thực hiện phân quyền admin giáo viên và học sinh xong

backend/app/models.py

@@ -1,6 +1,9 @@
 from datetime import datetime, timezone
+import enum
+
 from sqlalchemy import (
     Column,
+    Enum,
     Integer,
     String,
     Text,
@@ -13,6 +16,18 @@ from sqlalchemy.orm import relationship
 from .database import Base
 
 
+class UserRole(str, enum.Enum):
+    admin = "admin"
+    teacher = "teacher"
+    student = "student"
+
+
+class UserStatus(str, enum.Enum):
+    pending = "pending"
+    approved = "approved"
+    rejected = "rejected"
+
+
 class User(Base):
     __tablename__ = "users"
 
@@ -20,6 +35,8 @@ class User(Base):
     username = Column(String(64), unique=True, nullable=False, index=True)
     email = Column(String(255), unique=True, nullable=False, index=True)
     password_hash = Column(String(255), nullable=False)
+    role = Column(Enum(UserRole, name="user_role"), nullable=False, default=UserRole.student)
+    status = Column(Enum(UserStatus, name="user_status"), nullable=False, default=UserStatus.pending)
     created_at = Column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), nullable=False)
 
     # Relationships