Laravel Associate方法在视图中返回空数组 [英] Laravel Associate method is returning empty array in the view
问题描述
我正在一个简单的社交网络上工作，现在正在答复部分中工作.我将发布/状态模型与用户关联如下，但是当我尝试在视图中访问时，它返回空数组[].
I am working on a simple social network, i am working on the replies section now. I associated the post/status model with user as below, but when i tried to access in the view it returns empty array [].
帖子模型中的回复功能
public function postReply(Request $request, $statusId){
$this->validate($request, [
"reply-{$statusId}" => 'required|max:1000',
],
[
'required' => 'The reply body is required'
]
);
$post = Post::notReply()->find($statusId);
if(!$post){
return redirect('/');
}
if(!Auth::user()->isFriendsWith($post->user) && Auth::user()->id !== $post->user->id){
return redirect('/');
}
$post = Post::create([
'body' => $request->input("reply-{$statusId}"),
]);
$post->user()->associate(Auth::user());
$post->replies()->save($post);
return redirect()->back();
}
发布模型
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Post extends Model
{
protected $table = 'posts';
protected $fillable = ['body'];
public function user(){
return $this->belongsTo('App\User');
}
public function likes(){
return $this->hasMany('App\Like');
}
public function scopeNotReply($query){
return $query->whereNull('parent_id');
}
public function replies(){
return $this->hasMany('App\Post', 'parent_id');
}
}
帖子表
查看我通过$ post-> replies
<section class="row new-post">
<div class="col-md-6 col-md-offset-3">
<header><h3>What do you have to say?</h3></header>
<form action="{{ url('createpost') }}" method="post">
<div class="form-group">
<textarea class="form-control" name="body" id="new-post" rows="5" placeholder="Your Post"></textarea>
</div>
<button type="submit" class="btn btn-primary">Create Post</button>
<input type="hidden" value="{{ Session::token() }}" name="_token">
</form>
</div>
</section>
<section class="row posts">
<div class="col-md-6 col-md-offset-3">
<header><h3>What other people say...</h3></header>
@foreach($posts as $post)
<article class="post media" data-postid="{{ $post->id }}">
<a class="pull-left" href="{{ url('user', $post->user->username) }}">
<img class="media-object" alt="" src="{{ $post->user->getAvatarUrl() }}">
</a>
<div class="media-body">
<h4 class="media-heading"><a href="{{ url('user', $post->user->username) }}"> {{ $post->user->username }}</a></h4>
<p>{{ $post->body }}</p>
<ul class="list-inline">
<li>{{ $post->created_at->diffForHumans() }}</li>
<li><a href="#">Like</a></li>
<li>10 likes</li>
</ul>
{{ $post->replies }}
</div>
<form role="form" action="{{ url('createpost', $post->id )}}" method="post">
<div class="form-group{{ $errors->has("reply-{$post->id}") ? ' has-error': '' }}">
<textarea name="reply-{{ $post->id }}" class="form-control" rows="2" placeholder="Reply to this status"></textarea>
@if($errors->has("reply-{$post->id}"))
<span class="help-block">{{ $errors->first("reply-{$post->id}") }} </span>
@endif
</div>
<input type="submit" value="Reply" class="btn btn-default btn-sm">
<input type="hidden" name="_token" value="{{ Session::token() }}">
</form>
</article>
@endforeach
</div>
</section>
PS:我正在使用一个表来建立关系，即职位，并且在职位表中有一个列名parent_id，通过它我将关系与表本身链接起来.
PS : I am using one table for the relationship i.e posts and in posts table there is a column name parent_id via which i am linking the relationship to the table with itself.
{{ $post->replies }}返回空数组.按照逻辑，它应该返回与回复有关的评论回复.
{{ $post->replies }} returns empty array. By logic it should return the replies of comment related to the replies .
如果还有其他需要，请提一下我会分享.
If any thing else is needed, just mention i will share.
更新:请注意，用户注释的所有回复都存储在具有唯一ID的数据库表帖子中，即parent_id唯一的是，当我尝试访问它时，它将返回空数组
UPDATE : Note that the all the replies the user comment is stored in the database table posts with unique id i.e parent_id The only thing is that when i try to access it it returns empty array.
推荐答案
在将变量传递到视图时，您似乎没有将答复附加到$post变量中.
我们必须使用with()连接这两个表的方法.
请尝试以下操作:
It seems like your are not attaching the replies to your $post variable while passing it to your view.
We have to use with() method to join these two tables.
Try, the following :
if(Auth::check()){
$posts = Post::notReply()
->where(function($query){
return $query->where('user_id', Auth::user()->id)
->orWhereIn('user_id', Auth::user()->friends()->lists('id'));
})
->with('replies')//Here we are joining the replies to the post
->orderBy('created_at', 'desc')
->get();
return view('timeline.index', compact('posts'));
}
现在，在您的视图中，您将需要使用2个foreach循环，如下所示:
Now, in your View you would need to use 2 foreach loop like below:
@foreach($posts as $post)
{{--Your Code --}}
@foreach($post->replies as $reply)
{{--Your Code --}}
@endforeach
{{--Your Code --}}
@endforeach
更新:
postReply()方法存在问题.在旧代码中，您覆盖了$post变量，因此，答复将parent_id作为其自己的id.
因此，请使用$reply变量替换您的旧代码.
旧的:
Update:
Problem is with the postReply() method. In old code you were overriding the $post variable, due to which the reply was getting parent_id as its own id.
So, replace your old code with using $reply variable.
old:
$post= Post::create([
'body' => $request->input("reply-{$statusId}"),
]);
$post->user()->associate(Auth::user());
$post->replies()->save($post);
新
$reply = Post::create([
'body' => $request->input("reply-{$statusId}"),
]);
$post->user()->associate(Auth::user());
$post->replies()->save($reply);
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