laravel how to get all the users i talked to - php

Question

i am now working on a messaging system with laravel. Now i want to have a list of users the current user send message to / receive from. suppose i have a message table like
id | sender_id | receiver_id | msg
1 | 1 | 2 | smadksamdksa
2 | 3 | 4 | hi
3 | 1 | 2 | www
4 | 2 | 1 | ssse
5 | 3 | 1 | hi
i find get a list of id of user i talked to, the result for the user 1 will be
id
2
3
model of message
namespace App;
use Illuminate\Database\Eloquent\Model;
class msg extends Model
{
protected $table = 'msgs';
public function user()
{
return $this->belongsTo('App\user');
}
}
the query i made
$senders = msg::select('sender_id')->where('receiver_id', '=', Auth::id())->distinct()->get();
$peopleUserTalkedTo = msg::select('receiver_id')->where('sender_id', '=', Auth::id())->distinct()->union($senders)->get();
but it doesn't work with an error
Undefined property: Illuminate\Database\Eloquent\Collection::$bindings
what's wrong with it, and can i SELECT sender id and receiver AS id, can i get the user id from it later on?
I think the problem is about the union method.

Answer 1

You should define your models like this:
namespace App;
use Illuminate\Database\Eloquent\Model;
class msg extends Model
{
protected $table = 'msgs';
public function sender()
{
return $this->belongsTo('App\user','sender_id');
}
public function receiver()
{
return $this->belongsTo('App\user','receiver_id');
}
}
namespace App;
use Illuminate\Database\Eloquent\Model;
class user extends Model
{
public function talkedTo()
{
return $this->hasMany('App\msg','sender_id');
}
public function relatedTo()
{
return $this->hasMany('App\msg','receiver_id');
}
}
Now try to fetch people you talked to like this:
Auth::user()->talkedTo()->get();
Auth::user()->relatedTo()->get();
Updated
For getting only ids of the people you talked to or related to follow the code:
Auth::user()->talkedTo->pluck('id');
Auth::user()->relatedTo->pluck('id');

Answer 2

didnt realy get what u want but Try this after being sure to add this to ur user model
class user extends Model
{
public function msgs()
{
return $this->hasMany('App\msg');
}
}
then
$mymsgs = Auth::user()->msgs->get(); //collection of all msgs
and then you can use a foreach loop