Php 两个表Laravel中不同行之间的关系
我想在两个表（类别和子类别）之间建立连接，以便在导航栏中显示它们。父项id对应于类别表idPhp 两个表Laravel中不同行之间的关系,php,laravel,oop,eloquent,Php,Laravel,Oop,Eloquent,我想在两个表（类别和子类别）之间建立连接，以便在导航栏中显示它们。父项id对应于类别表id Table Categories ID Title 1. Beds 2. Mattresses Table Subcategories ID Title Parent_id 1. Superimposed 1 2. Single 1 3. Arches 2 4. Foam 2 Subcateg
Table Categories
ID Title
1. Beds
2. Mattresses
Table Subcategories
ID Title Parent_id
1. Superimposed 1
2. Single 1
3. Arches 2
4. Foam 2
Class Subcategory extends Model
{
public function category()
{
return $this->belongsTo('App\Category');
}
}
class Category extends Model
{
public function subcategory()
{
return $this->hasMany('App\Subcategory');
}
}
class PostsController extends Controller
{
public function index()
{
$subcategory = Subcategory::with('category')->get();
return view('posts.index', compact('subcategory'));
}
}
<div class="navbar-collapse collapse" id="navigation">
<ul class="nav navbar-nav navbar-left">
<li class="active"><a href="">Acasa</a></li>
**@foreach($category as $subcat)**
<li class="dropdown yamm-fw">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" data-hover="dropdown" data-delay="200">**{{$subcat->category->category}}**<b class="caret"></b></a>
<ul class="dropdown-menu">
<li>
<div class="yamm-content">
<div class="row">
<div class="col-sm-3">
<h5>Categorii</h5>
<ul>
<li>
<a href="category.html">{**{Here i need to display the subcategories}**}</a>
</li>
@endforeach
</ul>
</div><!-- /.yamm-content -->
</div>
</div>
</li>
</ul>
</li>
@endforeach
@foreach($categories as $category)
<li class="dropdown yamm-fw">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" data-hover="dropdown" data-delay="200">
**{{$category->title (or whatever the name is)}}**<b class="caret"></b>
</a>
<ul class="dropdown-menu">
<li>
<div class="yamm-content">
<div class="row">
<div class="col-sm-3">
<h5>Categorii</h5>
<ul>
@foreach($category->subcategory as $sub)
<li>
<a href="category.html">
{{ $sub->title (or whatever the name is)}}
</a>
</li>
@endforeach
</ul>
<!-- Closing tags here -->
@endforeach
在这一刻，它显示床垫。我如何才能在第一位显示类别和子类别之后？对不起，我说的是英语。发生这种情况是因为您正在获取每个子类别的类别名称 您可以在控制器中执行相反的操作，而不是使用类别获取子类别，而是使用子类别获取类别 而不是：Subcategory:：with'category'->get Do:Category:：with'subcategory'->get 然后在你看来，做一个普通的foreach： PostsController.php
<?php
class PostsController extends Controller
{
public function index()
{
$categories = Category::with('subcategory')->get();
return view('posts.index', compact('categories'));
}
}
<div class="navbar-collapse collapse" id="navigation">
<ul class="nav navbar-nav navbar-left">
<li class="active"><a href="">Acasa</a></li>
**@foreach($category as $subcat)**
<li class="dropdown yamm-fw">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" data-hover="dropdown" data-delay="200">**{{$subcat->category->category}}**<b class="caret"></b></a>
<ul class="dropdown-menu">
<li>
<div class="yamm-content">
<div class="row">
<div class="col-sm-3">
<h5>Categorii</h5>
<ul>
<li>
<a href="category.html">{**{Here i need to display the subcategories}**}</a>
</li>
@endforeach
</ul>
</div><!-- /.yamm-content -->
</div>
</div>
</li>
</ul>
</li>
@endforeach
@foreach($categories as $category)
<li class="dropdown yamm-fw">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" data-hover="dropdown" data-delay="200">
**{{$category->title (or whatever the name is)}}**<b class="caret"></b>
</a>
<ul class="dropdown-menu">
<li>
<div class="yamm-content">
<div class="row">
<div class="col-sm-3">
<h5>Categorii</h5>
<ul>
@foreach($category->subcategory as $sub)
<li>
<a href="category.html">
{{ $sub->title (or whatever the name is)}}
</a>
</li>
@endforeach
</ul>
<!-- Closing tags here -->
@endforeach
为什么$subcategory=subcategory:：with'category'->get；为什么不使用Category:：with'subcategory'->获取，这样您就可以正确地循环它谢谢陛下的帮助。为了解决这个问题，我已经努力了好几个小时。10XThx。