fix migration... again...

migrations/versions/fix_updated_at_trigger.py

@@ -0,0 +1,45 @@
+"""fix updated_at trigger
+
+Revision ID: fix_updated_at_trigger
+Revises: add_status_details
+Create Date: 2024-03-19 12:00:00.000000
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy import text
+
+# revision identifiers, used by Alembic.
+revision = 'fix_updated_at_trigger'
+down_revision = 'add_status_details'
+branch_labels = None
+depends_on = None
+
+def upgrade():
+    # Drop the existing trigger if it exists
+    op.execute("DROP TRIGGER IF EXISTS update_instances_updated_at ON instances")
+    op.execute("DROP FUNCTION IF EXISTS update_updated_at_column()")
+    
+    # Create the trigger function
+    op.execute("""
+        CREATE OR REPLACE FUNCTION update_updated_at_column()
+        RETURNS TRIGGER AS $$
+        BEGIN
+            NEW.updated_at = CURRENT_TIMESTAMP;
+            RETURN NEW;
+        END;
+        $$ language 'plpgsql';
+    """)
+    
+    # Create the trigger
+    op.execute("""
+        CREATE TRIGGER update_instances_updated_at
+            BEFORE UPDATE ON instances
+            FOR EACH ROW
+            EXECUTE FUNCTION update_updated_at_column();
+    """)
+
+def downgrade():
+    # Drop the trigger and function
+    op.execute("DROP TRIGGER IF EXISTS update_instances_updated_at ON instances")
+    op.execute("DROP FUNCTION IF EXISTS update_updated_at_column()")