I need to get each comment of news . Its working good for firstorFail() item
{{$news->comments()->firstOrFail()->name}}
But bring me empty result when im try this one with foreach:
#foreach($news->comments() as $comment)
{{$comment->name}}
#endforeach
The function firstOrFail will return exactly one comment. Seems like you actually want all comments? You should use this in your controller
$news->comments; // yeah that's it, it will load all comments
Also return news
return view('my.view', compact('news'));
Then use it in blade
#foreach($news->comments as $comment)
{{$comment->name}}
#endforeach
the line
$news->comments()
would require you to also call ->get() , because comments() will return the relation instead of the actual data.
This: $news->comments() bringing you query builder probably. So what you need is to ->get() for execute query like this:
#foreach($news->comments()->get() as $comment)
{{$comment->name}}
#endforeach
Edit
or as a #Roy Philips mentioned: $news->comments
Related
Just an example:
let's say I have Post model, and the Comment model. Post, of course, have Comments, one-to-many relation.
I have to display list of posts with comments below it.
I'll get my posts in the controller:
$posts = Post::get(), I'll pass it to the blade view and then I'll loop through it
#foreach($posts as $post)
{{ $post->title }}
{{ $post->comments }}
#endforeach
where $post->comments is some relation
public function comments()
{
return $this->hasMany(Comment::class);
}
As we know, that query will be executed many times.
Now my question: how we should optimize it?
Return Cache::remember in the getter?
Get (somehow?) those comments, when getting the posts in one query? Something like join query? I know that I can write that kind of query, but I'm talking about Eloquent's query builder. And then how get the comments within the loop? Wouldn't {{ $post->comments }} call the relation again instead of getting stored data?
Different solution?
You can do $posts = Post::with('comments')->get() to eager load the comments with the post. Read more about it in the documentation: https://laravel.com/docs/5.7/eloquent-relationships#eager-loading
Also, to display the comments you would want to add another foreach loop. It would look something like this:
#foreach($posts as $post)
{{ $post->title }}
#foreach($post->comments as $comment)
{{ $comment->title }}
#endforeach
#endforeach
You’ve probably cached some model data in the controller before, but I am going to show you a Laravel model caching technique that’s a little more granular using Active Record models
Note that we could also use the Cache::rememberForever() method and rely on our caching mechanism’s garbage collection to remove stale keys. I’ve set a timer so that the cache will be hit most of the time, with a fresh cache every fifteen minutes.
The cacheKey() method needs to make the model unique, and invalidate the cache when the model is updated. Here’s my cacheKey implementation:
public function cacheKey()
{
return sprintf(
"%s/%s-%s",
$this->getTable(),
$this->getKey(),
$this->updated_at->timestamp
);
}
public function comments()
{
return $this->hasMany(Comment::class);
}
public function getCachedCommentsCountAttribute()
{
return Cache::remember($this->cacheKey() . ':comments_count', 15, function () {
return $this->comments->count();
});
}
yes u can do like that in controller
$minutes = 60;
$posts = Cache::remember('posts', $minutes, function () {
return Post::with('comments')->get()
});
in blade u can get like that
#foreach($posts as $post)
{{ $post->title }}
#foreach($post->comments as $comment)
{{ $comment->title }}
#endforeach
#endforeach
for more information read this article
Was wondering if someone could check this out and let me know what I'm doing wrong. I'm trying to use paginate on a database query and render it in my view.
Is my DB query incorrect? I was following the docs to create it. Also read that I needed to remove ->get() when using paginate.
This is what is giving the error on my view: {{$item->paginate(4)}}, same happens if I use {{$item->links(4)}}
Everything renders fine if I remove paginate from the query in the controller..?
Here is what I'm working with.
Controller:
public function index()
{
// $news = DB::table('news')->orderBy('id', 'DESC')->paginate(4);
$news = DB::table('news')->select('id','title','description','listing_image','created_at','updated_at')->orderBy('id', 'DESC')->paginate(4);
return view('news.index',compact('news'));
}
View: (Getting error: Call to undefined method stdClass::paginate())
#if ($news->count())
#foreach($news as $item)
...html
#if ($item->listing_image)
...more html
#else
#endif
... more html
#endforeach
{{$item->paginate(4)}}
#endif
change {{$item->paginate(4)}} to {{ $news->links() }}
In my controller I return a view with a ?collection $programs? from an eloquent query to the view.
Controller
$programs = ScheduledProgram::where('registration_start_date', '<=', $today)
return View::make('admin/register_users/show', compact(programs));
I wan to do something like this without it running a new query from the view...
VIEW
{{$program->find(id)}}
I know that $programs is a dataset that already has the record, but I don't know the way to access the element by ID this way.
How do I do this?
(sorry, seems like an obviously searchable question but my search terms aren't comming up with the answer)
in that case you need to make a #foreach in $programs to access the data. Like this:
#foreach($programs as $key => $value)
{{$value->id}}
#endforeach
If the return is only one line you can do this:
{{$programs[0]->id}}
1.You have to add the method get (converts the "dataset " in a Laravel collection) to iterate the collection.
$programs = ScheduledProgram::where('registration_start_date', '<=', $today)
->get()
2.If you want to get a single record:
ScheduledProgram::where('registration_start_date', '<=', $today)->where('id', 5)->get();
I have a laravel query as the one below:
$campaign = Campaign::with(array('tracks.flights' => function($q) use ($dates)
{
$q->whereRaw("flights.start_date BETWEEN '". $dates['start']."' AND '".$dates['end']."'")->orderBy('start_date')
->with('asset')
->with('comments');
}
))
->with('tracks.group')
->with('tracks.media')
->orderBy('created_at', 'desc')
->find($id);
I am very new to laravel and right now the response from this query returns all the data required including the comments with the comments attributes from the DB.
What i want to achieve is manipulate the comments object so it includes the user name from the users table as the comments table has the user_id only as an attribute.
How can I achieve this? I am very new to laravel.
Your Comment model must have a relationship with the User model, such as:
public function user()
{
return $this->belongsTo('App\User');
}
Now when you are iterating comments you are able to do $comment->user->name or in your case it will be something like this:
#if(!$campaign->tracks->flights->isEmpty())
#foreach($campaign->tracks->flights as $flight)
#if(!$flight->comments->isEmpty())
#foreach($flight->comments as $comment)
{!! $comment->user->name !!}
#endforeach
#endif
#endforeach
#endif
Once you can do this, next step is to understand eager load with eloquent.
Why can't I access the property in an eager loaded senario?
I am trying to access the photo location for my facilities model. They have a Many:Many relationship. When I load the facility info using
$facilities = Facility::with('photos')->get();
When I try to access
foreach($facilities as $facility)
{
echo $facility->photos->id;
}
I get the Undefined property: Illuminate\Database\Eloquent\Collection::$id
If I echo $facilities->photos I end up with.
[{"id":"3",
"name":null,
"location":"facilities\/facility1.jpg\r",
"created_at":"2013-07-18 14:15:19",
"deleted_at":null,
"updated_at":null,
"pivot":{"facility_id":"5","photo_id":"3"}}]
Whats the best way to access any property in this array?
With eager loading the photos you get a photos collection and in order to get the photo you need to iterate through the photos collection e.g.
foreach($facilities as $facility)
{
foreach($facility->photos as $photo)
{
echo $photo->id;
}
}
If you only want just the first photo you can get it by calling the first() method on the collection
foreach($facilities as $facility)
{
$facility->photos->first()->id;
}
What is received from the database is an array with one object. This is why a foreach works. To access it the way you want you should add the first() method just as Atrim says, you can even drop the get() method. Only I would suggest doing it in the controller.
$facilities = Facility::with('photos')->first();
{{ $facilities->location }}
Thanks Altim, I just hit this problem too and the nested foreach is one of the solutions.
Nevertheless, I'll share with you guys the solution that I used at the end.
Instead of the nested foreach or even the eager loader, I used a Join Query Builder. In my case:
$posts = DB::table('posts')
->leftJoin('users', 'posts.user_id', '=', 'users.id')
->get();
This allowed me to use one foreach, and all the data is at the same level, in my case for instance would be something like:
#foreach ($posts as $post)
<p>{{ $post->first_name }}</p> # From users table
<p>{{ $post->title }}</p> # From posts table
<p>{{ $post->body }}</p>
#endforeach
Maybe it is not answering this question exactly , but hope it helps to others like me that ended up in this particular question.