Upgrade files to django 2

.env

@@ -0,0 +1 @@
+DJANGO_SETTINGS_MODULE=django_awesome_presentations.settings

.gitignore

@@ -1,4 +1,5 @@
 *.sqlite3
+__pycache__/
 
 # idea IDE
 .idea/*

django_awesome_presentations/settings.py

@@ -51,7 +51,6 @@
     'django.middleware.common.CommonMiddleware',
     'django.middleware.csrf.CsrfViewMiddleware',
     'django.contrib.auth.middleware.AuthenticationMiddleware',
-    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
 ]

manage.py

@@ -3,8 +3,13 @@
 import sys
 
 if __name__ == "__main__":
-    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "django_awesome_presentations.settings")
-
-    from django.core.management import execute_from_command_line
-
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "{{ project_name }}.settings")
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        raise ImportError(
+            "Couldn't import Django. Are you sure it's installed and "
+            "available on your PYTHONPATH environment variable? Did you "
+            "forget to activate a virtual environment?"
+        ) from exc
     execute_from_command_line(sys.argv)

my_app/models.py

@@ -21,7 +21,7 @@ def __str__(self):
 
 
 class Entry(models.Model):
-    blog = models.ForeignKey(Blog)
+    blog = models.ForeignKey(Blog, on_delete=models.CASCADE)
     headline = models.CharField(max_length=255)
     body_text = models.TextField()
     pub_date = models.DateField()