feat: 初始化工程

models/base.py

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+from sqlalchemy import Column, BigInteger, DateTime, event
+from sqlalchemy.ext.declarative import declared_attr
+
+from config.database import Base
+from datetime import datetime
+
+from utils.common import camel_to_snake
+from id_generator import options, generator
+
+# https://github.com/yitter/IdGenerator/tree/master/Python
+options = options.IdGeneratorOptions(worker_id=23)
+idgen = generator.DefaultIdGenerator()
+idgen.set_id_generator(options)
+
+
+# 第二层基类：包含ID
+class IdBase(Base):
+    __abstract__ = True
+
+    id = Column(BigInteger, primary_key=True, index=True)
+
+    @declared_attr
+    def __tablename__(cls):
+        # 自动把数据库实体类名驼峰转为数据库表名下划线
+        return camel_to_snake(cls.__name__)
+
+
+# 自动填充id
+@event.listens_for(IdBase, 'before_insert', propagate=True)
+def before_insert_listener(mapper, connection, target):
+    if target.id is None:
+        target.id = idgen.next_id()
+
+
+# 第二层基类：包含ID和审计字段
+class AuditBase(IdBase):
+    __abstract__ = True
+
+    create_time = Column(DateTime, nullable=True, default=datetime.now)
+    update_time = Column(DateTime, nullable=True, default=datetime.now, onupdate=datetime.now)
+

models/family.py

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+from sqlalchemy import Column, JSON, String, Text, Integer, BigInteger, ForeignKey
+from sqlalchemy.orm import relationship, Mapped
+
+from models.base import AuditBase
+
+
+class Users(AuditBase):
+    name = Column(String(45), nullable=False, comment="昵称")
+    avatar = Column(String(255), nullable=True, comment="头像")
+
+    records: Mapped[list["Records"]] = relationship("Records", back_populates="user")
+
+
+class Records(AuditBase):
+    user_id = Column(BigInteger, ForeignKey("users.id"), nullable=False, comment="用户id")
+    content = Column(Text, nullable=False, comment="内容")
+    image_list = Column(JSON, nullable=True, default=list, comment="图片")
+    video_list = Column(JSON, nullable=True, default=list, comment="视频")
+    like_count = Column(Integer, nullable=True, default=0, comment="点赞数")
+    comment_count = Column(Integer, nullable=True, default=0, comment="评论数")
+
+    user: Mapped["Users"] = relationship("Users", back_populates="records")
+    comments: Mapped[list["Comments"]] = relationship(
+        "Comments",
+        back_populates="record",
+        lazy="selectin",
+    )
+
+
+class Likes(AuditBase):
+    record_id = Column(BigInteger, ForeignKey("records.id"), nullable=False, comment="记录id")
+    user_id = Column(BigInteger, ForeignKey("users.id"), nullable=False, comment="用户id")
+
+
+class Comments(AuditBase):
+    record_id = Column(BigInteger, ForeignKey("records.id"), nullable=False, comment="记录id")
+    user_id = Column(BigInteger, ForeignKey("users.id"), nullable=False, comment="用户id")
+    content = Column(String(255), nullable=False, comment="内容")
+
+    record: Mapped["Records"] = relationship("Records", back_populates="comments")
+    user: Mapped["Users"] = relationship("Users")  # ← 就加了这一行