在一个操作中呈现不同的视图 [英] Rendering different views in one action

问题描述

我想在我的rails应用程序中有相同的帖子的2种视图。例如，在登录的用户可以更新和编辑帖子，在其他任何用户可以只查看它和评论或选择它。

I want to have 2 kinds of views for the same posts in my rails application. For instance - in one where a logged in user can update and edit the post, and in the other any user can just view it and comment on it or select it.

我应该怎么做呢？我需要一个单独的类吗？我知道我需要一个单独的视图为每个，但如何模型和控制器。

How should I go about this? Do I need a separate class? I know I need a separate view for each, but how about the model and the controller?

推荐答案

1.case： ，您的视图将具有类似的内容，但只有已登录的用户将有额外的选项，如编辑。

1.case: your views are going to have similar content, but only the signed in users will have extra options like editing.

您应该使用部分检视，在主要检视中您应该这样写：

You should use a partial view and in your main view you should write something like this:

<% if signed_in? %>
    <%= render 'edit_form' %>
<% end %>

请记住，partial的名称应始终以下划线开头，根据您使用的内容，调用 _edit_form.html.erb 或 _edit_form.html.haml 。

Remember, the name of the partial should always start with a underscore, so your partial in this case would be called _edit_form.html.erb or _edit_form.html.haml, depending on what you are using.

2.case： （具体取决于用户是否已登录），您想要呈现完全不同的视图您应该在您的控制器中处理它：

2.case: depending on if the user is signed in or not, you want to render completely different views, then you should handle it in your controller:

def show
  if signed_in?
    render 'show_with_edit'
  else
    render 'show_without_edit`
  end
end

您的文件将命名为 show_with_edit.html.erb 和 show_without_edit.html.erb

此外，如果您对登录用户的查看为 show ，那么您可以：

Also, if your view for a signed in user was called show then you could just do this:

def show
  render 'show_without_edit' unless signed_in?
end

strong>如果您想根据用户是否已登录而更改基本上一切，您可以创建一些自定义方法，并在原始操作中调用，如下所示：

3.case: if you want to change basically EVERYTHING depending if the user is signed in or not, you could create some custom methods and call them inside your original action like this:

def show 
  if singed_in? 
    show_signed_in
  else
    show_not_signed_in
  end
end

private

def show_signed_in
   # declaring some instance variables to use in the view..
   render 'some_view'
end

def show_not_signed_in
   # declaring some other instance variables to use in the view..
   render 'some_other_view'
end

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