通过关系表删除东西

Question

我有4个型号。我想删除问题，但现在我不能。不知道为什么知道。我想，首先，我需要删除这个问题的答案，然后删除查询，然后问题本身。对。但我怎么能做到这一点？

有我的模型：

-respondents_model

class Respondent < ActiveRecord::Base 
    has_many :inquiries 
    has_many :questions, :through => :inquiries 
    has_many :answers, :through => :inquiries 
end 

-answer_model

class Answer < ActiveRecord::Base 
    belongs_to :inquiry 
    belongs_to :question 

    validates_uniqueness_of :inquiry_id 
end 

-question_model

class Question < ActiveRecord::Base 
    has_one :answer, :through => :inquiry , :dependent => :destroy 
    belongs_to :inquiry , :dependent => :destroy 
end 

-inquiry_model

class Inquiry < ActiveRecord::Base 
    belongs_to :question 
    belongs_to :respondent 
    has_one :answer 
end 

和我question_controller

def destroy 
    @question.destroy 
    head :ok 
    end 

Answer 1

您不必删除答案，因为他们将尽可能设置:dependent => :destroy被自动删除。所以，你只需要调用：

还需要指定什么确切的问题，你要毁灭：Question.find params[:id]

def destroy 
    @question = Question.find params[:id] 
    @question.destroy 
    head :ok 
end