如何将活动记录数据库添加回使用--skip-active-record创建的Rails 5中

时间:2019-01-15 16:38:06

标签: ruby-on-rails activerecord ruby-on-rails-5

有问题的Rails应用最初是使用--skip-active-record创建的,因为不需要数据库。

现在需要在应用程序中添加MySQL数据库。如何将非数据库Rails应用程序转换为具有数据库?

2 个答案:

答案 0 :(得分:0)

这是我所做的:

  1. 上一级文件夹应用程序,然后再次运行rails new命令,每次按Enter即可覆盖冲突
  

使用新的my_app_name -d mysql

  1. 使用git工具查看您的应用文件(RubyMine,gitg,smartgit)中的更改

文件已更改:

config/application.rb
config/environments/development.rb
config/environments/production.rb
config/initializers/wrap_parameters.rb
Gemfile
bin/setup
bin/update
test/test_helper.rb

新文件

config/database.yml
app/models/application_record.rb
db/seeds.rb

详细信息(差异视图-已删除+已添加):

config / application.rb

-# Pick the frameworks you want:
-require "active_model/railtie"
-require "active_job/railtie"
-# require "active_record/railtie"
-require "action_controller/railtie"
-require "action_mailer/railtie"
-require "action_view/railtie"
-require "action_cable/engine"
-require "sprockets/railtie"
-require "rails/test_unit/railtie"
+require 'rails/all'

config / environments / development.rb

+# Raise an error on page load if there are pending migrations.
+config.active_record.migration_error = :page_load

config / environments / production.rb

+#迁移后不转储架构。 + config.active_record.dump_schema_after_migration = false

宝石文件

+# Use mysql as the database for Active Record
+gem 'mysql2', '>= 0.3.18', '< 0.6.0'

bin /设置

+# puts "\n== Copying sample files =="
+# unless File.exist?('config/database.yml')
+#   cp 'config/database.yml.sample', 'config/database.yml'
+# end

+puts "\n== Preparing database =="
+system! 'bin/rails db:setup'

bin / update

+puts "\n== Updating database =="
+system! 'bin/rails db:migrate'

app / models / application_record.rb

+class ApplicationRecord < ActiveRecord::Base
+  self.abstract_class = true
+end

config / database.yml

+default: &default
+  adapter: mysql2
+  encoding: utf8
+  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
+  username: root
+  password:
+  host: localhost

+development:
+  <<: *default
+  database: app-without-activerecord_development

+test:
+  <<: *default
+  database: app-without-activerecord_test

+production:
+  <<: *default
+  database: app-without-activerecord_production
+  username: app-without-activerecord
+  password: <%= ENV['APP-WITHOUT-ACTIVERECORD_DATABASE_PASSWORD'] %>

答案 1 :(得分:0)

阅读您的问题后,我要做的第一件事是在计算机上创建2个新项目

rails new test-dbrails new test-no-db --skip-active-record现在我应该有2个相同的项目,但是1个没有活动记录 现在可以在两个目录diff --brief -r test-db/ test-no-db/

之间运行差异

更改的文件

1)Gemfile

# Use postgresql as the database for Active Record
gem 'pg', '>= 0.18', '< 2.0'

2)app / assets / javascripts / application.js

//= require activestorage

3)添加此文件

#test-db/app/models/application_record.rb
class ApplicationRecord < ActiveRecord::Base
  self.abstract_class = true
end

4)test-db / bin / setup

chdir APP_ROOT do
  ...
  puts "\n== Preparing database =="
  system! 'bin/rails db:setup'
  ...
end

您可以扔掉其余文件,以查看有什么不同。 我知道这不是您想要的解决方案,而是我会做的