Add backfill_changesets command (OSMCha#675)

Author: willemarcel

osmchadjango/changeset/management/commands/backfill_changesets.py

@@ -0,0 +1,34 @@
+from datetime import date
+
+from django.core.management.base import BaseCommand
+
+from ...models import Changeset
+from ...tasks import create_changeset
+
+
+class Command(BaseCommand):
+    help = """Backfill missing changesets in a date range.
+        Start and end dates should be in YYYY-MM-DD format."""
+
+    def add_arguments(self, parser):
+        parser.add_argument("start_date", nargs=1, type=str)
+        parser.add_argument("end_date", nargs=1, type=str)
+
+    def handle(self, *args, **options):
+        try:
+            end_date = date.fromisoformat(options["end_date"][0])
+        except (ValueError, TypeError):
+            end_date = date.today()
+
+        cl = Changeset.objects.filter(
+            date__gte=date.fromisoformat(options["start_date"][0]),
+            date__lte=end_date
+        ).values_list('id')
+        cl = [c[0] for c in cl]
+
+        id = cl[len(cl) - 1]
+        final = cl[0]
+        while id < final:
+            if id not in cl:
+                create_changeset(id)
+            id = id + 1

osmchadjango/changeset/tests/test_management_commands.py

@@ -103,3 +103,17 @@ def test_error(self):
             )
         self.assertIn('Verify the SuspicionReasons ids.', self.out.getvalue())
         self.assertIn('One or both of them does not exist.', self.out.getvalue())
+
+
+class TestBackfillChangesets(TestCase):
+    def setUp(self):
+        ChangesetFactory(id='1234', date=datetime(2021,1,2))
+        ChangesetFactory(id='1238', date=datetime(2021,1,3))
+
+    def test_backfill(self):
+        call_command("backfill_changesets", '2021-01-01', '2021-01-04')
+        cl = [i[0] for i in Changeset.objects.all().values_list('id')]
+        self.assertEqual(len(cl), 5)
+        self.assertIn(1235, cl)
+        self.assertIn(1236, cl)
+        self.assertIn(1237, cl)