定製to_json不會被調用Rails中

Question

型號

def to_json 
    p 'ppp' 
    p UNDISPLAYABLE_SIGNS 
    if sign.in? UNDISPLAYABLE_SIGNS 
    {code: code} 
    else 
    super 
    end 
end 

控制器

render json: {currency: @currency, savedInUser: true} 

PPP沒有在服務器控制檯打印出來，我怎麼能定製我的JSON響應，我在做什麼錯？

Answer 1

是as_json不to_json

def as_json 
    p 'ppp' 
    p UNDISPLAYABLE_SIGNS 
    if sign.in? UNDISPLAYABLE_SIGNS 
    {code: code} 
    else 
    super 
    end 
end