feat: regenerate in Chat, agent and Chatflow app (#7661)

api/migrations/versions/2024_09_11_1012-d57ba9ebb251_add_parent_message_id_to_messages.py

@@ -0,0 +1,36 @@
+"""add parent_message_id to messages
+
+Revision ID: d57ba9ebb251
+Revises: 675b5321501b
+Create Date: 2024-09-11 10:12:45.826265
+
+"""
+import sqlalchemy as sa
+from alembic import op
+
+import models as models
+
+# revision identifiers, used by Alembic.
+revision = 'd57ba9ebb251'
+down_revision = '675b5321501b'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('messages', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('parent_message_id', models.types.StringUUID(), nullable=True))
+
+    # Set parent_message_id for existing messages to uuid_nil() to distinguish them from new messages with actual parent IDs or NULLs
+    op.execute('UPDATE messages SET parent_message_id = uuid_nil() WHERE parent_message_id IS NULL')
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('messages', schema=None) as batch_op:
+        batch_op.drop_column('parent_message_id')
+
+    # ### end Alembic commands ###