Laravel eloquent query right data - php

Question

I am fairly new to laravel and eloquent.
I have 2 tables threads and messages you can see the structure in the links below:
threads
messages
Now my goals is to query only the threads from table threads that have the same user_id in the messages table as the logged in user .
Is there a way to do this via eloquent or do I have to write a query for this?
I currently get all the threads like this:
$thread = Thread::findOrFail($id);
But this gives security issues since you can go to any thread if you change the id in my route.
EDIT
My current show function:
public function show($id)
{
$currentUserId = Auth::user()->id;
$threads = Thread::forUser($currentUserId)->latest('updated_at')->get();
try {
$thread = Thread::findOrFail($id);
} catch (ModelNotFoundException $e) {
Session::flash('error_message', 'Oops, not found.');
return redirect('messages');
}
if(array_has($threads, $thread)){
$users = User::whereNotIn('id', $thread->participantsUserIds($currentUserId))->get();
$thread->markAsRead($currentUserId);
return view('messenger.show', compact('thread', 'users'));
}else{
Session::flash('error_message', 'Oops, not found.');
return redirect('messages');
}
}
I need a way to check if $thread is inside $threads.

Answer 1

If you want to use eloquent you must first define a relationship.
One message belongs to a thread and a user. Here is how to define the relationships:
Inside the Message model:
public function user()
{
return $this->belongsTo('App/User'); //User model
}
public function thread()
{
return $this->belongsTo('App/Thread'); //Thread model
}
To define the inverse you do the following:
Inside User model:
public function threads()
{
return $this->hasMany('App/Thread');
}
Inside the Thread model:
public function messages()
{
return $this->hasMany('App/Message');
}
Now you can do the following in your controller:
$threads = Auth::user()->threads;
Now you have all threads by the currently logged in user.
I am not sure if I got the question right so ask away.
Edit:
You could check like so:
$thread = Thread::find($id);
$isCurrentUserThread = false;
foreach(Auth::user()->threads as $currentUserThread) {
if($currentUserThread->id == $thread->id) {
$isCurrentUserThread = true;
//$thread belongs to the current user
}
}
if($isCurrentUserThread) {
//the thread belongs to the current user
} else {
//it doesn't belong to the current user
}

Answer 2

There is a way to get the current user's id by calling:
$logged_in_user = Auth::user()->id
Just make sure to include this portion somewhere on top:
use Illuminate\Support\Facades\Auth;
Then, you could just get all Messages where the user_id equals to the logged in user...
$messages = App\Message::where('user_id', '=', $logged_in_user)->get();
// the get() method will get all messages, not just one
From there, you could extract the $messages variable and grab all the thread_ids, which then, you could use the find method on the Thread model, like the following:
$threads = App\Thread::find([1, 2, 3, 4, ...]);