Don't run full guide reindex on garden save.

Reindex each guide individually in order of popularity.

app/jobs/reindex_guides_job.rb

@@ -2,6 +2,8 @@ class ReindexGuidesJob < ActiveJob::Base
   queue_as :default
 
   def perform
-    Guide.reindex
+    Guide.desc(:popularity_score).each do |guide|
+      guide.reindex_async
+    end
   end
 end

spec/jobs/reindex_guides_job_spec.rb

@@ -2,7 +2,9 @@
 
 describe ReindexGuidesJob do
   it 'reindexes guides' do
-    expect(Guide).to receive(:reindex)
+    FactoryGirl.create(:guide)
+
+    expect_any_instance_of(Guide).to receive(:reindex_async)
 
     ReindexGuidesJob.new.perform
   end

spec/models/garden_crop_spec.rb

@@ -14,7 +14,9 @@
   end
 
   it 'reindexes guides' do
-    expect(Guide).to receive(:reindex)
+    FactoryGirl.create(:guide)
+
+    expect_any_instance_of(Guide).to receive(:reindex_async)
 
     FactoryGirl.create(:garden, user: FactoryGirl.create(:user))
   end