Fetch Property instead of ProducerProps from query

By not having to treat producer properties differently we can filter and
fetch all properties from DB without having to process it with Ruby and
with a single query.

spec/serializers/api/cached_enterprise_serializer_spec.rb

@@ -33,10 +33,10 @@ describe Api::CachedEnterpriseSerializer do
 
     let(:property) { create(:property, presentation: 'One') }
     let(:duplicate_property) { create(:property, presentation: 'One') }
+    let(:producer) { create(:supplier_enterprise, properties: [duplicate_property]) }
 
     before do
       product = create(:product, properties: [property])
-      producer = create(:supplier_enterprise, properties: [duplicate_property])
       producer.supplied_products << product
 
       create(
@@ -57,6 +57,14 @@ describe Api::CachedEnterpriseSerializer do
         properties = cached_enterprise_serializer.distributed_properties
         expect(properties).to eq([property])
       end
+
+      it 'fetches producer properties' do
+        distributed_producer_properties = cached_enterprise_serializer
+          .distributed_producer_properties
+
+        expect(distributed_producer_properties)
+          .to eq(producer.producer_properties.map(&:property))
+      end
     end
 
     context 'when the enterprise is an active distributor' do
@@ -68,6 +76,14 @@ describe Api::CachedEnterpriseSerializer do
         properties = cached_enterprise_serializer.distributed_properties
         expect(properties).to eq([property])
       end
+
+      it 'fetches producer properties' do
+        distributed_producer_properties = cached_enterprise_serializer
+          .distributed_producer_properties
+
+        expect(distributed_producer_properties)
+          .to eq(producer.producer_properties.map(&:property))
+      end
     end
   end
 end