问题描述
我正在做 Rails 入门教程，当我从shell 我明白了:
I'm doing the Getting started with Rails tutorial and when I run the local server from shell I get this:
`NoMethodError in Posts#new` `/_form.html.erb where line #1 raised:
`undefined method `model_name' for NilClass:Class
这是提取的源代码(围绕第 1 行):
That is the extracted source (around line #1):
1: <%= form_for @post do |f| %>
2: <% if @post.errors.any? %>
3: <div id="errorExplanation">
4: <h2><%= pluralize(@post.errors.count, "error") %> prohibited
我刚刚开始使用 Ruby on Rails，我无法弄清楚发生了什么.我做错了什么?
I just started on Ruby on Rails and I can't figure out what is happening. What am I doing wrong?
推荐答案
您看到的错误消息意味着您有一些包含 nil 对象而不是您期望的实际对象的变量.
The error message, you are seeing means that you have some variable that contains a nil object instead of the actual object you expect.
虽然错误消息没有明确引用此内容，但您的 @post 变量可能为零.
While the error message doesn't explicitly reference this, it is likely your @post variable is nil.
为什么是零?鉴于这里的代码，这几乎是不可能的.请同时发布您的 PostsController#new 操作.
Why is it nil? That's near impossible to say given the code here. Please post your PostsController#new action as well.
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