Extra query with assoc and that make app slow

[ippachi]

class AuthorRepository < Hanami::Repository

  def add_book(author, data)
    assoc(:books, author).add(data)
  end
end

repository = AuthorRepository.new

AuthorRepository.new.add_book(repository.first, { title: 'book title' }) # this

above code issue three query.

SELECT "id", "name" FROM "authors" ORDER BY "authors"."id" LIMIT 1 
SELECT "id", "author_id", "title", "created_at", "updated_at" FROM "books" ORDER BY "books"."id" 
INSERT INTO "books" ("author_id", "title", "created_at", "updated_at") VALUES (1, 'title', '2019-03-26 16:45:50.253925+0000', '2019-03-26 16:45:50.253925+0000') 

I don't need second query because this make my application slow when record is increased.
Is this necessary?

[ippachi]

I notice this bug will be resolved by #509. So I close this issue.