thực hiện phân quyền admin giáo viên và học sinh xong

backend/alembic/versions/0002_add_role_status.py

@@ -0,0 +1,49 @@
+"""add role and status to users
+
+Revision ID: 0002_add_role_status
+Revises: 0001_initial_schema
+Create Date: 2026-04-01
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = "0002_add_role_status"
+down_revision = "0001"
+branch_labels = None
+depends_on = None
+
+user_role = postgresql.ENUM("admin", "teacher", "student", name="user_role")
+user_status = postgresql.ENUM("pending", "approved", "rejected", name="user_status")
+
+
+def upgrade() -> None:
+    user_role.create(op.get_bind(), checkfirst=True)
+    user_status.create(op.get_bind(), checkfirst=True)
+
+    op.add_column(
+        "users",
+        sa.Column(
+            "role",
+            sa.Enum("admin", "teacher", "student", name="user_role"),
+            nullable=False,
+            server_default="student",
+        ),
+    )
+    op.add_column(
+        "users",
+        sa.Column(
+            "status",
+            sa.Enum("pending", "approved", "rejected", name="user_status"),
+            nullable=False,
+            server_default="pending",
+        ),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("users", "status")
+    op.drop_column("users", "role")
+    user_role.drop(op.get_bind(), checkfirst=True)
+    user_status.drop(op.get_bind(), checkfirst=True)