修正 Warning

Author: huacnlee

Gemfile

@@ -142,12 +142,9 @@ group :development, :test do
 
   gem 'puma', '~> 2.14.0'
 
-  gem 'byebug'
   # Better Errors
   gem 'better_errors'
   gem 'binding_of_caller'
 
-  gem 'tunemygc'
-
   gem 'bundler-audit', require: false
 end

Gemfile.lock

@@ -59,8 +59,6 @@ GEM
       sass-rails
     arel (6.0.3)
     ast (2.2.0)
-    astrolabe (1.3.1)
-      parser (~> 2.2)
     auto-space (0.0.4)
       activesupport (> 3.0.0)
     axiom-types (0.1.1)
@@ -82,7 +80,6 @@ GEM
     bundler-audit (0.4.0)
       bundler (~> 1.2)
       thor (~> 0.18)
-    byebug (8.2.1)
     cancancan (1.8.4)
     capistrano (2.9.0)
       highline
@@ -273,8 +270,8 @@ GEM
       omniauth (~> 1.2)
     orm_adapter (0.5.0)
     parallel (1.6.1)
-    parser (2.2.3.0)
-      ast (>= 1.1, < 3.0)
+    parser (2.3.0.1)
+      ast (~> 2.2)
     pg (0.18.4)
     phantomjs (1.9.8.0)
     posix-spawn (0.3.11)
@@ -361,13 +358,11 @@ GEM
       rspec-mocks (~> 3.4.0)
       rspec-support (~> 3.4.0)
     rspec-support (3.4.1)
-    rubocop (0.35.1)
-      astrolabe (~> 1.3)
-      parser (>= 2.2.3.0, < 3.0)
+    rubocop (0.36.0)
+      parser (>= 2.3.0.0, < 3.0)
       powerpack (~> 0.1)
       rainbow (>= 1.99.1, < 3.0)
       ruby-progressbar (~> 1.7)
-      tins (<= 1.6.0)
     ruby-prof (0.15.9)
     ruby-progressbar (1.7.5)
     rucaptcha (0.3.2)
@@ -405,8 +400,6 @@ GEM
     thor (0.19.1)
     thread_safe (0.3.5)
     tilt (2.0.1)
-    tins (1.6.0)
-    tunemygc (1.0.62)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
     uglifier (2.7.2)
@@ -439,7 +432,6 @@ DEPENDENCIES
   better_errors
   binding_of_caller
   bundler-audit
-  byebug
   cancancan (~> 1.8.4)
   capistrano (= 2.9.0)
   capistrano-sidekiq
@@ -510,7 +502,6 @@ DEPENDENCIES
   sinatra
   social-share-button (= 0.1.5)
   sprockets
-  tunemygc
   turbolinks!
   uglifier
   unicorn (= 5.0.0)

spec/models/concerns/mentionable_spec.rb

@@ -4,7 +4,7 @@
   t.integer :user_id
   t.integer :mentioned_user_ids, array: true, default: []
   t.text :body
-  t.timestamps
+  t.timestamps null: false
 end
 
 class TestDocument < ActiveRecord::Base