113 lines
4.2 KiB
Python
113 lines
4.2 KiB
Python
import time
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from sqlalchemy import JSON, Column, DateTime, ForeignKey, Integer, String, Text
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from sqlalchemy.orm import relationship
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from sqlalchemy.sql import func
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from server.models import Base
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class KnowledgeDatabase(Base):
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"""知识库模型"""
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__tablename__ = "knowledge_databases"
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id = Column(Integer, primary_key=True, autoincrement=True)
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db_id = Column(String, nullable=False, unique=True, index=True) # 数据库ID
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name = Column(String, nullable=False) # 数据库名称
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description = Column(Text, nullable=True) # 描述
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embed_model = Column(String, nullable=True) # 嵌入模型名称
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dimension = Column(Integer, nullable=True) # 向量维度
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meta_info = Column(JSON, nullable=True) # 元数据
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created_at = Column(DateTime, default=func.now()) # 创建时间
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# 关系
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files = relationship("KnowledgeFile", back_populates="database", cascade="all, delete-orphan")
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def to_dict(self, with_nodes=True):
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"""转换为字典格式，确保meta_info映射为metadata"""
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result = {
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"id": self.id,
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"db_id": self.db_id,
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"name": self.name,
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"description": self.description,
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"embed_model": self.embed_model,
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"dimension": self.dimension,
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"metadata": self.meta_info or {},
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"created_at": self.created_at.isoformat() if self.created_at else None,
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}
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# 添加文件信息
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if self.files:
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result["files"] = {file.file_id: file.to_dict(with_nodes=with_nodes) for file in self.files}
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else:
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result["files"] = {}
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return result
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class KnowledgeFile(Base):
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"""知识库文件模型"""
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__tablename__ = "knowledge_files"
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id = Column(Integer, primary_key=True, autoincrement=True)
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file_id = Column(String, nullable=False, index=True) # 文件ID
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database_id = Column(String, ForeignKey("knowledge_databases.db_id"), nullable=False) # 所属数据库ID
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filename = Column(String, nullable=False) # 文件名
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path = Column(String, nullable=False) # 文件路径
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file_type = Column(String, nullable=False) # 文件类型
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status = Column(String, nullable=False) # 处理状态
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created_at = Column(DateTime, default=func.now()) # 创建时间
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# 关系
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database = relationship("KnowledgeDatabase", back_populates="files")
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nodes = relationship("KnowledgeNode", back_populates="file", cascade="all, delete-orphan")
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@property
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def computed_node_count(self):
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"""动态计算节点数量"""
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return len(self.nodes) if self.nodes is not None else 0
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def to_dict(self, with_nodes=True):
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"""转换为字典格式"""
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result = {
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"file_id": self.file_id,
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"filename": self.filename,
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"path": self.path,
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"type": self.file_type,
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"status": self.status,
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"node_count": self.computed_node_count,
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"created_at": self.created_at.timestamp() if self.created_at else time.time(),
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}
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if with_nodes:
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result["nodes"] = [node.to_dict() for node in self.nodes] if self.nodes else []
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return result
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class KnowledgeNode(Base):
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"""知识块模型"""
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__tablename__ = "knowledge_nodes"
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id = Column(Integer, primary_key=True, autoincrement=True)
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file_id = Column(String, ForeignKey("knowledge_files.file_id"), nullable=False) # 所属文件ID
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text = Column(Text, nullable=False) # 文本内容
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hash = Column(String, nullable=True) # 文本哈希值
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start_char_idx = Column(Integer, nullable=True) # 开始字符索引
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end_char_idx = Column(Integer, nullable=True) # 结束字符索引
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meta_info = Column(JSON, nullable=True) # 元数据
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# 关系
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file = relationship("KnowledgeFile", back_populates="nodes")
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def to_dict(self):
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"""转换为字典格式，确保meta_info映射为metadata"""
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return {
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"id": self.id,
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"file_id": self.file_id,
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"text": self.text,
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"hash": self.hash,
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"start_char_idx": self.start_char_idx,
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"end_char_idx": self.end_char_idx,
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"metadata": self.meta_info or {}, # 确保映射正确
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}
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