ruby 中调用自身的别名方法链

发布于 09-04 11:43 字数 1161 浏览 8 评论 0原文

我正在重写控制器渲染方法,但是,我想在 render_to_string 方法中使用旧方法。这些是我当前的代码:

def render_with_xhr(options = {}, extra_options = {}, xhr_check = true, &block)
  if xhr_check && request.xhr?
    template = render_to_string(options)
    render_without_xhr(:update) {|page| page.replace_html("#popup .dialog", template)}
  else
    render_without_xhr(options, extra_options, &block)
  end
end

alias_method_chain :render, :xhr

发生的情况是,由于 render_to_string 使用了 render(大概),我最终陷入了无限循环。我怎样才能让它回退到旧的方法只是为了那一行我的新渲染方法?

我根据接受的答案调整了代码,最终代码如下:

def render_to_string(options = {}, &block)
  render(options, {}, false, &block)
ensure
  response.content_type = nil
  erase_render_results
  reset_variables_added_to_assigns
end

def render_with_xhr(options = nil, extra_options = {}, xhr_check = true, &block)
  if xhr_check && request.xhr?
    template = render_to_string(options)
    render_without_xhr :update do |page|
      page.replace_html("#popup .dialog", template)
    end
  else
    render_without_xhr(options, extra_options, &block)
  end
end

alias_method_chain :render, :xhr

I am rewriting the controller render method, however, I want to use the old method when in the render_to_string method. These are my current codes:

def render_with_xhr(options = {}, extra_options = {}, xhr_check = true, &block)
  if xhr_check && request.xhr?
    template = render_to_string(options)
    render_without_xhr(:update) {|page| page.replace_html("#popup .dialog", template)}
  else
    render_without_xhr(options, extra_options, &block)
  end
end

alias_method_chain :render, :xhr

What happens is that since render_to_string makes use of render (presumably), I end up in an infinite loop. How can I make it fall back to the old method just for that line my new render method?

I tweaked the codes from the accepted answer, final code is below:

def render_to_string(options = {}, &block)
  render(options, {}, false, &block)
ensure
  response.content_type = nil
  erase_render_results
  reset_variables_added_to_assigns
end

def render_with_xhr(options = nil, extra_options = {}, xhr_check = true, &block)
  if xhr_check && request.xhr?
    template = render_to_string(options)
    render_without_xhr :update do |page|
      page.replace_html("#popup .dialog", template)
    end
  else
    render_without_xhr(options, extra_options, &block)
  end
end

alias_method_chain :render, :xhr

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评论(1

℉絮湮2024-09-11 11:43:01

您可以在第 2 行将一些唯一值传递给选项哈希,然后在代码中检测它并

def render_with_xhr(options = {}, extra_options = {}, xhr_check = true, &block)
  if xhr_check && request.xhr? && !options.delete(:bacon)
    template = render_to_string(options.merge(:bacon => true))
    render_without_xhr(:update) {|page| page.replace_html("#popup .dialog", template)}
  else
    render_without_xhr(options, extra_options, &block)
  end
end

alias_method_chain :render, :xhr

像这样删除:)

you could at line 2 pass some unique value to options hash, and then detect it in your code and remove

def render_with_xhr(options = {}, extra_options = {}, xhr_check = true, &block)
  if xhr_check && request.xhr? && !options.delete(:bacon)
    template = render_to_string(options.merge(:bacon => true))
    render_without_xhr(:update) {|page| page.replace_html("#popup .dialog", template)}
  else
    render_without_xhr(options, extra_options, &block)
  end
end

alias_method_chain :render, :xhr

like that :)

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