add admin site

gaehsnitz/admin.py

@@ -0,0 +1,8 @@
+from django.contrib import admin
+
+from gaehsnitz.models import Payment
+
+
+@admin.register(Payment, site=admin.site)
+class PaymentAdmin(admin.ModelAdmin):
+    list_display = ("topic", "amount", "date", "other_party",)

gaehsnitzproject/settings.py

@@ -41,7 +41,11 @@ else:
 
 INSTALLED_APPS = [
     "gaehsnitz",
+    "django.contrib.admin",
+    "django.contrib.auth",
     "django.contrib.contenttypes",
+    "django.contrib.messages",
+    "django.contrib.sessions",
     "django.contrib.staticfiles",
 ]
 
@@ -49,6 +53,9 @@ MIDDLEWARE = [
     "django.middleware.security.SecurityMiddleware",
     "django.middleware.common.CommonMiddleware",
     "django.middleware.clickjacking.XFrameOptionsMiddleware",
+    "django.contrib.sessions.middleware.SessionMiddleware",
+    "django.contrib.auth.middleware.AuthenticationMiddleware",
+    "django.contrib.messages.middleware.MessageMiddleware",
 ]
 
 DATABASES = {
@@ -75,6 +82,8 @@ TEMPLATES = [
             "context_processors": [
                 "django.template.context_processors.debug",
                 "django.template.context_processors.request",
+                "django.contrib.auth.context_processors.auth",
+                "django.contrib.messages.context_processors.messages",
             ],
         },
     },

gaehsnitzproject/urls.py

@@ -1,5 +1,7 @@
+from django.contrib import admin
 from django.urls import path, include
 
 urlpatterns = [
+    path("admin/", admin.site.urls),
     path("", include(("gaehsnitz.urls", "gaehsnitz"))),
 ]