Question

I wonder howto get from a string “nil” the nil:NilClass?

nil.inspect -> "nil"

I wish something like:

"nil".to_nil -> nil

Update:

As I write in the comment bellow it’s easier to :

params[:form].each_pair{|k,v| fields[k] = k.to_s.include?('_id') ? v.to_nil : v

then

params[:form].each_pair{|k,v| fields[k] = k.to_s.include?('_id') ? (v == "nil" ? nil : v) : v }

Answer 1

Re-open the string class if you want this functionality globally.

class String
  def to_nil
    if self == 'nil'
      nil
    else
      self
    end
  end
end

'nil'.to_nil # => nil
'another string'.to_nil # => "another string"