Fix studio for users with derived roles and some other related changes [BB-7834]

common/djangoapps/student/roles.py

@@ -7,6 +7,7 @@
 import logging
 from abc import ABCMeta, abstractmethod
 from collections import defaultdict
+from contextlib import contextmanager
 
 from django.contrib.auth.models import User  # lint-amnesty, pylint: disable=imported-auth-user
 from opaque_keys.edx.django.models import CourseKeyField
@@ -44,6 +45,21 @@ def register_access_role(cls):
     return cls
 
 
+@contextmanager
+def strict_role_checking():
+    """
+    Context manager that temporarily disables role inheritance.
+
+    You may want to use it to check if a user has a base role. For example, if a user has `CourseLimitedStaffRole`,
+    by enclosing `has_role` call with this context manager, you can check it has the `CourseStaffRole` too. This is
+    useful when derived roles have less permissions than their base roles, but users can have both roles at the same.
+    """
+    OLD_ACCESS_ROLES_INHERITANCE = ACCESS_ROLES_INHERITANCE.copy()
+    ACCESS_ROLES_INHERITANCE.clear()
+    yield
+    ACCESS_ROLES_INHERITANCE.update(OLD_ACCESS_ROLES_INHERITANCE)
+
+
 class BulkRoleCache:  # lint-amnesty, pylint: disable=missing-class-docstring
     CACHE_NAMESPACE = "student.roles.BulkRoleCache"
     CACHE_KEY = 'roles_by_user'
@@ -78,7 +94,7 @@ def __init__(self, user):
             )
 
     @staticmethod
-    def _get_roles(role):
+    def get_roles(role):
         """
         Return the roles that should have the same permissions as the specified role.
         """
@@ -90,7 +106,7 @@ def has_role(self, role, course_id, org):
         or a role that inherits from the specified role, course_id and org.
         """
         return any(
-            access_role.role in self._get_roles(role) and
+            access_role.role in self.get_roles(role) and
             access_role.course_id == course_id and
             access_role.org == org
             for access_role in self._roles
@@ -463,11 +479,11 @@ def remove_courses(self, *course_keys):
 
     def courses_with_role(self):
         """
-        Return a django QuerySet for all of the courses with this user x role. You can access
+        Return a django QuerySet for all of the courses with this user x (or derived from x) role. You can access
         any of these properties on each result record:
         * user (will be self.user--thus uninteresting)
         * org
         * course_id
         * role (will be self.role--thus uninteresting)
         """
-        return CourseAccessRole.objects.filter(role=self.role, user=self.user)
+        return CourseAccessRole.objects.filter(role__in=RoleCache.get_roles(self.role), user=self.user)

lms/djangoapps/courseware/rules.py

@@ -18,7 +18,7 @@
 from openedx.core.djangoapps.content.course_overviews.models import CourseOverview
 from openedx.core.djangoapps.enrollments.api import is_enrollment_valid_for_proctoring
 from common.djangoapps.student.models import CourseAccessRole
-from common.djangoapps.student.roles import CourseRole, OrgRole
+from common.djangoapps.student.roles import CourseRole, OrgRole, strict_role_checking
 from xmodule.course_block import CourseBlock  # lint-amnesty, pylint: disable=wrong-import-order
 from xmodule.error_block import ErrorBlock  # lint-amnesty, pylint: disable=wrong-import-order
 
@@ -47,10 +47,14 @@ class HasAccessRule(Rule):
     """
     A rule that calls `has_access` to determine whether it passes
     """
-    def __init__(self, action):
+    def __init__(self, action, strict=False):
         self.action = action
+        self.strict = strict
 
     def check(self, user, instance=None):
+        if self.strict:
+            with strict_role_checking():
+                return has_access(user, self.action, instance)
         return has_access(user, self.action, instance)
 
     def query(self, user):

lms/djangoapps/instructor/permissions.py

@@ -29,6 +29,8 @@
 RESCORE_EXAMS = 'instructor.rescore_exams'
 VIEW_REGISTRATION = 'instructor.view_registration'
 VIEW_DASHBOARD = 'instructor.dashboard'
+VIEW_ENROLLMENTS = 'instructor.view_enrollments'
+VIEW_FORUM_MEMBERS = 'instructor.view_forum_members'
 
 
 perms[ALLOW_STUDENT_TO_BYPASS_ENTRANCE_EXAM] = HasAccessRule('staff')
@@ -60,3 +62,5 @@
         'instructor',
         'data_researcher'
 ) | HasAccessRule('staff') | HasAccessRule('instructor')
+perms[VIEW_ENROLLMENTS] = HasAccessRule('staff')
+perms[VIEW_FORUM_MEMBERS] = HasAccessRule('staff')

lms/djangoapps/instructor/views/api.py

@@ -1661,7 +1661,7 @@ def get_anon_ids(request, course_id):
 @require_POST
 @ensure_csrf_cookie
 @cache_control(no_cache=True, no_store=True, must_revalidate=True)
-@require_course_permission(permissions.CAN_ENROLL)
+@require_course_permission(permissions.VIEW_ENROLLMENTS)
 @require_post_params(
     unique_student_identifier="email or username of student for whom to get enrollment status"
 )
@@ -2611,7 +2611,7 @@ def problem_grade_report(request, course_id):
 @require_POST
 @ensure_csrf_cookie
 @cache_control(no_cache=True, no_store=True, must_revalidate=True)
-@require_course_permission(permissions.CAN_ENROLL)
+@require_course_permission(permissions.VIEW_FORUM_MEMBERS)
 @require_post_params('rolename')
 def list_forum_members(request, course_id):
     """