added command scripts clean_tables, export_tables and import_tables

src/registrar/management/commands/clean_tables.py

@@ -0,0 +1,33 @@
+import logging
+from django.core.management import BaseCommand
+from django.apps import apps
+from django.db import transaction
+
+logger = logging.getLogger(__name__)
+
+class Command(BaseCommand):
+    help = "Clean tables in database to prepare for import."
+
+    def handle(self, **options):
+        """Delete all rows from a list of tables"""
+        table_names = [
+            "DomainInformation", "DomainRequest", "Domain", "User", "Contact", 
+            "Website", "DraftDomain", "HostIp", "Host"
+        ]
+        
+        for table_name in table_names:
+            self.clean_table(table_name)
+
+    def clean_table(self, table_name):
+        """Delete all rows in the given table"""
+        try:
+            # Get the model class dynamically
+            model = apps.get_model('registrar', table_name)
+            # Use a transaction to ensure database integrity
+            with transaction.atomic():
+                model.objects.all().delete()
+            logger.info(f"Successfully cleaned table {table_name}")
+        except LookupError:
+            logger.error(f"Model for table {table_name} not found.")
+        except Exception as e:
+            logger.error(f"Error cleaning table {table_name}: {e}")