def course_drop(CourseNum):
if isinstance(current_user._get_current_object(), Student):
Courses = current_user.Courses
course_selected = [Course_.CourseNum for Course_ in Courses]
if not CourseNum in course_selected:
flash('您未选择该门课程！')
else:
current_user.drop_course(CourseNum)
db.session.commit()
flash('您已成功退选该门课程。')
return redirect(url_for('course_select_table'))
def course_change(CourseNum):
if isinstance(current_user._get_current_object(), Student):
current_user.drop_course(CourseNum)
db.session.commit()
return redirect(url_for('course_teachers', CourseNum=CourseNum))
