在.rb文件（sinatra）中無法訪問函數中的變量

Question

現在，我在我的rb文件中有此代碼。它工作得很好：

project = PivotalTracker::Project.find(123456) 

get '/' do 
    @accepted = project.stories.all(:current_state => 'accepted').length 
    @delivered = project.stories.all(:current_state => 'delivered').length 
    @finished = project.stories.all(:current_state => 'finished').length  

    erb :home 
end 

我想創造一個totalStories功能，而不是使用具有3條冗長線，冗餘代碼。

所以，我試過如下：

get '/' do 
    @accepted = totalStories('accepted') 
    @delivered = totalStories('delivered') 
    @finished = totalStories('finished') 

    def totalStories(storyState) 
    var estimate = project.stories.all(:current_state => storyState).length 
    return var 
    end 

    erb :home 
end 

有了這個代碼，我得到一個錯誤：

NoMethodError at/
undefined method `totalStories' for #<Sinatra::Application:0x007f89bae6c800> 

關於如何解決此錯誤的任何提示？謝謝！

UPDATE： 我感動的方法get塊外，但現在我得到一個新的錯誤：undefined local variable or method project'`

的project變量之外，上面的方法定義。

值得一提的是，我在其他get塊中使用了project變量。

Answer 1

使用輔助來代替：

get '/' do 
    @accepted = total_stories('accepted') 
    @delivered = total_stories('delivered') 
    @finished = total_stories('finished') 

    erb :home 
end 

helpers do 
    def total_stories(option) 
    # project = PivotalTracker::Project.find(123456) 
    project.stories.all(:current_state => option).length 
    end 
end 

添加@布林的回答，而不是上面的代碼，你可以通過具有一個對象，而不是一個幫手避免undefined method project錯誤。例如：

get '/' do 
    # same code 
end 

def total_stories(option) 
    project(12345).stories.all(:current_state => option).length 
    # The project object here causes an error since it looks for a 
    # project method (yes, instead of object) under Sinatra's Base or Application 
    # hence, we define the method inside the helpers block 
end 

helpers do 
    def project(id) 
    # Here goes the PivotalTracker find method for that particular ID. 
    end 

end 

希望有所幫助。

Answer 2

爲什麼你不在'get'函數之外創建這個函數？

def totalStories(storyState) 
    project.stories.all(:current_state => storyState).length 
end 

get '/' do 
    @accepted = totalStories('accepted') 
    @delivered = totalStories('delivered') 
    @finished = totalStories('finished') 

    erb :home 
end 

您可能還會縮短您的totalStories功能，並且只保留一條語句，因爲將返回上次計算的結果。