project & library table

app/models/library.py

@@ -0,0 +1,23 @@
+from sqlalchemy import Column, DateTime, String, ForeignKey, BigInteger
+from sqlalchemy.sql import func
+from .base import AutoID, Base
+
+class LibraryItem(Base, AutoID):
+    """工作区共享媒体/文件资源库"""
+    __tablename__ = "library_items"
+
+    workspace_id = Column(String(32), ForeignKey("workspaces.id", ondelete="CASCADE"), index=True)
+    # 自引用外键，支持无限级文件夹嵌套
+    parent_id = Column(String(32), ForeignKey("library_items.id", ondelete="CASCADE"), nullable=True, index=True)
+    
+    name = Column(String, nullable=False)
+    # 节点类型：'folder' (文件夹) 或 'file' (真实文件)
+    item_type = Column(String, default="file", nullable=False)
+
+    # --- 以下为真实文件（item_type='file'）的核心字段 ---
+    s3_key = Column(String, nullable=True)        # S3 中的 Object Key
+    file_size = Column(BigInteger, nullable=True)  # 文件大小（字节数 Bytes），用于统计容量占用
+    mime_type = Column(String, nullable=True)      # 媒体类型，例如 'image/jpeg', 'video/mp4', 'application/pdf'
+    
+    uploaded_by = Column(String(32), ForeignKey("users.id", ondelete="SET NULL"), nullable=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())