Invalid argument supplied for foreach with laravel 5.4 - laravel

Question

I'm getting Invalid argument supplied for foreach() error in my view after publishing a post and the code i use for looping in my controller is this:
public function edit($id)
{
$post = Post::find($id);
$categories = Category::all();
$cats = array();
foreach ($categories as $category) {
$cats[$category->id] = $category->name;
}
$tags = Tag::all();
$tags2 = array();
foreach ($tags as $tag) {
$tags2[$tag->id] = $tag->name;
}
return view('admin.posts.edit')->withPost($post)->withCategories($cats)->withTags($tags2);
}
this is the only part i handle loops in my postcontroller edit section. And I know the issue is from Tags loop because when I remove the tags code in my view other part will show up correctly.
Oh and this is the loop i use in my view:
#extends('layouts.app')
#section('content')
<div class="col-md-8">
<div class="panel panel-default">
<div class="panel-heading">{{ $post->title }}</div>
<div class="panel-body">
<p><img src="{{ asset('uploads/' . $post->image) }}" alt="{{ $post->title }}" class="img-responsive" /></p>
<p>{!! $post->body !!}</p>
</div>
<div class="tags">
#foreach ($tags as $tag)
<span class="label label-default">{{ $tag }}</span>
#endforeach
</div>
</div>
</div>
#endsection
#section('sidebar')
<div class="col-md-4">
<div class="panel panel-primary">
<div class="panel-heading"><i class="fa fa-info"></i> Post Info</div>
<div class="panel-body">
<dl class="dl-horizontal">
<label>URL:</label>
<p>{{ url('blog/'.$post->slug) }}</p>
</dl>
<dl class="dl-horizontal">
<label>Created On:</label>
<p>{{ date('M j, Y h:ia', strtotime($post->created_at)) }}</p>
</dl>
<dl class="dl-horizontal">
<label>Last Update:</label>
<p>{{ date('M j, Y h:ia', strtotime($post->updated_at)) }}</p>
</dl>
<dl class="dl-horizontal">
<label>Posted In:</label>
<p>{{ $post->category->name }}</p>
</dl>
<hr/>
<div class="row">
<div class="col-md-6">
{!! Html::linkRoute('posts.edit', 'Edit', array($post->id), array('class' => 'btn btn-warning btn-block')) !!}
</div>
<div class="col-md-6">
{!! Form::open(['route' =>['posts.destroy', $post->id], 'method' => 'DELETE']) !!}
{!! Form::submit('Delete', ['class' => 'btn btn-danger btn-block']) !!}
{!! Form::close() !!}
</div>
</div>
<hr/>
{!! Html::linkRoute('posts.index', '<< Back to Posts', [], array('class' => 'btn btn-primary btn-block')) !!}
</div>
</div>
</div>
#endsection
PS: I'm using Laravel 5.4
Post updated view!

Answer 1

You can't get tags via post so Try this...
<div class="tags">
#foreach ($tags as $tag)
<span class="label label-default">{{ $tag }}</span>
#endforeach
</div>

Answer 2

Try:
return view('admin.posts.edit')->with("post",$post)->with("categories",$cats)->with("tags",$tags2);
and at view
<div class="tags">
#foreach ($tags as $tag)
<span class="label label-default">{{ $tag->name }}</span>
#endforeach
</div>

Answer 3

in your table if your primary key name if not id you have to mention in your relationship Link
2.for your post has one category so you can show this into your view like this
{{ $post->category->name }}
if you get result you can use it. but seems you need tag key and value pair so use this methods
$tags = Tag::where('post_id',$post->id)->groupBy('id')->get();
or try your way
$tags = Tag::all();
$tags2 = array();
foreach ($tags as $tag) {
$tags2[$tag->id] = $tag->name;
}
return view('admin.posts.edit',compact($post,$tags2,$cats));
in your view try this
#foreach ($tags as $key => $tag)
<span class="label label-default">{{ $tag }}</span>
#endforeach