def get_submission_and_student(uuid, read_replica=False):
<EOL>submission = get_submission(uuid, read_replica=read_replica)<EOL>cache_key = "<STR_LIT>".format(submission['<STR_LIT>'])<EOL>try:<EOL><INDENT>cached_student_item = cache.get(cache_key)<EOL><DEDENT>except Exception:<EOL><INDENT>logger.exception("<STR_LIT>")<EOL>cached_student_item = None<EOL><DEDENT>if cached_student_item is not None:<EOL><INDENT>submission['<STR_LIT>'] = cached_student_item<EOL><DEDENT>else:<EOL><INDENT>try:<EOL><INDENT>student_item_qs = StudentItem.objects<EOL>if read_replica:<EOL><INDENT>student_item_qs = _use_read_replica(student_item_qs)<EOL><DEDENT>student_item = student_item_qs.get(id=submission['<STR_LIT>'])<EOL>submission['<STR_LIT>'] = StudentItemSerializer(student_item).data<EOL>cache.set(cache_key, submission['<STR_LIT>'])<EOL><DEDENT>except Exception as ex:<EOL><INDENT>err_msg = "<STR_LIT>".format(ex)<EOL>logger.exception(err_msg)<EOL>raise SubmissionInternalError(err_msg)<EOL><DEDENT><DEDENT>return submission<EOL>
Retrieve a submission by its unique identifier, including the associated student item.

Args:
    uuid (str): the unique identifier of the submission.

Kwargs:
    read_replica (bool): If true, attempt to use the read replica database.
        If no read replica is available, use the default database.

Returns:
    Serialized Submission model (dict) containing a serialized StudentItem model

Raises:
    SubmissionNotFoundError: Raised if the submission does not exist.
    SubmissionRequestError: Raised if the search parameter is not a string.
    SubmissionInternalError: Raised for unknown errors.