当我加载 Rails 服务器时,我的主页正常。但是,在我输入第 5.1 节中的代码以使用以下代码更新“app/views/layouts/application.html.erb”后:
<!DOCTYPE html>
<html>
<head>
<title><%= full_title(yield(:title)) %></title>
<%= stylesheet_link_tag "application", media: "all" %>
<%= javascript_include_tag "application" %>
<%= csrf_meta_tags %>
<!--[if lt IE 9]>
<script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
</head>
<body>
<header class="navbar navbar-fixed-top navbar-inverse">
<div class="navbar-inner">
<div class="container">
<%= link_to "sample app", '#', id: "logo" %>
<nav>
<ul class="nav pull-right">
<li><%= link_to "Home", '#' %></li>
<li><%= link_to "Help", '#' %></li>
<li><%= link_to "Sign in", '#' %></li>
</ul>
</nav>
</div>
</div>
</header>
<div class="container">
<%= yield %>
</div>
</body>
</html>
我得到错误:
NoMethodError in Static_pages#home
undefined method `full_title' for #<#<Class:0x38ac7e0>:0x472fce0>
这是提取的源代码(在第 4 行附近):
1: <!DOCTYPE html>
2: <html>
3: <head>
4: <title><%= full_title(yield(:title)) %></title>
5: <%= stylesheet_link_tag "application", media: "all" %>
6: <%= javascript_include_tag "application" %>
7: <%= csrf_meta_tags %>
谁能解释为什么它不起作用?