初始版本

backend/app/models/__init__.py

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+"""
+数据库模型模块
+"""
+from .user import User
+from .todo import Todo
+from .post import Post
+from .transaction import Transaction
+from .media import Media, Tag, MediaTag
+from .chat import ChatMessage
+from .upload import Upload
+
+__all__ = [
+    "User",
+    "Todo",
+    "Post",
+    "Transaction",
+    "Media",
+    "Tag",
+    "MediaTag",
+    "ChatMessage",
+    "Upload",
+]
+

backend/app/models/media.py

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+"""
+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")
+

backend/app/models/post.py

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+"""
+博客文章模型
+"""
+from datetime import datetime
+from typing import Optional
+from sqlmodel import SQLModel, Field, Relationship
+from .user import User
+
+
+class Post(SQLModel, table=True):
+    """博客文章表"""
+    __tablename__ = "posts"
+    
+    id: Optional[int] = Field(default=None, primary_key=True)
+    title: str = Field(max_length=200)
+    slug: str = Field(max_length=200, index=True)
+    content: str  # 支持 Markdown
+    created_at: datetime = Field(default_factory=datetime.now)
+    updated_at: Optional[datetime] = Field(default=None)
+    user_id: int = Field(foreign_key="users.id", index=True)
+    
+    # 关系
+    user: Optional[User] = Relationship()
+

backend/app/models/tag.py

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+"""
+媒体标签模型
+"""
+from typing import Optional, TYPE_CHECKING
+from sqlmodel import SQLModel, Field, Relationship
+
+if TYPE_CHECKING:
+    from .media import Media, MediaTag
+else:
+    Media = "Media"
+    MediaTag = "MediaTag"
+
+
+class Tag(SQLModel, table=True):
+    """媒体标签表"""
+    __tablename__ = "tags"
+    
+    id: Optional[int] = Field(default=None, primary_key=True)
+    name: str = Field(max_length=50, unique=True, index=True)
+    
+    # 关系
+    media: list["Media"] = Relationship(back_populates="tags", link_model="MediaTag")
+

backend/app/models/todo.py

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+"""
+待办事项模型
+"""
+from datetime import datetime
+from typing import Optional
+from sqlmodel import SQLModel, Field, Relationship
+from .user import User
+
+
+class Todo(SQLModel, table=True):
+    """待办事项表"""
+    __tablename__ = "todos"
+    
+    id: Optional[int] = Field(default=None, primary_key=True)
+    title: str = Field(max_length=200)
+    done: bool = Field(default=False)
+    created_at: datetime = Field(default_factory=datetime.now)
+    user_id: int = Field(foreign_key="users.id", index=True)
+    
+    # 关系（可选，用于ORM查询）
+    user: Optional[User] = Relationship()
+

backend/app/models/transaction.py

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+"""
+记账记录模型
+"""
+from datetime import date
+from typing import Optional
+from decimal import Decimal
+from sqlmodel import SQLModel, Field, Relationship, Column
+from sqlalchemy import Numeric
+from .user import User
+
+
+class Transaction(SQLModel, table=True):
+    """记账记录表"""
+    __tablename__ = "transactions"
+    
+    id: Optional[int] = Field(default=None, primary_key=True)
+    amount: Decimal = Field(sa_column=Column(Numeric(10, 2)))  # 正数为收入，负数为支出
+    category: str = Field(max_length=50)
+    description: Optional[str] = Field(default=None, max_length=200)
+    date: date
+    user_id: int = Field(foreign_key="users.id", index=True)
+    
+    # 关系
+    user: Optional[User] = Relationship()
+

backend/app/models/upload.py

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+"""
+文件上传模型
+"""
+from datetime import datetime
+from typing import Optional
+from sqlmodel import SQLModel, Field, Relationship
+from .user import User
+
+
+class Upload(SQLModel, table=True):
+    """文件上传记录表"""
+    __tablename__ = "uploads"
+    
+    id: Optional[int] = Field(default=None, primary_key=True)
+    filename: str = Field(max_length=200)
+    stored_path: str = Field(max_length=300)
+    file_size: int  # 字节数
+    mime_type: str = Field(max_length=100)
+    uploaded_at: datetime = Field(default_factory=datetime.now)
+    expires_at: Optional[datetime] = Field(default=None)
+    user_id: int = Field(foreign_key="users.id", index=True)
+    
+    # 关系
+    user: Optional[User] = Relationship()
+

backend/app/models/user.py

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+"""
+用户模型
+"""
+from datetime import datetime
+from typing import Optional
+from sqlmodel import SQLModel, Field
+
+
+class User(SQLModel, table=True):
+    """用户表"""
+    __tablename__ = "users"
+    
+    id: Optional[int] = Field(default=None, primary_key=True)
+    username: str = Field(max_length=50, unique=True, index=True)
+    email: Optional[str] = Field(default=None, max_length=100, unique=True, index=True)
+    hashed_password: str
+    created_at: datetime = Field(default_factory=datetime.now)
+