初始版本

backend/app/models/media.py

@@ -0,0 +1,40 @@
+"""
+书影音收藏模型
+"""
+from datetime import datetime
+from typing import Optional, TYPE_CHECKING
+from sqlmodel import SQLModel, Field, Relationship
+from .user import User
+
+if TYPE_CHECKING:
+    from .tag import Tag
+else:
+    Tag = "Tag"
+
+
+class MediaTag(SQLModel, table=True):
+    """媒体-标签关联表"""
+    __tablename__ = "media_tags"
+    
+    media_id: int = Field(foreign_key="media.id", primary_key=True)
+    tag_id: int = Field(foreign_key="tags.id", primary_key=True)
+
+
+class Media(SQLModel, table=True):
+    """书影音收藏表"""
+    __tablename__ = "media"
+    
+    id: Optional[int] = Field(default=None, primary_key=True)
+    title: str = Field(max_length=200)
+    media_type: str = Field(max_length=20)  # book / movie / music
+    rating: Optional[float] = Field(default=None, ge=0.0, le=5.0)
+    comment: Optional[str] = Field(default=None)
+    external_id: Optional[str] = Field(default=None, max_length=100)  # ISBN、IMDb ID等
+    cover_url: Optional[str] = Field(default=None, max_length=300)
+    created_at: datetime = Field(default_factory=datetime.now)
+    user_id: int = Field(foreign_key="users.id", index=True)
+    
+    # 关系
+    user: Optional[User] = Relationship()
+    tags: list["Tag"] = Relationship(back_populates="media", link_model="MediaTag")
+