53 lines
2.4 KiB
Python
53 lines
2.4 KiB
Python
import datetime
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import uuid
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from sqlalchemy import Column, Integer, String, DateTime, Boolean, Index, JSON
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from sqlalchemy.dialects.postgresql import UUID
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from app.db import Base
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class GenericFile(Base):
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"""
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通用文件模型，支持多种上传上下文（头像、应用图标、知识库文件、临时文件等）
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"""
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__tablename__ = "generic_files"
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# 主键和租户信息
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id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4, index=True, comment="文件唯一标识")
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tenant_id = Column(UUID(as_uuid=True), nullable=False, index=True, comment="租户ID")
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created_by = Column(UUID(as_uuid=True), nullable=False, index=True, comment="创建者用户ID")
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# 文件基本信息
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file_name = Column(String, nullable=False, comment="原始文件名")
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file_ext = Column(String, nullable=False, index=True, comment="文件扩展名")
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file_size = Column(Integer, nullable=False, comment="文件大小（字节）")
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mime_type = Column(String, nullable=True, comment="MIME类型")
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# 上传上下文
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context = Column(String, nullable=False, index=True, comment="上传上下文（avatar/app_icon/knowledge_base/temp/attachment）")
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# 存储信息
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storage_path = Column(String, nullable=False, comment="文件存储路径")
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# 元数据（JSON格式，存储业务相关信息）
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file_metadata = Column(JSON, nullable=True, default={}, comment="业务元数据")
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# 状态和访问控制
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status = Column(String, default="active", index=True, comment="文件状态（active/processing/deleted）")
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is_public = Column(Boolean, default=False, comment="是否公开访问")
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access_url = Column(String, nullable=True, comment="访问URL")
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# 引用计数（用于判断文件是否可以删除）
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reference_count = Column(Integer, default=0, comment="引用计数")
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# 时间戳
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created_at = Column(DateTime, default=datetime.datetime.now, comment="创建时间")
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updated_at = Column(DateTime, default=datetime.datetime.now, onupdate=datetime.datetime.now, comment="更新时间")
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deleted_at = Column(DateTime, nullable=True, comment="删除时间（软删除）")
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# 复合索引
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__table_args__ = (
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Index('idx_tenant_context', 'tenant_id', 'context'),
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Index('idx_tenant_status', 'tenant_id', 'status'),
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Index('idx_created_at', 'created_at'),
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)
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