開発環境も含めて、spring をオフにした

Gemfile

@@ -36,9 +36,12 @@ group :development do
   # Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
   gem 'web-console'
   gem 'listen', '~> 3.0.5'
+
+  # Spring が原因でクラスのロードや、環境変数のロードに失敗することがあったため、オフにした
+  # クラスが増えて、開発に支障が出るくらいロード時間が長くなったら元に戻す
   # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
-  gem 'spring'
-  gem 'spring-watcher-listen', '~> 2.0.0'
+  # gem 'spring'
+  # gem 'spring-watcher-listen', '~> 2.0.0'
 end
 
 # Group for deployment server in production environment

Gemfile.lock

@@ -174,10 +174,6 @@ GEM
       tilt (>= 1.1, < 3)
     sitemap_generator (5.1.0)
       builder
-    spring (1.7.2)
-    spring-watcher-listen (2.0.0)
-      listen (>= 2.7, < 4.0)
-      spring (~> 1.2)
     sprockets (3.7.0)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
@@ -232,8 +228,6 @@ DEPENDENCIES
   rails (~> 5.0.0, >= 5.0.0.1)
   sass-rails (~> 5.0)
   sitemap_generator
-  spring
-  spring-watcher-listen (~> 2.0.0)
   therubyracer
   tzinfo-data
   uglifier (>= 1.3.0)

bin/rails

@@ -1,9 +1,4 @@
 #!/usr/bin/env ruby
-begin
-  load File.expand_path('../spring', __FILE__)
-rescue LoadError => e
-  raise unless e.message.include?('spring')
-end
 APP_PATH = File.expand_path('../config/application', __dir__)
 require_relative '../config/boot'
 require 'rails/commands'

bin/rake

@@ -1,9 +1,4 @@
 #!/usr/bin/env ruby
-begin
-  load File.expand_path('../spring', __FILE__)
-rescue LoadError => e
-  raise unless e.message.include?('spring')
-end
 require_relative '../config/boot'
 require 'rake'
 Rake.application.run