fix(models): resolve ambiguous foreign keys between User and InviteCode

app/models.py

@@ -23,7 +23,7 @@ class User(Base):
 
     profiles = relationship("Profile", back_populates="user", cascade="all, delete-orphan")
     sessions = relationship("UserSession", back_populates="user", cascade="all, delete-orphan")
-    invite_codes = relationship("InviteCode", back_populates="creator", cascade="all, delete-orphan")
+    invite_codes = relationship("InviteCode", back_populates="creator", foreign_keys="InviteCode.created_by", cascade="all, delete-orphan")
     invited_by_code = relationship("InviteCode", foreign_keys=[invited_by_code_id])
 
 
@@ -38,7 +38,7 @@ class InviteCode(Base):
     created_by = Column(Integer, ForeignKey("users.id", ondelete="SET NULL"), nullable=True)
     created_at = Column(DateTime, default=_utcnow)
 
-    creator = relationship("User", back_populates="invite_codes")
+    creator = relationship("User", back_populates="invite_codes", foreign_keys=[created_by])
     registered_users = relationship("User", back_populates="invited_by_code", foreign_keys="User.invited_by_code_id")
 
 

test_error.py

@@ -0,0 +1,8 @@
+from app.main import app  
+from fastapi.testclient import TestClient  
+c = TestClient(app)  
+import sqlite3  
+conn = sqlite3.connect('data.db')  
+cur = conn.execute('SELECT id, username, invited_by_code_id FROM users')  
+print(cur.fetchall())  
+conn.close()