45 lines
2.2 KiB
Python
45 lines
2.2 KiB
Python
import uuid
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from sqlalchemy import Column, String, Boolean, DateTime, ForeignKey, Text, Integer, Float, JSON
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from sqlalchemy.dialects.postgresql import UUID
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from sqlalchemy.orm import relationship
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from sqlalchemy.sql import func
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from app.core.database import Base
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class ChatSession(Base):
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__tablename__ = "lightrag_chat_sessions_history"
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id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
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user_id = Column(String(255), nullable=False, index=True)
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title = Column(String(255), nullable=True)
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rag_config = Column(JSON, default={})
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summary = Column(Text, nullable=True)
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last_message_at = Column(DateTime(timezone=True), server_default=func.now(), index=True)
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created_at = Column(DateTime(timezone=True), server_default=func.now())
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messages = relationship("ChatMessage", back_populates="session", cascade="all, delete-orphan")
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class ChatMessage(Base):
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__tablename__ = "lightrag_chat_messages_history"
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id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
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session_id = Column(UUID(as_uuid=True), ForeignKey("lightrag_chat_sessions_history.id", ondelete="CASCADE"), nullable=False)
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role = Column(String(20), nullable=False) # user, assistant, system
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content = Column(Text, nullable=False)
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token_count = Column(Integer, nullable=True)
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processing_time = Column(Float, nullable=True)
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created_at = Column(DateTime(timezone=True), server_default=func.now())
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session = relationship("ChatSession", back_populates="messages")
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citations = relationship("MessageCitation", back_populates="message", cascade="all, delete-orphan")
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class MessageCitation(Base):
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__tablename__ = "lightrag_message_citations_history"
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id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
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message_id = Column(UUID(as_uuid=True), ForeignKey("lightrag_chat_messages_history.id", ondelete="CASCADE"), nullable=False)
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source_doc_id = Column(String(255), nullable=False, index=True)
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file_path = Column(Text, nullable=False)
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chunk_content = Column(Text, nullable=True)
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relevance_score = Column(Float, nullable=True)
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message = relationship("ChatMessage", back_populates="citations")
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