通過關係表刪除東西

Question

我有4個型號。我想刪除問題，但現在我不能。不知道爲什麼知道。我想，首先，我需要刪除這個問題的答案，然後刪除查詢，然後問題本身。對。但我怎麼能做到這一點？

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

您不必刪除答案，因爲他們將盡可能設置:dependent => :destroy被自動刪除。所以，你只需要調用：

還需要指定什麼確切的問題，你要毀滅：Question.find params[:id]

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