1 files changed, 3 insertions, 3 deletions
diff --git a/backend/models.py b/backend/models.py
index e131f66..fd12ff5 100644
--- a/backend/models.py
+++ b/backend/models.py
@@ -67,7 +67,7 @@ class SJUserProfileAdmin(admin.ModelAdmin):
 class SJUserActivity(models.Model):
     """ ScannerJammer abstract user activity model
     """
-    user = models.ForeignKey(auth.models.User)
+    user = models.ForeignKey(auth.models.User, null=True, on_delete=models.SET_NULL)
     datetime = models.DateTimeField(blank=True)
 
     class Meta:
@@ -113,7 +113,7 @@ class SJContent(SJUserActivity, SJSettingsModel):
         (u'background', u'Background'),
     )
 
-    room = models.ForeignKey(SJRoom)
+    room = models.ForeignKey(SJRoom, null=True, on_delete=models.SET_NULL)
     content_type = models.CharField(max_length=32, choices=CONTENT_TYPE)
     old_id = models.IntegerField(default=0, blank=True)
 
@@ -141,7 +141,7 @@ class SJContentAdmin(admin.ModelAdmin):
 class SJLike(SJUserActivity):
     """ ScannerJammer like model
     """
-    content = models.ForeignKey(SJContent)
+    content = models.ForeignKey(SJContent, null=True, on_delete=models.SET_NULL)
 
     class Meta:
         verbose_name = "SJ Like"