Store property list in admin

app/controllers/spree/admin/taxons_controller_decorator.rb

@@ -0,0 +1,15 @@
+Spree::Admin::TaxonsController.class_eval do
+  before_filter :split_taxon_ids, only: [:new, :update]
+
+  private
+    # todo: rework this. Don't permit all params
+    def taxon_params
+      params.require(:taxon).permit!
+    end 
+
+    def split_taxon_ids
+     if params[:taxon][:property_ids].present?
+       params[:taxon][:property_ids] = params[:taxon][:property_ids].split(',')
+     end
+    end
+end

app/views/spree/admin/taxons/_taxons_filters.html.erb

@@ -1,6 +1,6 @@
 <div class="twelve columns alpha omega">
-  <%= @taxon.taxon_filter_ids %>
-  <%= f.field_container :taxon_filters do %>
-    <%= f.text_field :taxon_filter_ids, value: @taxon.taxon_filter_ids.join(',') %>
+  <%= f.field_container :properties do %>
+    <%= f.label :properties, Spree.t(:filterable_properties) %><br />
+    <%= f.text_field :property_ids, value: @taxon.property_ids.join(',') %>
   <% end %>
 </div>

config/initializers/hstore_filter.rb

@@ -0,0 +1 @@
+Spree::PermittedAttributes.taxon_attributes << :property_ids

spec/models/spree/taxon_decorator_spec.rb

@@ -3,11 +3,13 @@
 describe Spree::Taxon do
   let(:taxon) { FactoryGirl.create :taxon }
   let(:property) { FactoryGirl.create :property }
+  let(:property2) { FactoryGirl.create :property }
+
 
   describe 'no taxon filters are defined' do
     it 'creates taxon filters' do
-      taxon.property_ids = [property.id,]
-      expect(taxon.properties).to eq([property])
+      taxon.property_ids = [property.id, property2.id]
+      expect(taxon.properties).to eq([property, property2])
     end
   end