Add unique index to menu

schoolapps/mealplan/migrations/0004_auto_20181211_1648.py

+# Generated by Django 2.0.7 on 2018-12-11 15:48
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('mealplan', '0003_auto_20181129_1747'),
+    ]
+
+    operations = [
+        migrations.AlterUniqueTogether(
+            name='mealplan',
+            unique_together={('calendar_week', 'year')},
+        ),
+    ]

schoolapps/mealplan/models.py

@@ -5,9 +5,14 @@ from helper import path_and_rename
 
 
 class MealPlan(models.Model):
-    calendar_week = models.IntegerField()
-    year = models.IntegerField()
-    pdf = models.FileField(upload_to=path_and_rename)
+    calendar_week = models.IntegerField(verbose_name="KW")
+    year = models.IntegerField(verbose_name="Jahr")
+    pdf = models.FileField(upload_to=path_and_rename, verbose_name="PDF")
+
+    class Meta:
+        unique_together = ("calendar_week", "year")
+        verbose_name = "Speiseplan"
+        verbose_name_plural = "Speisepläne"
 
     def __str__(self):
         return "KW {}/{}".format(self.calendar_week, self.year)