未定义的方法和attr_accessor

Question

I want to collect data from an input which is not in my model. So, I tried to use a "attr_accessor" but it's don't work and I don't know why ... There is the line in my controller :

attr_accessor :nbr_blocs

And there are few parts from my form (made with simpleform) :

<%= simple_form_for @newsletter, method: "post", url: (gestion_newsletters_assist_step2_send_path) do |f| %>
[...]
<%= f.input :"nbr_blocs", :as => :integer, :input_html => { :maxlength => 2 } %>
[...]
<% end %>

And my error is : " undefined method `nbr_blocs' "

What can I do ? Thank you for your help.

Answer 1

From SimpleForm docs :

#input(attribute_name, options = {}, &block) ⇒ Object

So, :nbr_blocs must be a attribute from @newsletter , not a Controller accessor. I guess you can use simple_fields_for for an input that is not in your model, nut I am not sure:

<%= simple_form_for @newsletter do |f| %>
  <%= f.input :attribute %>

  <%= simple_fields_for :not_model do |n| %>
    <%= n.input :nbr_blocs %>
  <% end %>
<% end %>