Laravel 5.2过滤器和下拉列表 [英] Laravel 5.2 filter with dropdownlist

问题描述

我有一个网页，显示了一些标题和类别的帖子。

该页面在 nav.blade.php 中有一个下拉列表。我从类别表动态生成下拉列表。但是，当我选择一个下拉项目（例如类别名称）时，我希望页面只显示该类别的帖子。此外，我创建了类别和帖子模型并设置了关系。我可以看到我的主页上的所有帖子，但无法用下拉列表过滤内容。

我做错了什么？我怎样才能解决这个问题？

我的nav.blade：

 < li class =dropdown> 
< a href =＃class =dropdown-toggledata-toggle =dropdownrole =button
 aria-haspopup =truearia-expanded =false> ;下拉菜单
< span class =caret>< / span>< / a> 
< ul class =dropdown-menu> 
< li> @foreach（$ categories as $ category）
< a href ={{URL :: route（'home'，$ category-> id）}}> 
< option value ={{$ category-> id}}> {{$ category-> name}}< / option> 
< / a> 
 @endforeach 
< / li> 
< / ul> 
< / li> 
  

解决方案

这会让您开始：

假设您有如下路线：

  Route :: get（'/ {category_id }'，['as'=>'home'，'uses'=>'PostController @ show']）; 
  

在 PostController @ show 方法中：

  public function show（$ category_id）
 {
 $ categories = Category :: all（）; 
 $ selected_category = Category :: with（'posts'） - > where（'id'，$ category_id） - > first（）; 
 $ posts = $ selected_category-> posts; 
 
 return redirect（） - > back（） - > with（compact（'posts'，'categories'））; 
} 
  

您可以更改重定向位置。

I want to make drop-down list filtering.

I have a web page, that shown some post with title and categories.

The page has a drop-down in nav.blade.php. I dynamically generate drop-down from categories table. But when I select an item of drop-down (for example a category name) I want page to show me the posts only of that category. Also I have created the Category and Posts model and set the relationships. I can see all posts on my main page but can't filter content with drop-down list.

What I am doing wrong? and how can I solve this issue?

My nav.blade:

<li class="dropdown">
    <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button"
       aria-haspopup="true" aria-expanded="false">Dropdown
        <span class="caret"></span></a>
    <ul class="dropdown-menu">
        <li>@foreach($categories as $category)
                <a href="{{URL::route('home',$category->id)}}">
                    <option value="{{$category->id}}">{{ $category->name }}</option>
                </a>
            @endforeach
        </li>
    </ul>
</li>

解决方案

This would get you started:

Assuming you have a route like:

Route::get('/{category_id}', ['as'=>'home', 'uses'=>'PostController@show']);

In the PostController@show method:

public function show($category_id)
{
    $categories = Category::all();
    $selected_category = Category::with('posts')->where('id', $category_id)->first();
    $posts = $selected_category->posts;

    return redirect()->back()->with(compact('posts', 'categories'));
}

You can change the redirect location.

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