Question

我有这样的动作来添加一个ContestEntry记录来展示。

@entry = ContestEntry.find(params[:content_id])
if @entry.view_in_showcase == true
  @entry.view_in_showcase = false
  @entry.save
  redirect_to :back, :notice => "Drop design to showcase"
else
  @entry.view_in_showcase = true
  @entry.save
  redirect_to :back, :notice => "Add design to showcase"
end

但是现在我必须为多个记录实现它，并且我有包含ContestEntry记录的数组。如何将这个数组与这些代码一起使用？

例如：

arr_showcase = [ContestEntry.first,ContestEntry.last,..]

如何以与文本相同的目的更新此数组。

Answer 1

假设您的数组是@entries：

@entries.each {|e| e.update_attribute('view_in_showcase', false) if e.view_in_showcase }

Answer 2

重用此代码的第一步是在方法中重构它。

class ContestEntry
  def toggle_view_on_showcase!
    view_on_showcase.toggle!
    save
    view_on_showcase
  end
end

# Refactor controller
if @entry.toggle_view_on_showcase!
  redirect_to :back, :notice => "Add design to showcase"
else
  redirect_to :back, :notice => "Drop design to showcase"
end

# reuse!
arr_showcase.each { |e| e.toggle_view_on_showcase! }

在rails中使用每个代码块

2 个答案: