Question

这是我正在尝试做的一些模型代码：

class ApplicationController < ActionController::Base
  layout "application"
end

class SomeController < ActionController::Base

  verify :method => :get, :only => [:index]
  def index
    @some_objects = Some.collect
  end

end

# Now in: views/some/index.html.erb

<% if @some_objects %>
  # use the application layout
  <%= render(:partial => 'some/objects', :locals => {:some_objects => @some_objects}) %>
<% else %>
  # use a different layout than application
  # some/sales_page --> views/some/_sales_page.html.erb
  # layouts/sales --> views/layouts/sales.html.erb
  <%= render('some/sales_page', :layout => 'layouts/sales') %>
<% end %>

正如您所看到的，我正在尝试为部分some / sales_page呈现与应用程序不同的布局。我该怎么办？

注意：我的Rails版本是2.3.11。

Answer 1

这非常简单，render方法采用:layout选项（基本上就是你的示例），但是你的布局可以和调用文件存在于同一个目录中并使用它部分命名约定（即以下划线开头）。因此，对于您的示例，如果将是以下几行：

#In: views/some/index.html.erb

<% if @some_objects %>
  # use the application layout
  <%= render(:partial => 'objects', :locals => {:some_objects => @some_objects}) %>
<% else %>
  <%= render(:partial => 'sales_page', :layout => 'sales_layout') %>
<% end %>

views/some文件夹的内容如下：

views/some/index.html.erb
views/some/_objects.html.erb
views/some/_sales_page.html.erb
views/some/_sales_layout.html.erb

有关该主题的更多信息，请查看this，this和this。

Answer 2

您只能在控制器层中更改布局。

class SomeController < ActionController::Base
  layout :choose_layout
  verify :method => :get, :only => [:index]
  def index
    @some_objects = Some.collect
  end

  private
  def choose_layout
    @some_objects = Some.collect
    @some_objects ? "application" : "different_layout"
  end
end

Rails - 呈现部分布局

2 个答案: