75 lines
3.2 KiB
Python
75 lines
3.2 KiB
Python
"""Immutable chunk snapshots and atomic publication metadata (no vector index yet)."""
|
|
|
|
from datetime import datetime
|
|
|
|
from sqlalchemy import (
|
|
JSON,
|
|
CheckConstraint,
|
|
DateTime,
|
|
ForeignKey,
|
|
Integer,
|
|
String,
|
|
Text,
|
|
UniqueConstraint,
|
|
func,
|
|
)
|
|
from sqlalchemy.orm import Mapped, mapped_column
|
|
|
|
from app.db.session import Base
|
|
|
|
|
|
class IndexVersion(Base):
|
|
__tablename__ = "index_versions"
|
|
__table_args__ = (
|
|
CheckConstraint(
|
|
"status IN ('ready', 'published', 'superseded')", name="ck_index_version_status"
|
|
),
|
|
)
|
|
id: Mapped[str] = mapped_column(String(36), primary_key=True)
|
|
status: Mapped[str] = mapped_column(String(20), nullable=False, default="ready")
|
|
config: Mapped[dict] = mapped_column(JSON, nullable=False)
|
|
corpus_fingerprint: Mapped[str] = mapped_column(String(64), nullable=False)
|
|
catalog_revision: Mapped[int] = mapped_column(Integer, nullable=False)
|
|
item_count: Mapped[int] = mapped_column(Integer, nullable=False)
|
|
chunk_count: Mapped[int] = mapped_column(Integer, nullable=False)
|
|
created_by: Mapped[int] = mapped_column(ForeignKey("users.id"), nullable=False)
|
|
created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
|
|
published_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
|
|
|
|
|
|
class IndexState(Base):
|
|
__tablename__ = "index_state"
|
|
__table_args__ = (CheckConstraint("id = 1", name="ck_index_state_singleton"),)
|
|
id: Mapped[int] = mapped_column(primary_key=True)
|
|
active_version_id: Mapped[str | None] = mapped_column(ForeignKey("index_versions.id"))
|
|
generation: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
|
|
catalog_revision: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
|
|
|
|
|
|
class Chunk(Base):
|
|
__tablename__ = "chunks"
|
|
__table_args__ = (
|
|
UniqueConstraint("index_version_id", "knowledge_id", "ordinal", name="uq_chunk_position"),
|
|
CheckConstraint("start_offset >= 0 AND end_offset > start_offset", name="ck_chunk_offsets"),
|
|
)
|
|
id: Mapped[str] = mapped_column(String(36), primary_key=True)
|
|
index_version_id: Mapped[str] = mapped_column(ForeignKey("index_versions.id"), index=True)
|
|
knowledge_id: Mapped[int] = mapped_column(ForeignKey("knowledge_items.id"), nullable=False)
|
|
ordinal: Mapped[int] = mapped_column(Integer, nullable=False)
|
|
start_offset: Mapped[int] = mapped_column(Integer, nullable=False)
|
|
end_offset: Mapped[int] = mapped_column(Integer, nullable=False)
|
|
text: Mapped[str] = mapped_column(Text, nullable=False)
|
|
text_sha256: Mapped[str] = mapped_column(String(64), nullable=False)
|
|
provenance: Mapped[dict] = mapped_column(JSON, nullable=False)
|
|
|
|
|
|
class IndexPublication(Base):
|
|
__tablename__ = "index_publications"
|
|
generation: Mapped[int] = mapped_column(primary_key=True)
|
|
previous_version_id: Mapped[str | None] = mapped_column(ForeignKey("index_versions.id"))
|
|
version_id: Mapped[str] = mapped_column(ForeignKey("index_versions.id"), nullable=False)
|
|
actor_id: Mapped[int] = mapped_column(ForeignKey("users.id"), nullable=False)
|
|
published_at: Mapped[datetime] = mapped_column(
|
|
DateTime(timezone=True), server_default=func.now()
|
|
)
|