67 remove sources without shapes (#74)

* mgm-cmd to clean up remove sources without shapes #67
closes remove not used adm-units #55

* again ...

shps/management/commands/cleanup.py

@@ -0,0 +1,23 @@
+from django.core.management.base import BaseCommand
+
+from shps.models import Source
+from vocabs.models import SkosConcept
+
+
+class Command(BaseCommand):
+
+    help = """Removes objects without relations (Sources and ADMs)"""
+
+    def handle(self, *args, **options):
+        no_shps = Source.objects.filter(source_of=None)
+        print(f"found {no_shps.count()} Sources without shapes")
+        no_shps.delete()
+        print("deleted Sources without shapes")
+        print("delete not used SkosConcepts")
+        no_shps = SkosConcept.objects.filter(adm_unit=None).filter(
+            narrower_concepts=None
+        )
+        print(f"found {no_shps.count()} Vocabs without shapes and children")
+        no_shps.delete()
+        print("done")
+        return "done"