123 lines
3.9 KiB
Python
123 lines
3.9 KiB
Python
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"""Dialogue lineage: segment/memory/story/chapter evidence message-grade provenance.
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Revision ID: 0011_dialogue_lineage
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Revises: 0010_ce_snapshots
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"""
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from typing import Sequence, Union
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import sqlalchemy as sa
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from sqlalchemy.dialects import postgresql
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from alembic import op
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revision: str = "0011_dialogue_lineage"
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down_revision: Union[str, None] = "0010_ce_snapshots"
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branch_labels: Union[str, Sequence[str], None] = None
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depends_on: Union[str, Sequence[str], None] = None
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def _has_column(table: str, column: str) -> bool:
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bind = op.get_bind()
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return any(c["name"] == column for c in sa.inspect(bind).get_columns(table))
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def upgrade() -> None:
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if not _has_column("segments", "user_message_id"):
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op.add_column(
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"segments",
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sa.Column(
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"user_message_id",
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sa.String(),
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sa.ForeignKey("conversation_messages.id", ondelete="SET NULL"),
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nullable=True,
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),
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)
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op.create_index(
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"ix_segments_user_message_id",
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"segments",
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["user_message_id"],
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unique=False,
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)
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if not _has_column("segments", "lineage_json"):
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op.add_column(
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"segments",
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sa.Column(
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"lineage_json",
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postgresql.JSON(astext_type=sa.Text()),
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nullable=True,
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),
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)
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if not _has_column("memory_sources", "lineage_json"):
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op.add_column(
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"memory_sources",
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sa.Column(
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"lineage_json",
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postgresql.JSON(astext_type=sa.Text()),
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nullable=True,
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),
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)
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if not _has_column("memory_sources", "primary_user_message_id"):
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op.add_column(
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"memory_sources",
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sa.Column("primary_user_message_id", sa.String(), nullable=True),
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)
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op.create_index(
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"ix_memory_sources_primary_user_message_id",
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"memory_sources",
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["primary_user_message_id"],
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unique=False,
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)
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if not _has_column("story_versions", "lineage_json"):
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op.add_column(
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"story_versions",
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sa.Column(
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"lineage_json",
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postgresql.JSON(astext_type=sa.Text()),
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nullable=True,
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),
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)
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if not _has_column("chapter_evidence_snapshots", "message_lineage_json"):
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op.add_column(
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"chapter_evidence_snapshots",
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sa.Column(
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"message_lineage_json",
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postgresql.JSON(astext_type=sa.Text()),
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nullable=True,
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),
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)
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if not _has_column("chapters", "source_lineage_json"):
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op.add_column(
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"chapters",
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sa.Column(
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"source_lineage_json",
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postgresql.JSON(astext_type=sa.Text()),
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nullable=True,
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),
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)
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def downgrade() -> None:
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if _has_column("chapters", "source_lineage_json"):
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op.drop_column("chapters", "source_lineage_json")
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if _has_column("chapter_evidence_snapshots", "message_lineage_json"):
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op.drop_column("chapter_evidence_snapshots", "message_lineage_json")
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if _has_column("story_versions", "lineage_json"):
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op.drop_column("story_versions", "lineage_json")
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if _has_column("memory_sources", "primary_user_message_id"):
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op.drop_index(
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"ix_memory_sources_primary_user_message_id", table_name="memory_sources"
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)
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op.drop_column("memory_sources", "primary_user_message_id")
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if _has_column("memory_sources", "lineage_json"):
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op.drop_column("memory_sources", "lineage_json")
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if _has_column("segments", "lineage_json"):
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op.drop_column("segments", "lineage_json")
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if _has_column("segments", "user_message_id"):
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op.drop_index("ix_segments_user_message_id", table_name="segments")
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op.drop_column("segments", "user_message_id")
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