Rails Simpleform with non-model inputs

ruby-on-rails ruby forms simple-form
lucas clemente picture lucas clemente · Jul 5, 2012 · Viewed 11.2k times · Source

I have a normal form using simpleform. Now I'd like to add an input that does not have any corresponding field in the model, it will be processed by the controller. I tried

<%= simple_form_for @obj do |f| %>
  <%= f.input :name %>
  <%= f.input :attr, as: :string %>   <-- should just send "attr" as post data
<% end %>

but this gives a Method not found: attr_not_in_obj error. I could obviously use the standard rails helpers, but then I will miss all of the simpleform HTML around the input, and copying doesn't quite seem right.

In short: I'm looking for something like simpleform version of rails tag helpers, without any connection to a model. How do I add inputs that do not correspond to model attributes?

Answer

jdoe picture jdoe · Jul 5, 2012

Why don't you add:

attr_accessor :attr

to your model's class definition? This way your code:

<%= f.input :attr %>

should work.

OR

If this solution isn't suitable, you can always pass some value to your input method directly:

<%= f.input :attr, input_html: {value: 'something'}  %>

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