[5.3] Change read to timestamp from boolean

src/Illuminate/Notifications/Channels/DatabaseChannel.php

@@ -20,7 +20,7 @@ public function send($notifiable, Notification $notification)
             'id' => $notification->id,
             'type' => get_class($notification),
             'data' => $this->getData($notifiable, $notification),
-            'read' => false,
+            'read_at' => null,
         ]);
     }
 

src/Illuminate/Notifications/Console/stubs/notifications.stub

@@ -17,7 +17,7 @@ class CreateNotificationsTable extends Migration
             $table->string('type');
             $table->morphs('notifiable');
             $table->text('data');
-            $table->boolean('read');
+            $table->timestamp('read_at')->nullable();
             $table->timestamps();
         });
     }

src/Illuminate/Notifications/DatabaseNotification.php

@@ -34,7 +34,7 @@ class DatabaseNotification extends Model
      */
     protected $casts = [
         'data' => 'array',
-        'read' => 'boolean',
+        'read_at' => 'datetime',
     ];
 
     /**
@@ -52,7 +52,7 @@ public function notifiable()
      */
     public function markAsRead()
     {
-        $this->forceFill(['read' => true])->save();
+        $this->forceFill(['read_at' => $this->freshTimestamp()])->save();
     }
 
     /**

src/Illuminate/Notifications/HasDatabaseNotifications.php

@@ -19,7 +19,7 @@ public function notifications()
     public function unreadNotifications()
     {
         return $this->morphMany(DatabaseNotification::class, 'notifiable')
-                            ->where('read', false)
+                            ->whereNull('read_at')
                             ->orderBy('created_at', 'desc');
     }
 }

tests/Notifications/NotificationDatabaseChannelTest.php

@@ -21,7 +21,7 @@ public function testDatabaseChannelCreatesDatabaseRecordWithProperData()
             'id' => 1,
             'type' => get_class($notification),
             'data' => ['invoice_id' => 1],
-            'read' => false,
+            'read_at' => null,
         ]);
 
         $channel = new DatabaseChannel;