我如何使用adonis / node.js在leftJoin中进行区分？

Question

我正在尝试在leftJoin中进行区分，但是.distinct()似乎不适用于我的上下文。

我有这个查询：

const questions = Database
                                .query()
                                .select('book_unit_question.*')
                                .select('book_unit.unit')
                                .select('book_unit.sequence')
                                .select('books.id as book_id')
                                .select('book_unit_question_option.description as correct_answer_description_id')
                                .select('users.username')
                                .from('book_unit_question')
                                .leftJoin('book_unit_question_option', 'book_unit_question.id', 'book_unit_question_option.book_unit_question_id')
                                .distinct('book_unit_question.id')
                                .innerJoin('book_unit', 'book_unit.id', 'book_unit_question.book_unit_id')
                                .innerJoin('books', 'books.id', 'book_unit.book_id')
                                .innerJoin('users', 'book_unit_question.user_id', 'users.id')
                                .where('books.id', '=', request.params.id)

但是当我得到结果时，我已经重复book_unit_question.id了：

0: {id: 11, book_unit_id: 2, question_form: "Texto", option_form: "Texto",…}
1: {id: 11, book_unit_id: 2, question_form: "Texto", option_form: "Texto",…}
2: {id: 11, book_unit_id: 2, question_form: "Texto", option_form: "Texto",…}
3: {id: 12, book_unit_id: 2, question_form: "Texto", option_form: "Texto", type_answer: "Aberta",…}

我只需要：

0: {id: 11, book_unit_id: 2, question_form: "Texto", option_form: "Texto",…}
1: {id: 12, book_unit_id: 2, question_form: "Texto", option_form: "Texto", type_answer: "Aberta",…}