修复了循环引用的问题

models.py

@@ -3,7 +3,7 @@
 # @Author  : 河瞬
 # @FileName: models.py
 # @Software: PyCharm
-from sqlalchemy import create_engine, Column, Integer, String, DateTime, Enum, ForeignKey, Text
+from sqlalchemy import create_engine, Column, Integer, String, DateTime, ForeignKey, Text
 from sqlalchemy.orm import relationship, sessionmaker, declarative_base
 from datetime import datetime
 
@@ -15,17 +15,18 @@ class Tenant(Base):
     __tablename__ = 'Tenant'
     id = Column(Integer, primary_key=True)
     name = Column(String(100), nullable=False)
-    users = relationship('User', backref='Tenant', cascade='all, delete-orphan')
-    projects = relationship('Project', backref='Tenant', cascade='all, delete-orphan')
+    users = relationship('User', back_populates='tenant', cascade='all, delete-orphan')
+    projects = relationship('Project', back_populates='owner', cascade='all, delete-orphan')
 
 
 class User(Base):
     __tablename__ = 'User'
     id = Column(Integer, primary_key=True)
-    name = Column(String(100), nullable=False)
+    username = Column(String(100), nullable=False)
     password = Column(String(100), nullable=False)
     role = Column(Integer, nullable=False)  # 0: 超级管理员 1：租户管理员 2：评估员 3：审核员
     tenant_id = Column(Integer, ForeignKey('Tenant.id'), nullable=False)
+    tenant = relationship('Tenant', back_populates='users')
 
 
 class Project(Base):
@@ -36,7 +37,7 @@ class Project(Base):
     start_time = Column(DateTime, nullable=False, default=datetime.utcnow)
     deadline = Column(DateTime, nullable=False)
     owner_id = Column(Integer, ForeignKey('Tenant.id'), nullable=False)
-    # owner = relationship('Tenant', backref='projects')
+    owner = relationship('Tenant', back_populates='projects')
 
 
 if __name__ == "__main__":
@@ -47,4 +48,4 @@ if __name__ == "__main__":
     Base.metadata.create_all(engine)
 
     # 创建会话
-    SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+    SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)