25e67370cd
clear_student_state(), a method defined by ORA, requires information about the user making the request. Since this xblock is not bound, we must provide that information explicitly.
89 lines
3.1 KiB
Python
89 lines
3.1 KiB
Python
"""
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Implementation of "Instructor" service
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"""
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import logging
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from opaque_keys import InvalidKeyError
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from opaque_keys.edx.keys import CourseKey, UsageKey
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from courseware.models import StudentModule
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from instructor.views.tools import get_student_from_identifier
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from django.core.exceptions import ObjectDoesNotExist
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import instructor.enrollment as enrollment
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from student.roles import CourseStaffRole
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from student import auth
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log = logging.getLogger(__name__)
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class InstructorService(object):
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"""
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Instructor service for deleting the students attempt(s) of an exam. This service has been created
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for the edx_proctoring's dependency injection to cater for a requirement where edx_proctoring
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needs to call into edx-platform's functions to delete the students' existing answers, grades
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and attempt counts if there had been an earlier attempt.
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"""
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def delete_student_attempt(self, student_identifier, course_id, content_id, requesting_user):
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"""
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Deletes student state for a problem. requesting_user may be kept as an audit trail.
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Takes some of the following query parameters
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- student_identifier is an email or username
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- content_id is a url-name of a problem
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- course_id is the id for the course
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"""
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course_id = CourseKey.from_string(course_id)
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try:
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student = get_student_from_identifier(student_identifier)
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except ObjectDoesNotExist:
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err_msg = (
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'Error occurred while attempting to reset student attempts for user '
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'{student_identifier} for content_id {content_id}. '
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'User does not exist!'.format(
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student_identifier=student_identifier,
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content_id=content_id
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)
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)
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log.error(err_msg)
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return
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try:
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module_state_key = UsageKey.from_string(content_id)
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except InvalidKeyError:
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err_msg = (
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'Invalid content_id {content_id}!'.format(content_id=content_id)
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)
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log.error(err_msg)
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return
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if student:
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try:
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enrollment.reset_student_attempts(
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course_id,
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student,
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module_state_key,
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requesting_user=requesting_user,
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delete_module=True,
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)
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except (StudentModule.DoesNotExist, enrollment.sub_api.SubmissionError):
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err_msg = (
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'Error occurred while attempting to reset student attempts for user '
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'{student_identifier} for content_id {content_id}.'.format(
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student_identifier=student_identifier,
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content_id=content_id
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)
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)
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log.error(err_msg)
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def is_course_staff(self, user, course_id):
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"""
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Returns True if the user is the course staff
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else Returns False
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"""
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return auth.user_has_role(user, CourseStaffRole(CourseKey.from_string(course_id)))
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