Merge pull request #115 from ayaman/master

Fix 'permit' params to allow multiple form inputs for a single scope

lib/filterrific/param_set.rb

@@ -29,7 +29,17 @@ def initialize(a_model_class, filterrific_params = {})
       # will be already initialized with the defaults.
       filterrific_params = model_class.filterrific_default_filter_params  if filterrific_params.blank?
       if defined?(ActionController::Parameters) && filterrific_params.is_a?(ActionController::Parameters)
-        filterrific_params = filterrific_params.permit(model_class.filterrific_available_filters).to_h.stringify_keys
+        permissible_filter_params = []
+        model_class.filterrific_available_filters.each do |p|
+          if filterrific_params[p].is_a?(ActionController::Parameters)
+            permissible_filter_params << { p => filterrific_params[p].keys }
+          elsif filterrific_params[p].is_a?(Array)
+            permissible_filter_params << { p => [] }
+          else
+            permissible_filter_params << p
+          end
+        end
+        filterrific_params = filterrific_params.permit(permissible_filter_params).to_h.stringify_keys
       else
         filterrific_params.stringify_keys!
       end