make sure the CourseAccessRole Django ORM Admin page uses a raw_id so that we…

make sure the CourseAccessRole Django ORM Admin page uses a raw_id so that we don't populate millions of rows from the production database in the drop down list

common/djangoapps/student/admin.py

@@ -3,7 +3,7 @@ django admin pages for courseware model
 '''
 
 from student.models import UserProfile, UserTestGroup, CourseEnrollmentAllowed
-from student.models import CourseEnrollment, Registration, PendingNameChange, CourseAccessRole
+from student.models import CourseEnrollment, Registration, PendingNameChange, CourseAccessRole, CourseAccessRoleAdmin
 from ratelimitbackend import admin
 
 admin.site.register(UserProfile)
@@ -18,4 +18,4 @@ admin.site.register(Registration)
 
 admin.site.register(PendingNameChange)
 
-admin.site.register(CourseAccessRole)
+admin.site.register(CourseAccessRole, CourseAccessRoleAdmin)

common/djangoapps/student/models.py

@@ -45,6 +45,8 @@ from functools import total_ordering
 from certificates.models import GeneratedCertificate
 from course_modes.models import CourseMode
 
+from ratelimitbackend import admin
+
 unenroll_done = Signal(providing_args=["course_enrollment"])
 log = logging.getLogger(__name__)
 AUDIT_LOG = logging.getLogger("audit")
@@ -1048,6 +1050,9 @@ class CourseAccessRole(models.Model):
         return "[CourseAccessRole] user: {}   role: {}   org: {}   course: {}".format(self.user.username, self.role, self.org, self.course_id)
 
 
+class CourseAccessRoleAdmin(admin.ModelAdmin):
+    raw_id_fields = ("user",)
+
 #### Helper methods for use from python manage.py shell and other classes.