Create 6b27af76a38a_one_running_run_per_conversation.py

Author: beacoder

migrations/versions/6b27af76a38a_one_running_run_per_conversation.py

@@ -0,0 +1,36 @@
+"""one running run per conversation
+
+Revision ID: 6b27af76a38a
+Revises: 29f302f66e10
+Create Date: 2026-09-24 08:45:15.111435
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '6b27af76a38a'
+down_revision: Union[str, Sequence[str], None] = '29f302f66e10'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('runs', schema=None) as batch_op:
+        batch_op.create_index('uq_one_running_run_per_conversation', ['conversation_id'], unique=True, sqlite_where=sa.text("status = 'running'"), postgresql_where=sa.text("status = 'running'"))
+
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('runs', schema=None) as batch_op:
+        batch_op.drop_index('uq_one_running_run_per_conversation', sqlite_where=sa.text("status = 'running'"), postgresql_where=sa.text("status = 'running'"))
+
+    # ### end Alembic commands ###