89 lines
3.7 KiB
Python
89 lines
3.7 KiB
Python
"""add qa session state table
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Revision ID: add_qa_session_state_table
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Revises: add_project_knowledge_graph_tables
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Create Date: 2026-03-02
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"""
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from __future__ import annotations
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from alembic import op
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import sqlalchemy as sa
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try:
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from sqlalchemy.dialects.postgresql import JSONB
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except Exception: # pragma: no cover
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JSONB = sa.JSON
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# revision identifiers, used by Alembic.
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revision = "add_qa_session_state_table"
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down_revision = "add_project_knowledge_graph_tables"
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branch_labels = None
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depends_on = None
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def _json_type(bind):
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return JSONB() if bind.dialect.name == "postgresql" else sa.JSON()
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def _table_exists(bind, table_name: str) -> bool:
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inspector = sa.inspect(bind)
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return inspector.has_table(table_name)
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def _index_exists(bind, table_name: str, index_name: str) -> bool:
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inspector = sa.inspect(bind)
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indexes = inspector.get_indexes(table_name)
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return any(idx.get("name") == index_name for idx in indexes)
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def _create_index_if_not_exists(bind, index_name: str, table_name: str, columns: list[str]) -> None:
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if not _index_exists(bind, table_name, index_name):
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op.create_index(index_name, table_name, columns)
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def _drop_index_if_exists(bind, index_name: str, table_name: str) -> None:
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if _index_exists(bind, table_name, index_name):
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op.drop_index(index_name, table_name=table_name)
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def upgrade() -> None:
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bind = op.get_bind()
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if not _table_exists(bind, "qa_session_states"):
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op.create_table(
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"qa_session_states",
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sa.Column("id", sa.Integer(), primary_key=True, autoincrement=True),
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sa.Column("tenant_id", sa.BigInteger(), nullable=False, server_default="1"),
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sa.Column("created_at", sa.TIMESTAMP(), nullable=False, server_default=sa.func.now()),
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sa.Column("updated_at", sa.TIMESTAMP(), nullable=False, server_default=sa.func.now(), onupdate=sa.func.now()),
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sa.Column("session_id", sa.Integer(), sa.ForeignKey("qa_sessions.id", ondelete="CASCADE"), nullable=False, unique=True),
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sa.Column("last_subject", sa.String(length=255), nullable=True),
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sa.Column("last_entity_ids", _json_type(bind), nullable=True),
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sa.Column("last_intent", sa.String(length=20), nullable=True),
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sa.Column("ambiguity", sa.String(length=20), nullable=True),
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sa.Column("rewrite_history", _json_type(bind), nullable=True),
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)
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_create_index_if_not_exists(bind, "ix_qa_session_states_tenant_id", "qa_session_states", ["tenant_id"])
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_create_index_if_not_exists(bind, "ix_qa_session_states_created_at", "qa_session_states", ["created_at"])
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_create_index_if_not_exists(bind, "ix_qa_session_states_session_id", "qa_session_states", ["session_id"])
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_create_index_if_not_exists(bind, "ix_qa_session_states_last_subject", "qa_session_states", ["last_subject"])
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_create_index_if_not_exists(bind, "ix_qa_session_states_last_intent", "qa_session_states", ["last_intent"])
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_create_index_if_not_exists(bind, "ix_qa_session_states_ambiguity", "qa_session_states", ["ambiguity"])
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def downgrade() -> None:
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bind = op.get_bind()
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if not _table_exists(bind, "qa_session_states"):
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return
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_drop_index_if_exists(bind, "ix_qa_session_states_ambiguity", "qa_session_states")
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_drop_index_if_exists(bind, "ix_qa_session_states_last_intent", "qa_session_states")
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_drop_index_if_exists(bind, "ix_qa_session_states_last_subject", "qa_session_states")
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_drop_index_if_exists(bind, "ix_qa_session_states_session_id", "qa_session_states")
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_drop_index_if_exists(bind, "ix_qa_session_states_created_at", "qa_session_states")
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_drop_index_if_exists(bind, "ix_qa_session_states_tenant_id", "qa_session_states")
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op.drop_table("qa_session_states")
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