Ruby-on-rails Rails隐藏字段未定义方法“合并”错误
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/6636875/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Rails hidden field undefined method 'merge' error
提问by Jake
I wanna do something like this in rails
我想在 Rails 中做这样的事情
Here is what I have so far in rails:
这是我迄今为止在 Rails 中的内容：
<%= form_for @order do |f| %>
<%= f.hidden_field :service, "test" %>
<%= f.submit %>
<% end %>
But then I get this error:
但是后来我收到了这个错误：
undefined method `merge' for "test":String
How can I pass values in my hidden_field in rails?
如何在 rails 中的 hidden_field 中传递值？
回答by apneadiving
You should do:
你应该做：
<%= f.hidden_field :service, :value => "test" %>
hidden_fieldexpects a hash as a second argument
hidden_field期望散列作为第二个参数
回答by user132447
You are using a hidden_field instead of a hidden_field_tag. Because you are using the non-_tag version, it is assumed that your controller has already set the value for that attribute on the object that backs the form. For example:
您使用的是 hidden_field 而不是 hidden_field_tag。因为您使用的是非 _tag 版本，所以假设您的控制器已经在支持表单的对象上设置了该属性的值。例如：
controller:
控制器：
def new
...
@order.service = "test"
...
end</pre>
view:
看法：
<%= form_for @order do |f| %>
<%= f.hidden_field :service %>
<%= f.submit %>
<% end %>
回答by Tushar.PUCSD
It works fine in Ruby 1.9 & rails 4
它在 Ruby 1.9 和 rails 4 中运行良好
<%= f.hidden_field :service, value: "test" %>
回答by Michael Durrant
A version with the new syntax for hashes in ruby 1.9:
在 ruby 1.9 中具有新的哈希语法的版本：
<%= f.hidden_field :service, value: "test" %>
回答by bradmalloy
This also works in Rails 3.2.12:
这也适用于 Rails 3.2.12：
<%= f.hidden_field :service, :value => "test" %>
<%= f.hidden_field :service, :value => "test" %>
回答by Alex Teut
By the way, I don't use hidden fields to send data from server to browser. Data attributesare awesome. You can do
顺便说一下，我不使用隐藏字段将数据从服务器发送到浏览器。数据属性很棒。你可以做
<%= form_for @order, 'data-service' => 'test' do |f| %>
And then get attribute value with jquery
然后用jquery获取属性值
$('form').data('service')
