feat: 🎸 RDBMS を MySQL から PostgreSQL に変更した (#148)

* feat: 🎸 RDBMS を MySQL から PostgreSQL に変更した

* ci: 🎡 CircleCI は不要になったので削除

Gemfile

@@ -9,8 +9,8 @@ gem 'coffee-rails'
 gem 'dotenv-rails'
 gem 'jbuilder'
 gem 'kaminari'
-gem 'mysql2'
 gem 'nokogiri'
+gem 'pg'
 gem 'puma'
 gem 'rails'
 gem 'sass-rails'

Gemfile.lock

@@ -159,7 +159,6 @@ GEM
     mini_mime (1.1.2)
     minitest (5.16.3)
     multipart-post (2.2.3)
-    mysql2 (0.5.4)
     naught (1.1.0)
     net-imap (0.3.1)
       net-protocol
@@ -175,6 +174,7 @@ GEM
     parallel (1.22.1)
     parser (3.1.2.1)
       ast (~> 2.4.1)
+    pg (1.4.5)
     public_suffix (5.0.0)
     puma (6.0.0)
       nio4r (~> 2.0)
@@ -334,8 +334,8 @@ DEPENDENCIES
   jbuilder
   kaminari
   listen
-  mysql2
   nokogiri
+  pg
   puma
   rails
   rspec-rails

config/database.yml

@@ -1,34 +1,36 @@
 default: &default
-  adapter: mysql2
-  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
+  adapter: postgresql
+  encoding: unicode
+  pool: <%= ENV['RAILS_MAX_THREADS'] || 5 %>
   timeout: 5000
-  encoding: utf8mb4
   strict: false
-  host: <%= ENV.fetch('MYSQL_HOST') %>
-  port: <%= ENV.fetch('MYSQL_PORT') %>
-  username: <%= ENV.fetch('MYSQL_USERNAME') %>
-  password: <%= ENV.fetch('MYSQL_PASSWORD') %>
 
 development:
   <<: *default
-  host: <%= ENV['MYSQL_HOST_DEVELOPMENT'] || ENV.fetch('MYSQL_HOST') %>
-  port: <%= ENV['MYSQL_PORT_DEVELOPMENT'] || ENV.fetch('MYSQL_PORT') %>
-  username: <%= ENV['MYSQL_USERNAME_DEVELOPMENT'] || ENV.fetch('MYSQL_USERNAME') %>
-  password: <%= ENV['MYSQL_PASSWORD_DEVELOPMENT'] || ENV.fetch('MYSQL_PASSWORD') %>
-  database: <%= ENV['MYSQL_DATABASE_DEVELOPMENT'] || 'suikoden_election_2017_development' %>
+  host: <%= ENV['PG_HOST_DEVELOPMENT'] || 'localhost' %>
+  port: <%= ENV['PG_PORT_DEVELOPMENT'] || 5432 %>
+  username: <%= ENV['PG_USERNAME_DEVELOPMENT'] || 'root' %>
+  password: <%= ENV['PG_PASSWORD_DEVELOPMENT'] || 'password' %>
+  database: <%= ENV['PG_DATABASE_DEVELOPMENT'] || 'gss2017_development' %>
+  template: template0
+  collation: ja_JP.UTF-8
+  ctype: ja_JP.UTF-8
 
 production:
   <<: *default
-  host: <%= ENV['MYSQL_HOST_PRODUCTION'] || ENV.fetch('MYSQL_HOST') %>
-  port: <%= ENV['MYSQL_PORT_PRODUCTION'] || ENV.fetch('MYSQL_PORT') %>
-  username: <%= ENV['MYSQL_USERNAME_PRODUCTION'] || ENV.fetch('MYSQL_USERNAME') %>
-  password: <%= ENV['MYSQL_PASSWORD_PRODUCTION'] || ENV.fetch('MYSQL_PASSWORD') %>
-  database: <%= ENV['MYSQL_DATABASE_PRODUCTION'] || 'suikoden_election_2017_production' %>
+  host: <%= ENV['PG_HOST_PRODUCTION'] || 'localhost' %>
+  port: <%= ENV['PG_PORT_PRODUCTION'] || 5432 %>
+  username: <%= ENV['PG_USERNAME_PRODUCTION'] || 'root' %>
+  password: <%= ENV['PG_PASSWORD_PRODUCTION'] || 'password' %>
+  database: <%= ENV['PG_DATABASE_PRODUCTION'] || 'gss2017_production' %>
+  template: template0
+  collation: ja_JP.UTF-8
+  ctype: ja_JP.UTF-8
 
 test:
   <<: *default
-  host: <%= ENV['MYSQL_HOST_TEST'] || '127.0.0.1' %>
-  port: <%= ENV['MYSQL_PORT_TEST'] || 3306 %>
-  username: <%= ENV['MYSQL_USERNAME_TEST'] || 'gss2017' %>
-  password: <%= ENV['MYSQL_PASSWORD_TEST'] || 'gss2017_pasword' %>
-  database: <%= ENV['MYSQL_DATABASE_TEST'] || 'suikoden_election_2017_test' %>
+  host: <%= ENV['PG_HOST_TEST'] || 'localhost' %>
+  port: <%= ENV['PG_PORT_TEST'] || 5432 %>
+  username: <%= ENV['PG_USERNAME_TEST'] || 'gss2017' %>
+  password: <%= ENV['PG_PASSWORD_TEST'] || 'gss2017_password' %>
+  database: <%= ENV['PG_DATABASE_TEST'] || 'gss2017_test' %>