Allow chaining on Harvest predictions method returns

app/models/concerns/predict_harvest.rb

@@ -72,7 +72,7 @@ module PredictHarvest
           .where.not(planting_id: nil)
       end
 
-      []
+      Harvest.none
     end
 
     private

app/models/planting.rb

@@ -104,7 +104,7 @@ class Planting < ApplicationRecord
   end
 
   def nearby_same_crop
-    return if location.empty?
+    return Planting.none if location.blank?
 
     # latitude, longitude = Geocoder.coordinates(location, params: { limit: 1 })
     Planting.joins(:garden)