像数据库迁移？

问题描述

有没有容易安装/使用（在unix上）数据库迁移工具，如Rails迁移？我真的很喜欢这个想法，但是安装ruby / rails纯粹是为了管理我的数据库迁移似乎过分。

Is there any easy to install/use (on unix) database migration tools like Rails Migrations? I really like the idea, but installing ruby/rails purely to manage my database migrations seems overkill.

推荐答案

只需使用ActiveRecord和简单Rakefile。例如，如果将迁移放在 db / migrate 目录中，并且有一个 database.yml 文件， db config，这个简单的Rakefile应该工作：

Just use ActiveRecord and a simple Rakefile. For example, if you put your migrations in a db/migrate directory and have a database.yml file that has your db config, this simple Rakefile should work:

Rakefile：

require 'active_record'
require 'yaml'

desc "Migrate the database through scripts in db/migrate. Target specific version with VERSION=x"
task :migrate => :environment do
  ActiveRecord::Migrator.migrate('db/migrate', ENV["VERSION"] ? ENV["VERSION"].to_i : nil)
end

task :environment do
  ActiveRecord::Base.establish_connection(YAML::load(File.open('database.yml')))
  ActiveRecord::Base.logger = Logger.new(STDOUT)
end

database.yml ：

adapter: mysql
encoding: utf8
database: test_database
username: root
password:
host: localhost

之后，您可以运行

Afterwards, you'll be able to run rake migrate and have all the migration goodness without a surrounding rails app.

或者，我有一组执行非常相似的bash脚本函数到ActiveRecord迁移，但它们只能与Oracle一起使用。我过去使用它们之前切换到Ruby和Rails。他们有点复杂，我不提供他们的支持，但如果你有兴趣，请随时与我联系。

Alternatively, I have a set of bash scripts that perform a very similar function to ActiveRecord migrations, but they only work with Oracle. I used to use them before switching to Ruby and Rails. They are somewhat complicated and I provide no support for them, but if you are interested, feel free to contact me.

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