在一个动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 应用程序中为相同的帖子提供 2 种视图.例如 - 在一种情况下，登录用户可以更新和编辑帖子，而在另一种情况下，任何用户都可以查看并评论或选择它.

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.

我该怎么办?我需要单独的课程吗?我知道每个视图都需要一个单独的视图，但是模型和控制器呢?

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: 你的视图会有相似的内容，但只有登录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.

你应该使用局部视图，并且在你的主视图中你应该这样写:

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，部分的名称应始终以下划线开头，因此在这种情况下您的部分将被称为 _edit_form.html.erb 或 _edit_form.html.haml，取决于您使用的是什么.

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: 根据用户是否登录，你想要呈现完全不同的视图，那么你应该在你的控制器中处理它:

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

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

And your files would be named show_with_edit.html.erb and show_without_edit.html.erb

此外，如果您的登录用户视图名为 show，那么您可以这样做:

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

3.case: 如果您想根据用户是否登录而基本上更改所有内容，您可以创建一些自定义方法并在原始方法中调用它们像这样的动作:

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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