories, 'posts'=>$posts, 'category'=>$category]);
}
public function editPost(Request $request, $post_id){
$this->validate($request,[
'post_title'=> 'required',
'post_body'=> 'required',
'category_id'=> 'required',
'post_image'=> 'required',
]);
//return "validation pss";
$posts = new Post;
$posts->post_title=$request->input('post_title');
$posts->user_id= Auth::user()->id; //returns user details
$posts->post_body=$request->input('post_body');
$posts->category_id=$request->input('category_id');
if(Input::hasFile('post_image')){
$file = Input::file('post_image');
$file -> move(public_path(). '/posts/', $file->getClientOriginalName());
$url = URL::to("/") . '/posts/' . $file->getClientOriginalName();
}
$posts->post_image= $url;
$data = array(
'post_title' => $posts->post_title,
'user_id' => $posts->user_id,
'post_body' => $posts->post_body,
'category_id' => $posts->category_id,
'post_image' => $posts->post_image
);
Post::where('id', $post_id)
->update($data);
$posts->update();
return redirect('/home')->with('response','Post Updated Successfully');
}
public function deletePost($post_id){
Post::where('id', $post_id)
->delete();
return redirect('/home')->with('response','Post Deleted Successfully');
}
public function category($cat_id){
$categories = Category::all();
$posts = DB::table('posts')
->join('categories', 'posts.category_id', '=', 'categories.id')
->select('posts.*', 'categories.*')
->where(['categories.id' => $cat_id])
->get();
return $posts;
exit();
return view('categories.categoriesposts', ['categories' => $categories]);
}
}
观看次数
view.blade在此处是您选择特定帖子时在博客的索引页面之后的位置，您可以在右侧看到类别，在其中可以选择所需的类别以及与之相关的帖子。
@extends('layouts.app')
@section('content')
<div class="container">
<div class="row">
<div class="col-md-8 col-md-offset-2">
<div class="panel panel-default text-center">
<div class="panel-heading">Post View</div>
<div class="panel-body">
<div class="col-md-4">
<ul class="list-group"><span>
@if(count($categories)>0)
@foreach($categories->all() as $category)
<li class="list-group-item"><a href='{{ url("category/{ $category-> id}") }}'>{{ $category->category }} </a>
</li>
@endforeach
@else
<p>not</p>
@endif
</span>
</ul>
意见： categorypost.blade
@extends('layouts.app')
@section('content')
<div class="container">
<div class="row">
<div class="col-md-8 col-md-offset-2">
<div class="panel panel-default text-center">
<div class="panel-heading">Post View</div>
<div class="panel-body">
<div class="col-md-4">
<ul class="list-group"><span>
@if(count($categories)>0)
@foreach($categories->all() as $category)
<li class="list-group-item"><a href='{{ url("category/{ $category-> id}") }}'>{{ $category->category }} </a>
</li>
@endforeach
@else
<p>not</p>
@endif
</span>
</ul>
</div>
<div class="col-md-8">
</div>
</div>
</div>
</div>
</div>
</div>
@endsection
路线
<?php
/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/
Route::get('/', function () {
return view('auth.login');
});
Auth::routes();
Route::get('/home', 'HomeController@index')->name('home');
Route::get('/post', 'PostController@post');
Route::get('/profile', 'ProfileController@profile');
Route::get('/category', 'CategoryController@category');
Route::post('/addCategory', 'CategoryController@addCategory');
Route::post('/addProfile', 'ProfileController@addProfile');
Route::post('/addPost', 'PostController@addPost');
Route::get('/view/{id}', 'PostController@view');
Route::get('/edit/{id}', 'PostController@edit');
Route::post('/editPost/{id}', 'PostController@editPost');
Route::get('/delete/{id}','PostController@deletePost');
Route::get('/category/{id}','PostController@category');
Home.blade 这是博客的索引页面，您可以看到博客文章的概述，可以在此处删除和编辑文章
@extends('layouts.app')
<style type="text/css">
.avatar{
border-radius: 100%;
max-width: 100px;
}
</style>
@section('content')
<div class="container">
<div class="row">
<div class="col-md-8 col-md-offset-2">
@if(count($errors)>0)
@foreach($errors->all() as $error)
<div class="alert alert-danger">{{ $error }}</div>
@endforeach
@endif
@if(session('response'))
<div class="alert alert-success">{{ session('response')}}</div>
@endif
<div class="panel panel-default">
<div class="panel-heading">Dashboard</div>
<div class="panel-body">
<div class="col-md-4">
@if(!empty($profile))
<img src="{{ $profile->profile_pic }}" class="avatar" alt="">
@else
<img src="{{ url('images/avatar.jpg')}}" class="avatar" alt="">
@endif
@if(!empty($profile))
<p class="lead">{{ $profile->name }}</p>
@else
<p></p>
@endif
@if(!empty($profile))
<p class="lead">{{ $profile->designation }}</p>
@else
<p></p>
@endif
</div>
<div class="col-md-8">
@if(count($posts) > 0)
@foreach($posts->all() as $post)
<h4>{{ $post -> post_title }} </h4>
<img src="{{ $post -> post_image }}" alt="">
<p>{{ substr($post->post_body, 0, 150) }}</p>
<ul class="nav nav-pills">
<li role="presentation">
<a href="{{ url("/view/{$post->id}") }}">
<span class="fa fa-eye">View</span>
</a>
</li>
<li role="presentation">
<a href="{{ url("/edit/{$post->id}") }}">
<span class="fa fa-pencil-square">Edit</span>
</a>
</li>
<li role="presentation">
<a href="{{ url("/delete/{$post->id}") }}">
<span class="fa fa-trash">Delete</span>
</a>
</li>
</ul>
<cite style="float left;">Posted on: {{ date('M j, Y H:i', strtotime($post->updated_at)) }}</cite>
@endforeach
@else
<p>No Post Available!</p>
@endif
{{ $posts->links() }}
</div>
</div>
</div>
</div>
</div>
</div>
@endsection