帐号治理-帐号管理--更新

backend/app/crud/member.py

@@ -62,3 +62,8 @@ async def remove_member(db: AsyncSession, member: StudyMember) -> StudyMember:
     await db.commit()
     await db.refresh(member)
     return member
+
+
+async def user_has_memberships(db: AsyncSession, user_id: uuid.UUID) -> bool:
+    result = await db.execute(select(StudyMember.id).where(StudyMember.user_id == user_id))
+    return result.first() is not None

backend/app/crud/user.py

@@ -1,12 +1,13 @@
 import uuid
 from typing import Sequence
 
-from sqlalchemy import select, update
+from sqlalchemy import select, update, delete
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.core.security import hash_password
 from app.models.user import User
 from app.schemas.user import UserCreate, UserUpdate
+from app.models.study_member import StudyMember
 
 
 async def get_by_username(db: AsyncSession, username: str) -> User | None:
@@ -70,3 +71,9 @@ async def ensure_admin_exists(db: AsyncSession, *, default_password: str = "admi
     )
     db.add(new_admin)
     await db.commit()
+
+
+async def delete_user(db: AsyncSession, user: User) -> None:
+    await db.execute(delete(StudyMember).where(StudyMember.user_id == user.id))
+    await db.delete(user)
+    await db.commit()