我正在app/assets/javascripts/ticket.js.coffee为特定视图运行 jQuery。每次我访问该页面时，浏览器都会呈现此错误 - 在线任何地方都没有提及此错误。
（本地主机：3000/Tickets/new）：
SyntaxError: unexpected POST_IF
Extracted source (around line #6):
3: <head>
4: <title>Ops2</title>
5: <%= stylesheet_link_tag "application", :media => "all" %>
6: <%= javascript_include_tag "application" %>
7: <%= csrf_meta_tags %>
8: </head>
9: <body>
抛出错误的页面文件 -
app/views/tickets/_form.html.erb：
<%= form_for(@ticket) do |f| %>
<% if @ticket.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@ticket.errors.count, "error") %> prohibited this ticket from being saved:</h2>
<ul>
<% @ticket.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :school_id %><br />
<%= f.collection_select :school_id, School.order(:name), :id, :name, include_blank: true%>
</div>
<div class="field">
<%= f.label :location_id %><br />
<%= f.grouped_collection_select :location_id, School.order(:name), :locations, :name, :id, :name, include_blank: true%>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
app/assets/javascripts/application.js包含：
//= require jquery
//= require jquery_ujs
//= require_tree .
带有 jQuery 的 Coffeescript 文件 -
应用程序/资产/javascripts/tickets.js.coffee：
$ ->
$('#ticket_location_id').parent().hide()
locations = $('#ticket_location_id').html()
$('#ticket_school_id').change ->
school = $('#ticket_school_id :selected').text()
options = $(locations).filter("optgroup[label='#{school}']").html()
if options
$('#ticket_location_id').html(options)
$('#ticket_location_id').parent().show()
else
$('#ticket_location_id').empty
$('#ticket_location_id').parent().hide()
POST_IF 错误已通过缩进if / else我的咖啡脚本中的语句得到解决！（有关详细信息，请参阅下面的答案）没有错误并且页面加载！