def delete(self, student_id):

        student = StudentModel()
        student_by_id = student.query.get(student_id)
        db_session.delete(student_by_id)
        db_session.commit()
        return redirect('student_test')
    def delete(self, student_id):
        "delete student record"
        student = StudentModel()
        student_delete = student.query.get(student_id)
        db_session.delete(student_delete)

        return redirect(url_for('student_view'))