'make_consistent' command added

events/management/commands/make_consistent.py

@@ -0,0 +1,42 @@
+from django.core.management.base import BaseCommand
+from django.db.models import Count
+
+from releases.models import Release
+from ingest.models import DecompressedEvent
+from issues.models import Issue
+from events.models import Event
+
+
+class Command(BaseCommand):
+    help = """In 'normal operation', this command should not be used, because normal operation leaves the DB in a
+consistent state. However, during development all bets are off, and to get back to sanity this command may be used."""
+
+    def add_arguments(self, parser):
+        pass
+
+    def handle(self, *args, **options):
+        # Delete all issues that have no events; they should not exist and in fact break various templates and views
+        for issue in Issue.objects.annotate(fresh_event_count=Count('event')).filter(fresh_event_count=0):
+            print("Deleting issue %s, because it has 0 events" % issue)
+            issue.delete()
+
+        # Cleanup of dangling stuff (e.g. events without issues); not harmful, but not useful either
+        for issue in Issue.objects.filter(project=None):
+            print("Deleting issue %s, because it has no project" % issue)
+            issue.delete()
+
+        for release in Release.objects.filter(project=None):
+            print("Deleting release %s, because it has no project" % release)
+            release.delete()
+
+        for event in Event.objects.filter(issue=None):
+            print("Deleting event %s, because it has no issue" % event)
+            event.delete()
+
+        for event in Event.objects.filter(project=None):
+            print("Deleting event %s, because it has no project" % event)
+            event.delete()
+
+        for decompressed_event in DecompressedEvent.objects.filter(project=None):
+            print("Deleting decompressed event %s, because it has no project" % decompressed_event)
+            decompressed_event.delete()