Rails radio button options hash - ruby-on-rails

Question

My view:
<%= radio_button_tag "recommendation_ratings[#{rec.recommendation.id}][rating]", '3'%>
In my controller, I parse out these values:
input = params[:recommendation_ratings].values
input.each do |mini_params|
rating = mini_params[:rating]
recommendation_id = mini_params[:recommendation_id]
Using the rating variable I create a new records in the same controller action:
rate = Rating.new(
:rating => rating,
:label => rating_label)
How can I assign a rating to a rating_label when a new record is created. Example:
if rating == 1 rating_label = "Fair"
Should I do this in my controller, or can I add the rating_label to my radio_button_tag as another attribute?
UPDATE:
I tried a case statement in my controller but get an NoMethodError "Undefined Method Rating"
rating case
when rating == 1
rating_label = "Bad"
when rating == 2
rating_label = "Fair"
when rating == 3
rating_label = "Good"
else rating == 0
rating_label = "N/A"
end

Answer 1

Refactor your view code from using radio_button_tag to a fields_for block:
<%= fields_for :recommendation_ratings do |f| %>
<% f.hidden_field :id, rec.recommendation.id %>
<% f.radio_button :rating, 3 %>
<% end %>
Change your controller code to this:
selected_rating = params[:recommendation_ratings]
rating = selected_rating[:rating]
recommendation_id = selected_rating[:id]
And add a helper method somewhere as:
def rating_label(rating)
%w{N/A Bad Fair Good}[rating.to_i]
end
Now you can make a new Rating object like this:
rate = Rating.new(
:rating => rating,
:label => rating_label(rating))