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[英]How to configure a Database in sqlite3 with a Ruby on Rails project
[英]How to configure Ruby on Rails with no database?
对于当前不需要数据库的小型网站项目,使用 Ruby on Rails 会很方便。 我知道我可以在 MySQL 中创建一个空数据库并从那里开始,但是有没有人知道在没有数据库的情况下运行 Rails 的更好方法?
谢谢
对于Rails 3和Rails 4 :
使用
-O
(大写 'O')或--skip-activerecord
选项生成没有数据库的应用程序。
rails new myApp -O
要么
rails new myApp --skip-activerecord
这个答案是从这里转发的
对于Rails 5 :
使用
--skip-active-record
选项生成没有数据库的应用程序
请注意与以前的 Rails 版本相反的额外连字符“-” 。
rails new myApp --skip-active-record
对于现有的 Rails 4/5/6 项目,在config/application.rb
文件中包含以下行:
require 'rails/all' # or `require "rails"' in newer versions
(作为参考,该行正在加载此文件)
因此,您必须按如下方式分别加载每个库,而不是加载 ALL:
# active_record is what we're not going to use it, so comment it "just in case"
# require "active_record/railtie"
# This is not loaded in rails/all but inside active_record so add it if
# you want your models work as expected
require "active_model/railtie"
# And now the rest
require "action_controller/railtie"
require "action_mailer/railtie"
require "action_view/railtie"
require "active_job/railtie" # Only for Rails >= 4.2
require "action_cable/engine" # Only for Rails >= 5.0
require "sprockets/railtie"
require "rails/test_unit/railtie"
# All these depend on active_record, so they should be excluded also
# require "action_text/engine" # Only for Rails >= 6.0
# require "action_mailbox/engine" # Only for Rails >= 6.0
# require "active_storage/engine" # Only for Rails >= 5.2
请留意评论以了解有关您的 Rails 版本的加载内容。
还要检查以下文件(以防万一)并注释以下几行:
# package.json
"@rails/activestorage": "^6.0.0",
# app/javascript/packs/application.js
require("@rails/activestorage").start()
# bin/setup
system! 'bin/rails db:prepare'
# config/environments/development.rb
config.active_storage.service = :local # For Rails >= 5.2
config.active_record.migration_error = :page_load
config.active_record.verbose_query_logs = true
# config/environments/test.rb
config.active_storage.service = :test # For Rails >= 5.2
# config/environments/production.rb
config.active_storage.service = :local # For Rails >= 5.2
config.active_record.dump_schema_after_migration = false
# spec/rails_helper.rb
ActiveRecord::Migration.maintain_test_schema!
# test/test_helper.rb
fixtures :all # In case you're using fixtures
# Only for Rails >= 5.0
#config/initializers/new_framework_defaults.rb
Rails.application.config.active_record.belongs_to_required_by_default = true
还要删除模型文件中对ActiveRecord::Base
任何引用(如果适用,也可以简单地删除这些文件)。 例如,自动生成的app/models/application_record.rb
文件。
在environment.rb
文件中取消注释这一行:
config.frameworks -= [ :active_record, :active_resource, :action_mailer]
更新:请参阅' Rails 3 - 如何完全避免使用数据库? '使用Rails 3进行更新的问题。
在 Rails 4 中开始新项目时,您可以使用 -O 或 --skip-active-record
rails new my_project -O
rails new my_project --skip-active-record
如果您已经创建了一个项目,则需要发表评论
require "active_record/railtie"
从 config/application.rb 和
config.active_record.migration_error = :page_load
来自 config/environments/development.rb
为了支持 Rails 6 rc1 和activerecord-nulldb-adapter
gem,我们需要一个猴子补丁
在config/initializers/null_db_adapter_monkey_patches.rb
module ActiveRecord
module ConnectionAdapters
class NullDBAdapter < ActiveRecord::ConnectionAdapters::AbstractAdapter
def new_table_definition(table_name = nil, is_temporary = nil)
TableDefinition.new(table_name, is_temporary)
end
end
end
end
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