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铁路——制作或更新记录。 声明如经发现或产生
原标题:Rails - Create or Update Record .... If statement vs find or create by

@user = User.find(1)
@event = Event.find(1)
for interest in @event.interests
  @user.choices.create(:interest => interest, :score => 1)
end

适当开展工作,但每次都制作记录。 我愿检查一下,是否存在与 lo亲相应利益相关的记录,以及我是否希望更新,否则就会产生罚款。

我研究并找到了“经过限定的_或_create_by”方法,但并未真正为我工作。 I has =>

 @user.choices.find_or_create_by_interest(:interest => interest.id, :score => 1) 

并得出错误“未经界定的方法`定型_by_ interest'。

你们能看看一下我做什么错了吗? 还是最好坚持一种说法吗?

我确信,根据这一方法,发现的“或_create_by”方法是否具有更新的特性。

最佳回答

页: 1

问题回答

如果我不理解你试图实现以下目标:

find_or_create_by_interest_id(:interest => interest.id) { |u| u.score = 1 }




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