downgrade rails properly

Gemfile

@@ -13,13 +13,13 @@ if rails_master?
   gem 'rails', git: 'https://github.com/rails/rails.git'
   gem 'seed-fu', git: 'https://github.com/SamSaffron/seed-fu.git', branch: 'discourse'
 else
-  gem 'actionmailer', '~> 5.1'
-  gem 'actionpack', '~> 5.1'
-  gem 'actionview', '~> 5.1'
-  gem 'activemodel', '~> 5.1'
-  gem 'activerecord', '~> 5.1'
-  gem 'activesupport', '~> 5.1'
-  gem 'railties', '~> 5.1'
+  gem 'actionmailer', '5.1.5'
+  gem 'actionpack', '5.1.5'
+  gem 'actionview', '5.1.5'
+  gem 'activemodel', '5.1.5'
+  gem 'activerecord', '5.1.5'
+  gem 'activesupport', '5.1.5'
+  gem 'railties', '5.1.5'
   gem 'sprockets-rails'
   gem 'seed-fu'
 end

Gemfile.lock

@@ -1,39 +1,39 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actionmailer (5.2.0)
-      actionpack (= 5.2.0)
-      actionview (= 5.2.0)
-      activejob (= 5.2.0)
+    actionmailer (5.1.5)
+      actionpack (= 5.1.5)
+      actionview (= 5.1.5)
+      activejob (= 5.1.5)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (5.2.0)
-      actionview (= 5.2.0)
-      activesupport (= 5.2.0)
+    actionpack (5.1.5)
+      actionview (= 5.1.5)
+      activesupport (= 5.1.5)
       rack (~> 2.0)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.2.0)
-      activesupport (= 5.2.0)
+    actionview (5.1.5)
+      activesupport (= 5.1.5)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.3)
     active_model_serializers (0.8.4)
       activemodel (>= 3.0)
-    activejob (5.2.0)
-      activesupport (= 5.2.0)
+    activejob (5.1.5)
+      activesupport (= 5.1.5)
       globalid (>= 0.3.6)
-    activemodel (5.2.0)
-      activesupport (= 5.2.0)
-    activerecord (5.2.0)
-      activemodel (= 5.2.0)
-      activesupport (= 5.2.0)
-      arel (>= 9.0)
-    activesupport (5.2.0)
+    activemodel (5.1.5)
+      activesupport (= 5.1.5)
+    activerecord (5.1.5)
+      activemodel (= 5.1.5)
+      activesupport (= 5.1.5)
+      arel (~> 8.0)
+    activesupport (5.1.5)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
+      i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     addressable (2.5.2)
@@ -41,7 +41,7 @@ GEM
     annotate (2.7.4)
       activerecord (>= 3.2, < 6.0)
       rake (>= 10.4, < 13.0)
-    arel (9.0.0)
+    arel (8.0.0)
     ast (2.4.0)
     aws-eventstream (1.0.0)
     aws-partitions (1.91.0)
@@ -135,7 +135,7 @@ GEM
     hkdf (0.3.0)
     htmlentities (4.3.4)
     http_accept_language (2.0.5)
-    i18n (1.0.1)
+    i18n (0.9.5)
       concurrent-ruby (~> 1.0)
     image_size (1.5.0)
     in_threads (1.5.0)
@@ -272,9 +272,9 @@ GEM
     rails_multisite (2.0.4)
       activerecord (> 4.2, < 6)
       railties (> 4.2, < 6)
-    railties (5.2.0)
-      actionpack (= 5.2.0)
-      activesupport (= 5.2.0)
+    railties (5.1.5)
+      actionpack (= 5.1.5)
+      activesupport (= 5.1.5)
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
@@ -405,13 +405,13 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  actionmailer (~> 5.1)
-  actionpack (~> 5.1)
-  actionview (~> 5.1)
+  actionmailer (= 5.1.5)
+  actionpack (= 5.1.5)
+  actionview (= 5.1.5)
   active_model_serializers (~> 0.8.3)
-  activemodel (~> 5.1)
-  activerecord (~> 5.1)
-  activesupport (~> 5.1)
+  activemodel (= 5.1.5)
+  activerecord (= 5.1.5)
+  activesupport (= 5.1.5)
   annotate
   aws-sdk-s3
   barber
@@ -479,7 +479,7 @@ DEPENDENCIES
   rack-mini-profiler
   rack-protection
   rails_multisite
-  railties (~> 5.1)
+  railties (= 5.1.5)
   rake
   rb-fsevent
   rb-inotify (~> 0.9)

lib/freedom_patches/fast_pluck.rb

@@ -1,6 +1,10 @@
 # Speeds up #pluck so its about 2.2x faster, importantly makes pluck avoid creation of a slew
 # of AR objects
 #
+#
+
+# until we upgrade rails
+return
 
 require_dependency 'sql_builder'