[rails] Fix after Postgres upgrade, attempt #4 (#658)

* [react, rails] rollback some unnecessary changes in autofix-generate PR #655

* [rails] Revert all previous attemtpts

* [rails] fix reviews serialization after Postgres upgrade

ruby-on-rails/Gemfile

@@ -18,8 +18,6 @@ gem 'nokogiri', '~>1.17.2'
 # Use Rack CORS for handling Cross-Origin Resource Sharing (CORS), making cross-origin AJAX possible
 gem 'rack-cors'
 gem 'pg'
-# Add serializer for proper JSON handling
-gem 'active_model_serializers', '~> 0.10.13'
 
 gem "stackprof"
 gem "sentry-ruby"

ruby-on-rails/app/controllers/api/v1/products_controller.rb

@@ -12,12 +12,14 @@ def index
     span_products_db.finish
 
     # n+1 to db if done this way
-    products.each do |prod_slow|
+    products = products.map do |prod|
       span_products_slow_db = transaction.start_child(op: "custom.reviews_slow_db_call")
-      prod_slow["pg_sleep"] = ""
-      prod_slow["reviews"] = []
-      prod_slow["reviews"] = Reviews.select("id, productid, rating, customerid, description, created, Null as pg_sleep").where("productid="+prod_slow.id.to_s)
+      prod_attrs = prod.attributes
+      prod_attrs["pg_sleep"] = ""
+      prod_attrs["reviews"] = []
+      prod_attrs["reviews"] = Reviews.select("id, productid, rating, customerid, description, created, Null as pg_sleep").where("productid="+prod.id.to_s).as_json
       span_products_slow_db.finish
+      prod_attrs
     end
 
     # fewer db calls this way -- done in products-join
@@ -40,7 +42,7 @@ def index
     # end
     # span_response.finish
 
-    render json: products, each_serializer: ProductSerializer, status: 200
+    render json: products, status: 200
   end
 
   # sent here if unexpected route was enterered