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我的rails控制器中有这个动作,

 def step_submit
   validate_user()
   @owning = @user.create_user_car_transaction(Variant.find(params[:variant]),   params[:details], params[:address], params[:somethin1])
   Contact.user_contact(current_user, params[:contact]) if @user.contact.nil?
   redirect_to "/next_step"
end

我使用 codeClimate 来检查代码的质量..

它显示了这个动作的复杂性〜30 ..我实际上打破了一个非常巨大的方法......我怎样才能降低这种复杂性?

这些是动作调用的不同方法

def self.user_contact(user, contact_hash = nil)
 contact = user.contact || user.create_contact()
 contact.update_attributes(contact_hash) if contact_hash.present?
 contact
end

def validate_user
 if params[:user] && current_user.nil?
   user = User.create(params[:user])
   sign_in user
 end
end

def create_user_car_transaction(car, details_hash, address_hash, coupon_hash = nil)
 transaction = self.transactions.create()

 car.transaction_item = transaction.transaction_items.create()
 car.save

 payment_hash = details_hash
 payment_hash.merge!(address_hash)
 payment = transaction.create_payment(payment_hash)

 transaction.update_attributes(:status=>"1") if transaction.status.nil?

 transaction
end
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