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src/langbot/pkg/persistence/migrations/dbm027_bot_binding_fields.py

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+"""Add binding_uuid field to bots table and migrate data"""
+import sqlalchemy
+from .. import migration
+
+
+@migration.migration_class(27)
+class DBMigrateBotBindingFields(migration.DBMigration):
+    """Add binding_uuid field to bots table and migrate existing data"""
+
+    async def upgrade(self):
+        # Add binding_uuid column to bots table
+        # Check if column exists first (SQLite doesn't support IF NOT EXISTS for columns)
+        try:
+            await self.ap.persistence_mgr.execute_async(
+                sqlalchemy.text("SELECT binding_uuid FROM bots LIMIT 1")
+            )
+        except Exception:
+            # Column doesn't exist, add it
+            await self.ap.persistence_mgr.execute_async(sqlalchemy.text(
+                "ALTER TABLE bots ADD COLUMN binding_uuid VARCHAR(64)"
+            ))
+
+        # Migrate existing data: copy use_pipeline_uuid to binding_uuid for records
+        # that have a pipeline bound and binding_uuid is not set yet
+        await self.ap.persistence_mgr.execute_async(sqlalchemy.text("""
+            UPDATE bots
+            SET binding_uuid = use_pipeline_uuid
+            WHERE use_pipeline_uuid IS NOT NULL
+              AND use_pipeline_uuid != ''
+              AND (binding_uuid IS NULL OR binding_uuid = '')
+        """))
+
+        # Ensure binding_type is 'pipeline' for records that were migrated
+        await self.ap.persistence_mgr.execute_async(sqlalchemy.text("""
+            UPDATE bots
+            SET binding_type = 'pipeline'
+            WHERE binding_uuid IS NOT NULL
+              AND binding_uuid != ''
+              AND (binding_type IS NULL OR binding_type = '')
+        """))
+
+    async def downgrade(self):
+        # SQLite doesn't support DROP COLUMN directly
+        # This would need a table recreation in SQLite, so we'll skip it in downgrade
+        # The column will remain but won't be used
+        pass