Get filters by name

[tfausak]

Currently, it's annoying to get filters by name:

class Interaction < ActiveInteraction::Base
  boolean :who_cares, :the_one_i_want
end
filter = Interaction.filters.find do |f| 
  f.name == :the_one_i_want 
end

I think it would be better if you could treat .filters as a hash:

filter = Interaction.filters[:the_one_i_want]

[AaronLasseigne]

Makes sense to me.

[tfausak]

As a result of this, I think we should remove the Filters class and replace it with a hash that maps names (as symbols) to Filters. For instance:

{
  :who_cares => #<ActiveInteraction::BooleanFilter 0x...>,
  ...
}

[AaronLasseigne]

Agreed.

[tfausak]

#108 might prevent us from replacing the Filters object with a hash.