added management command to delete duplicate food properties

cookbook/management/commands/fix_duplicate_properties.py

@@ -0,0 +1,34 @@
+from django.conf import settings
+from django.contrib.postgres.search import SearchVector
+from django.core.management.base import BaseCommand
+from django.db.models import Count
+from django.utils import translation
+from django.utils.translation import gettext_lazy as _
+from django_scopes import scopes_disabled
+
+from cookbook.managers import DICTIONARY
+from cookbook.models import Recipe, Step, FoodProperty, Food
+
+
+# can be executed at the command line with 'python manage.py rebuildindex'
+class Command(BaseCommand):
+    help = _('Fixes foods with ')
+
+    def add_arguments(self, parser):
+        parser.add_argument('-d', '--dry-run', help='does not delete properties but instead prints them', action='store_true')
+
+    def handle(self, *args, **options):
+        with scopes_disabled():
+            foods_with_duplicate_properties = Food.objects.annotate(property_type_count=Count('foodproperty__property__property_type') - Count('foodproperty__property__property_type', distinct=True)).filter(property_type_count__gt=0).all()
+            for f in foods_with_duplicate_properties:
+                found_property_types = []
+                for fp in f.properties.all():
+                    if fp.property_type.id in found_property_types:
+                        if options['dry_run']:
+                            print(f'Property id {fp.id} duplicate type {fp.property_type}({fp.property_type.id}) for food {f}({f.id})')
+                        else:
+                            print(f'DELETING property id {fp.id} duplicate type {fp.property_type}({fp.property_type.id}) for food {f}({f.id})')
+                            fp.delete()
+
+                    else:
+                        found_property_types.append(fp.property_type.id)