在每列節省模式，節省的進度值

Question

我有一個名爲CommonApp模型，並在其上的功能，產生的進度％的基礎上，如何有多少用戶已經填寫。

你可以在這裏查看進度功能 - >

def progress 
    total_questions = self.attribute_names.count + 2 

    # +4 for name, cities,industries,positions, associated models 
    # -4 for id, created_at, updated_at, user_id these will always be filled anyways 
    # +2 for video, associated model, but weighed more heavily 

    total_completed = 0 

    self.attribute_names.each do |attr| 
    total_completed += 1 unless self[attr].blank? 
    end 

    total_completed = total_completed - 3 
    # +1 name (on user table, not on here 
    # -4 for id, created_at, updated_at, user_id 

    total_completed += 1 if self.cities.any? 
    total_completed += 1 if self.positions.any? 
    total_completed += 1 if self.industries.any? 
    total_completed += 2 if self.user.video 

    (100.0*total_completed/total_questions).round 

end 

我想以後排序的進步，所以這意味着，我認爲做到這一點的最好辦法是有一個列CommonApp叫進步，更新任何時候進度改變時，該列的值。

我該怎麼做？

更新 我正在考慮更多沿着下面的行，這將更新每次進度函數運行，並與進度欄的值不同。但是，我得到的錯誤 -

undefined method `save!' for 93:Fixnum 

這是最新進展功能

def progress 
    total_questions = self.attribute_names.count + 2 

    # +4 for name, cities,industries,positions 
    # -4 for id, created_at, updated_at, user_id 
    # +2 for video 

    total_completed = 0 

    self.attribute_names.each do |attr| 
    total_completed += 1 unless self[attr].blank? 
    end 

    total_completed = total_completed - 3 
    # +1 name 
    # -4 for id, created_at, updated_at, user_id 

    total_completed += 1 if self.cities.any? 
    total_completed += 1 if self.positions.any? 
    total_completed += 1 if self.industries.any? 
    total_completed += 2 if self.user.video 

    value = (100.0*total_completed/total_questions).round 

    unless self.progress_level == value 
    self.progress_level = value 
    self.save! 
    end 

    (100.0*total_completed/total_questions).round 

end 

Answer 1

添加一列與遷移當前模型。

每當您運行progress時更新該列。非常簡單，只是喜歡的方式你現在做:-)

更新

雖然我很喜歡在回調或觀察者這樣的想法，我認爲你可以得到的方式通過你現在正在做。回調和觀察者可能導致誤導。對於這個簡單的情況，我會把它留在方法中。