我有...
/app/models/input.rb：
class Input < ActiveRecord::Base
has_many :questions, :dependent => :destroy
after_commit :create_matching_questions
def create_matching_questions
@element_id = Element.all.select{|e| e.meta == true}.first.id
@standard_id = Standard.all.select{|s| s.meta == true}.first.id
@description = ["Does the site stock ", self.name, "?"].join
Product.all.each do |product|
@question = product.questions.find_or_create_by_element_id_and_standard_id_and_description!(@element_id, @standard_id, @description)
self.questions << @question
@question.fields.find_or_create_by_name("The site sells this product and it is in stock")
@question.fields.find_or_create_by_name("The site sells this product but it is not in stock")
@question.fields.find_or_create_by_name("The site does not sell this product")
@question.update_attributes :active => true
end
return true
end
end
/app/models/question.rb：
class Question < ActiveRecord::Base
belongs_to :input
after_commit :create_matching_surveys
def create_matching_surveys
if self.active == true
self.reload.product.reviews.each do |review|
review.competitors.each do |competitor|
(1..self.iterations).each do |iteration|
survey = competitor.surveys.find_or_create_by_question_id_and_iteration!(self.id, iteration)
survey.save
end
end
end
return true
else
self.destroy_matching_surveys
end
end
def destroy_matching_surveys
self.surveys.each do |survey|
survey.destroy if survey.question_id == self.id
end
return true
end
end
那为什么我会...
> @finance = Good.create! :name => "Finance"
=> #<Good id: 6, name: "Finance", created_at: "2013-06-13 02:56:20", updated_at: "2013-06-13 02:56:20">
> @super = Input.create! :name => "Superannuation"
=> #<Input id: 11, name: "Superannuation", mispelling: nil, typo: nil, created_at: "2013-06-13 02:56:28", updated_at: "2013-06-13 02:56:28">
> @first = @super.questions.first
=> #<Question id: 48, standard_id: 1, description: "Does the site stock Superannuation?", element_id: 2, condition_id: nil, blueprint_name: nil, blueprint_url: nil, additive: false, instructions: nil, created_at: "2013-06-13 02:56:41", updated_at: "2013-06-13 02:56:41", active: false, postscript: "<p>If you have any comments about this question or ...", iterations: 1, product_id: 1, precondition_id: nil, input_id: 11>
> @last = @super.questions.last
=> #<Question id: 60, standard_id: 1, description: "Does the site stock Superannuation?", element_id: 2, condition_id: nil, blueprint_name: nil, blueprint_url: nil, additive: false, instructions: nil, created_at: "2013-06-13 02:56:43", updated_at: "2013-06-13 02:56:43", active: false, postscript: "<p>If you have any comments about this question or ...", iterations: 1, product_id: 23, precondition_id: nil, input_id: 11>
> @super.destroy
=> #<Input id: 11, name: "Superannuation", mispelling: nil, typo: nil, created_at: "2013-06-13 02:56:28", updated_at: "2013-06-13 02:56:28">
> @super.destroyed?
=> true
> @first.destroyed?
=> false
> @last.destroyed?
=> false
当然@first并且@last应该自动销毁？