初始提交：极码 GeekCode 全栈项目（FastAPI + Vue3）

backend/models/like.py

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+"""点赞/收藏模型"""
+from sqlalchemy import Column, Integer, DateTime, ForeignKey, UniqueConstraint
+from sqlalchemy.sql import func
+from database import Base
+
+
+class Like(Base):
+    __tablename__ = "likes"
+
+    id = Column(Integer, primary_key=True, index=True)
+    post_id = Column(Integer, ForeignKey("posts.id"), nullable=False, index=True)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+
+    __table_args__ = (
+        UniqueConstraint("post_id", "user_id", name="uq_like_post_user"),
+    )
+
+
+class Collect(Base):
+    __tablename__ = "collects"
+
+    id = Column(Integer, primary_key=True, index=True)
+    post_id = Column(Integer, ForeignKey("posts.id"), nullable=False, index=True)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+
+    __table_args__ = (
+        UniqueConstraint("post_id", "user_id", name="uq_collect_post_user"),
+    )
+
+
+class ProjectCollect(Base):
+    """开源项目收藏"""
+    __tablename__ = "project_collects"
+
+    id = Column(Integer, primary_key=True, index=True)
+    project_id = Column(Integer, ForeignKey("projects.id"), nullable=False, index=True)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+
+    __table_args__ = (
+        UniqueConstraint("project_id", "user_id", name="uq_project_collect_user"),
+    )