Question

I have an instance variable called

@filtered_ratings = params[:ratings].keys 

However, if params[:ratings] is nil and #keys is called on it there is an error that is raised. If @filtered_ratings is nil, I want @filtered_ratings to be set to an empty array (or hash). Is there an easy way of doing this without too much code? Thanks!

Answer 1

@filtered_ratings = params[:ratings].keys if params[:ratings].respond_to? :keys

Edit:

 # if params[:ratings] is nil then return []
 @filtered_ratings = params[:ratings].try(:keys) || []