Rails hidden field undefined method 'merge' error
Ruby on-RailsRubyRuby on-Rails-3FormsHidden FieldRuby on-Rails Problem Overview
I wanna do something like this in rails
Here is what I have so far in rails:
<%= form_for @order do |f| %>
<%= f.hidden_field :service, "test" %>
<%= f.submit %>
<% end %>
But then I get this error:
undefined method `merge' for "test":String
How can I pass values in my hidden_field in rails?
Ruby on-Rails Solutions
Solution 1 - Ruby on-Rails
You should do:
<%= f.hidden_field :service, :value => "test" %>
hidden_field expects a hash as a second argument
Solution 2 - Ruby on-Rails
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:
controller:
def new
...
@order.service = "test"
...
end</pre>
view:
<%= form_for @order do |f| %>
<%= f.hidden_field :service %>
<%= f.submit %>
<% end %>
Solution 3 - Ruby on-Rails
It works fine in Ruby 1.9 & rails 4
<%= f.hidden_field :service, value: "test" %>
Solution 4 - Ruby on-Rails
A version with the new syntax for hashes in ruby 1.9:
<%= f.hidden_field :service, value: "test" %>
Solution 5 - Ruby on-Rails
This also works in Rails 3.2.12:
<%= f.hidden_field :service, :value => "test" %>
Solution 6 - Ruby on-Rails
By the way, I don't use hidden fields to send data from server to browser. Data attributes are awesome. You can do
<%= form_for @order, 'data-service' => 'test' do |f| %>
And then get attribute value with jquery
$('form').data('service')