Styjun

I have two tables as users and notifications, and I have a foreign key of notification_id in my users table, and in notifications.blade.php, I'm trying to get the user through id of notifications table as:

NotificationController:

public function notifications() 
 $notifications = AppNotification::latest('created_at')->get();
 return view('notifications', compact('notifications'));

notifications.blade.php:

@foreach ($notifications as $notification)
 $notification->user->id 
@endforeach

User.php(model):

public function notifications() 
 return $this->hasMany('AppNotifications', 'notification_id');

Notification.php(model):

public function user() 
 return $this->belongsTo('AppUser', 'notification_id');

Notifications table schema:

Schema::create('notifications', function (Blueprint $table) 
 $table->engine = "InnoDB";
 $table->increments('id');
 $table->string('message');
 $table->timestamps();
);

Users table schema:

Schema::create('users', function (Blueprint $table) 
 $table->engine = 'InnoDB';
 $table->increments('id');
 $table->string('email')->unique();
 $table->string('password');
 $table->unsignedInteger('notification_id')->nullable();
 $table->foreign('notification_id')->references('id')->on('notifications');
);

but I'm getting Trying to get property of non-object error.

the foreign key must be in Notification model (user_id) instead User model.
because your relationship say that

EDIT:

your code must be like this:
User.php(model):

public function notifications() 
 return $this->hasMany('AppNotification', 'user_id');

Notification.php(model):

public function user() 
 return $this->belongsTo('AppUser', 'user_id');

Notifications table schema:

Schema::create('notifications', function (Blueprint $table) 
 $table->engine = "InnoDB";
 $table->increments('id');
 $table->string('message');
 $table->timestamps();
 $table->unsignedInteger('user_id')->nullable();
 $table->foreign('user_id')->references('id')->on('user');
);

Users table schema:

Schema::create('users', function (Blueprint $table) 
 $table->engine = 'InnoDB';
 $table->increments('id');
 $table->string('email')->unique();
 $table->string('password');
);

I have fixed this issue, thanks to Chris Forrence, I have changed the relation-ship as Chris Forrence said.