我坚持一个非常愚蠢的查询。Laravel加入查询返回空,而原始查询有一个值
我试图找到像天的解决方案,但没有任何帮助,所以我没有找到答案。
我想从表中获得newest
反应,以显示用户名。
首先,这些都是我的数据库方案:
所以我的原始查询看起来像这个:
select `comments`.`username` from `comments` inner join `threads` on `comments`.`tid` = `threads`.`tid` where `comments`.`deleted_at` is null and `threads`.`cid` = '$categorie->id' order by `comments`.`posted_at` desc limit 1
A var_dump()
的$categorie->id
返回int(3)
其中3
代表分类编号。
什么是好的,因为这是它需要返回corract值。
然而,当我重建“Laravel,雄辩的风格”这一查询,查询看起来是这样的:
Comment::join('threads', 'comments.tid', '=', 'threads.tid')->where('threads.cid', '=', $categorie->id)->orderBy('comments.posted_at', 'DESC')->pluck('comments.username')
要注意的是,查询是建立在foreach循环中,有一个if语句之前。但是,这将在稍后播种。
这没有任何回报。
当我检查元素时,我什么都没有。我试过了DB::select(DB::raw('query'))
,但那也行不通。
我使我的网页在ForumController:
public function index()
{
$forums = Forums::orderBy('disp_order', 'asc')->get();
$categories = Categorie::orderBy('disp_order', 'asc')->get();
return View::make('index')->with('forums', $forums)->with('categories', $categories);
}
这工作得很好,并认为是这样的:
@foreach($forums as $forum)
<div class="panel-group col-sm-12">
<div class="panel panel-default">
<div class="panel-heading" style="background-color: {{ $forum->color }};">
<i class="fa fa-folder-open-o fa-fw"></i>
<strong><a href="Forum-{{ Str::slug($forum->name) }}">{{ $forum->name }}</a></strong>
</div>
<div id="forum4" class="panel-collapse collapse in">
<div class="table-responsive">
<table class="table table-hover">
<thead>
<tr>
<th></th>
<th>Forum naam</th>
<th class="text-right">Topics</th>
<th class="">Laatste post info</th>
</tr>
</thead>
<tbody>
<tr>
@foreach($categories as $categorie)
@if($categorie->fid == $forum->fid)
<td class="topic-marker-forum">
<i class="fa fa-comments fa-3x"></i>
</td>
<td class="col-md-6 col-sm-6">
<div><a href="Categorie-{{ Str::slug($categorie->name) }}" title="{{ $categorie->name }}"><strong>{{ $categorie->name }}</strong></a></div>
<div class=""><em>{{ $categorie->description }}</em></div>
</td>
<td class="col-md-1 col-sm-1 text-right"><span class="badge">{{ Thread::where('cid', '=', $categorie->id)->remember(15)->count() }}</span></td>
<td class="col-md-4 col-sm-4 ">
<div>
@if(Thread::where('cid', '=', $categorie->id)->exists() && Comment::join('threads', 'comments.tid', '=', 'threads.tid')->where('threads.cid', '=', $categorie->id)->orderBy('comments.posted_at', 'DESC')->exists())
<a href="{{ Config::get('app.url') }}/Thread-{{ Thread::where('cid', '=', $categorie->id)->orderBy('date_posted', 'DESC')->pluck('slug') }}">{{ Helper::HTMLFilter(Thread::where('cid', '=', $categorie->id)->orderBy('date_posted', 'DESC')->pluck('title')) }}</a><br>
<i class="fa fa-clock-o"></i> {{ \Carbon\Carbon::createFromFormat('Y-m-d H:i:s', Comment::join('threads', 'comments.tid', '=', 'threads.tid')->where('threads.cid', '=', $categorie->id)->orderBy('comments.posted_at', 'DESC')->pluck('posted_at'))->format('d/m/Y H:i') }}<br>
<i class="fa fa-user"></i> <a href="{{ Config::get('app.url') }}/User-{{ Comment::join('threads', 'comments.tid', '=', 'threads.tid')->where('threads.cid', '=', $categorie->id)->orderBy('comments.posted_at', 'DESC')->pluck('comments.username') }}">{{ Comment::join('threads', 'comments.tid', '=', 'threads.tid')->where('threads.cid', '=', $categorie->id)->orderBy('comments.posted_at', 'DESC')->pluck('comments.username') }}</a>
@else
<b>-</b>
@endif
</div>
</td>
</tr>
@endif
@endforeach
</tbody>
</table></div>
</div>
</div>
</div>
@endforeach
最奇怪的是,这样的:
{{ \Carbon\Carbon::createFromFormat('Y-m-d H:i:s', Comment::join('threads', 'comments.tid', '=', 'threads.tid')->where('threads.cid', '=', $categorie->id)->orderBy('comments.posted_at', 'DESC')->pluck('posted_at'))->format('d/m/Y H:i') }}
只是工作。就像没有什么不对,当我打电话给它时,它会返回正确的值。
我的模特儿很正常;
<?php
use Illuminate\Database\Eloquent\SoftDeletingTrait;
class Comment extends Eloquent
{
use SoftDeletingTrait;
protected $dates = ['deleted_at'];
protected $table = 'comments';
public $timestamps = false;
public function user()
{
return $this->belongsTo('User', 'uid');
}
}
而且
<?php
use Illuminate\Database\Eloquent\SoftDeletingTrait;
class Thread extends Eloquent
{
use SoftDeletingTrait;
protected $dates = ['deleted_at'];
protected $table = 'threads';
public $timestamps = false;
}
希望有人能帮助我!
可你'的var_dump(DB :: getQueryLog())'运行查询后,我们可以看到原始查询的差异 –
http://laravel.io/bin/2W7QN是我得到的:)(从该查询) – Robin