Fixed ordering of Harvests - don't order in scope.

app/controllers/harvests_controller.rb

@@ -34,6 +34,7 @@ class HarvestsController < ApplicationController
 
   def create
     @harvest.crop_id = @harvest.planting.crop_id if @harvest.planting_id
+    @harvest.harvested_at = Time.zone.now if @harvest.harvested_at.blank?
     @harvest.save
     respond_with(@harvest)
   end
@@ -72,8 +73,8 @@ class HarvestsController < ApplicationController
     elsif @planting
       @planting.harvests
     else
-      Harvest
-    end.joins(:owner, :crop).paginate(page: params[:page])
+      Harvest.all
+    end.order(harvested_at: :desc).joins(:owner, :crop).paginate(page: params[:page])
   end
 
   def csv_filename

spec/controllers/harvests_controller_spec.rb

@@ -19,7 +19,8 @@ describe HarvestsController do
     {
       owner_id: subject.current_member.id,
       crop_id: FactoryBot.create(:crop).id,
-      plant_part_id: FactoryBot.create(:plant_part).id
+      plant_part_id: FactoryBot.create(:plant_part).id,
+      harvested_at: '2017-01-01'
     }
   end