try082

Allow `truncate` for SQLite3 adapter and add `rails db:seed:replant`
rails/rails#34779

Gemfile

@@ -5,7 +5,9 @@ ruby '2.6.4'
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 6.0.0'
-# Use postgresql as the database for Active Record
+# Use mysql as the library database for Active Record
+gem 'mysql2', '>= 0.4.4'
+# Use postgresql as the backbone database for Active Record
 gem 'pg', '>= 0.18', '< 2.0'
 # Use Puma as the app server
 gem 'puma', '~> 3.11'

Gemfile.lock

@@ -100,6 +100,7 @@ GEM
     mini_portile2 (2.4.0)
     minitest (5.11.3)
     msgpack (1.3.1)
+    mysql2 (0.5.2)
     nio4r (2.5.1)
     nokogiri (1.10.4)
       mini_portile2 (~> 2.4.0)
@@ -206,6 +207,7 @@ DEPENDENCIES
   capybara (>= 2.15)
   jbuilder (~> 2.7)
   listen (>= 3.0.5, < 3.2)
+  mysql2 (>= 0.4.4)
   pg (>= 0.18, < 2.0)
   puma (~> 3.11)
   rails (~> 6.0.0)

app/models/book.rb

@@ -0,0 +1,2 @@
+class Book < ApplicationRecord
+end

app/models/user.rb

@@ -0,0 +1,2 @@
+class User < ApplicationRecord
+end

config/database.yml

@@ -1,88 +1,47 @@
-# PostgreSQL. Versions 9.3 and up are supported.
-#
-# Install the pg driver:
-#   gem install pg
-# On macOS with Homebrew:
-#   gem install pg -- --with-pg-config=/usr/local/bin/pg_config
-# On macOS with MacPorts:
-#   gem install pg -- --with-pg-config=/opt/local/lib/postgresql84/bin/pg_config
-# On Windows:
-#   gem install pg
-#       Choose the win32 build.
-#       Install PostgreSQL and put its /bin directory on your path.
-#
-# Configure Using Gemfile
-# gem 'pg'
-#
-default: &default
+default_postgresql: &default_postgresql
   adapter: postgresql
   encoding: unicode
   # For details on connection pooling, see Rails configuration guide
   # https://guides.rubyonrails.org/configuring.html#database-pooling
   pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
-  host: db
+  host: postgres
   user: <%= ENV.fetch("POSTGRES_USER") %>
   password: <%= ENV.fetch("POSTGRES_PASSWORD") %>
 
-development:
-  <<: *default
-  database: app_development
-
-  # The specified database role being used to connect to postgres.
-  # To create additional roles in postgres see `$ createuser --help`.
-  # When left blank, postgres will use the default role. This is
-  # the same name as the operating system user that initialized the database.
-  #username: app
-
-  # The password associated with the postgres role (username).
-  #password:
-
-  # Connect on a TCP socket. Omitted by default since the client uses a
-  # domain socket that doesn't need configuration. Windows does not have
-  # domain sockets, so uncomment these lines.
-  #host: localhost
+default_mysql: &default_mysql
+  adapter: mysql2
+  encoding: utf8mb4
+  username: root
+  password:
+  host: mysql
 
-  # The TCP port the server listens on. Defaults to 5432.
-  # If your server runs on a different port number, change accordingly.
-  #port: 5432
-
-  # Schema search path. The server defaults to $user,public
-  #schema_search_path: myapp,sharedapp,public
-
-  # Minimum log levels, in increasing order:
-  #   debug5, debug4, debug3, debug2, debug1,
-  #   log, notice, warning, error, fatal, and panic
-  # Defaults to warning.
-  #min_messages: notice
+development:
+  backbone:
+    <<: *default_postgresql
+    database: backbone_development
+  library:
+    <<: *default_mysql
+    database: library_development
+    migrations_paths: db/library_migrate
 
-# Warning: The database defined as "test" will be erased and
-# re-generated from your development database when you run "rake".
-# Do not set this db to the same as development or production.
 test:
-  <<: *default
-  database: app_test
+  backbone:
+    <<: *default_postgresql
+    database: backbone_test
+  library:
+    <<: *default_mysql
+    database: library_test
+    migrations_paths: db/library_migrate
 
-# As with config/credentials.yml, you never want to store sensitive information,
-# like your database password, in your source code. If your source code is
-# ever seen by anyone, they now have access to your database.
-#
-# Instead, provide the password as a unix environment variable when you boot
-# the app. Read https://guides.rubyonrails.org/configuring.html#configuring-a-database
-# for a full rundown on how to provide these environment variables in a
-# production deployment.
-#
-# On Heroku and other platform providers, you may have a full connection URL
-# available as an environment variable. For example:
-#
-#   DATABASE_URL="postgres://myuser:mypass@localhost/somedatabase"
-#
-# You can use this database configuration with:
-#
-#   production:
-#     url: <%= ENV['DATABASE_URL'] %>
-#
 production:
-  <<: *default
-  database: app_production
-  username: app
-  password: <%= ENV['APP_DATABASE_PASSWORD'] %>
+  backbone:
+    <<: *default_postgresql
+    database: backbone_production
+    username: backbone
+    password: <%= ENV['BACKBONE_DATABASE_PASSWORD'] %>
+  library:
+    <<: *default_mysql
+    database: library_production
+    migrations_paths: db/library_migrate
+    username: library
+    password: <%= ENV['LIBRARY_DATABASE_PASSWORD'] %>

db/library_migrate/20190904113005_create_books.rb

@@ -0,0 +1,9 @@
+class CreateBooks < ActiveRecord::Migration[6.0]
+  def change
+    create_table :books do |t|
+      t.string :title
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20190904112936_create_users.rb

@@ -0,0 +1,9 @@
+class CreateUsers < ActiveRecord::Migration[6.0]
+  def change
+    create_table :users do |t|
+      t.string :name
+
+      t.timestamps
+    end
+  end
+end

docker-compose.yml

@@ -12,16 +12,26 @@ services:
     environment:
       - POSTGRES_USER
       - POSTGRES_PASSWORD
-  db:
+  postgres:
     image: postgres:10.7-alpine
     volumes:
       - pgsqldb:/var/lib/postgresql/data
     environment:
       - POSTGRES_USER
       - POSTGRES_PASSWORD
 
+  mysql:
+    image: mysql:8.0.17
+    command: --default-authentication-plugin=mysql_native_password
+    volumes:
+      - mysqldb:/var/lib/mysql
+    environment:
+      MYSQL_ALLOW_EMPTY_PASSWORD: 'yes'
+
 volumes:
   pgsqldb:
     driver: local
+  mysqldb:
+    driver: local
   bundle:
     driver: local

test/fixtures/books.yml

@@ -0,0 +1,7 @@
+# Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  title: MyString
+
+two:
+  title: MyString

test/fixtures/users.yml

@@ -0,0 +1,7 @@
+# Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  name: MyString
+
+two:
+  name: MyString

test/models/book_test.rb

@@ -0,0 +1,7 @@
+require 'test_helper'
+
+class BookTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end

test/models/user_test.rb

@@ -0,0 +1,7 @@
+require 'test_helper'
+
+class UserTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end