Rails 3-在另一个帖子的SHOW视图中无法创建新帖子 [英] Rails 3 - Unable to create a new post while at the SHOW view of another Post

问题描述

我有一个名为 Post的模型。我想在另一个帖子的SHOW视图中使用模式表格来创建新帖子。意思是，当我在其显示视图中查看名为 John的帖子时，我希望能够从那里创建一个新帖子。

I have a model named "Post". I want to use a modal form to create a new post while at the SHOW view of another post. Meaning while I am viewing the post named "John" in its show view, I would like to be able to create a new post from right there.

我遇到的问题是新帖子的ID与我正在查看的帖子相同，并导致触发更新操作而不是创建操作。有关如何处理此问题的任何建议？

The problem I have is that the ID of the new post remains the same as the post I am viewing, and causes the update action to be fired instead of the create action. Any suggestions on how to handle this?

推荐答案

使用 Post.new 并在 form_for 中使用：

<%= form_for Post.new %>
  <%= render "form" %>
<% end %>

当然，这意味着您需要删除 form_for 从表单中分离出来（如果您有的话），但这是一个小小的牺牲。

Of course this means you'll need to remove the form_for from your form partial if you have it in there, but that's a small sacrifice to make.

但是，如果您真的不想这样做您将必须通过局部变量将其传递给part部分，以指示要显示的帖子。在显示页面上，您将拥有以下内容：

However if you really don't want to do that then you will have to pass through a local variable to the form partial to indicate which post you want to display. On the show page you'd have this:

<%= render :partial => "form", :locals => { :post => Post.new } %>

在新和编辑视图，您可以执行以下操作：

In the new and edit views you'd do this:

<%= render :partial => "form", :locals => { :post => @post } %>

该行稍长一些，但这可以让您保留 form_for 标记在表单部分内，而不阻塞其他三个视图。

The line is a little bit longer, but that would allow you to keep the form_for tag inside the form partial and not clog up the three other views with it.

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