Question

我在这里有一个简单的博客网络应用程序。问题是当我想在数据库中输出博客类别时。我成功保存在数据库中，并在使用return语句进行测试时对其进行了显示。但是，当我尝试将输出放在视图类别中时，将不会在视图页面上显示。当我在刀片视图中使用

时，它仅显示空白项目符号。另外，当我在类别上的数据库中添加某些内容并刷新页面时，另一个项目符号也会添加到我的视图中。

博客应用程序还具有一个主页，其中显示了预览，以便能够显示完整的博客条目，您必须在该主页上列出的博客条目上单击“查看”。

发生错误的刀片

<input type="file" id="image-input" accept="image/*">
<input type="text" id="top-text" />
<input type="text" id="bottom-text" />

<canvas style="" id="meme-canvas"></canvas>

路线 //web.php Auth :: routes（）;

\posts\view.blade.php
@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">
                <div class="panel-heading">Post View</div>

                <div class="panel-body">
                    <div class="col-md-4">
                        <ul>
                            @if(count($categories) > 0)
                                @foreach($categories->all() as $category)
                                    <li>
                                        <a href='{{url("category/{$category->id}")}}'>
                                        {{ $category->$category  }}</a>
                                    </li>
                                @endforeach
                            @else
                                <p>No category found!</p>
                            @endif
                        </ul>
                        <ul> adsfafs</ul>




                    </div>
                    <div class="col-md-8">


                    </div>                    
                </div>
            </div>
        </div>
    </div>
</div>
@endsection

控制器

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');

主页

//PostController.php
<?php

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;

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){
        $post = Post::where('id', '=', $post_id)->get();
        $categories = Category::all();

        return view('posts.view', ['post'=>$post, 'categories'=>$categories ]);

    }
    public function edit($post_id){
        return $post_id;

    }
}

Answer 1

编辑此部分：

 @foreach($categories->all() as $category)
   <li>
     <a href='{{url("category/{$category->id}")}}'>
        {{ $category->$category  }}</a>
   </li>
 @endforeach

替换为：

  @foreach($categories as $category)
   <li>
     <a href='{{url("category/{$category->id}")}}'>
        {{ $category  }}</a>
   </li>
 @endforeach

您已在控制器中使用all()从模型中获取类别。立即循环浏览类别。

Answer 2

<li>
    <a href='{{url("category/{$category->id}")}}'>
    {{ $category->$category  }}</a>
</li>

如果属性$category->$category是数据库中类别的名称，我想$category->category应该是category。

Answer 3

尝试在post / view.blade.php中的$ categories-> all（）中删除“ all（）”

Laravel 5.4：无法在视图中显示粗体内容

3 个答案: