Rails——可以在通用 rake 任务中运行迁移方法吗？

发布于 2024-09-12 01:19:44 字数 273 浏览 3 评论 0原文

我知道这不是最佳实践，而且很可能甚至不应该使用，因为这就是迁移的用途，但我想知道是否可以在常规 rake 任务中执行特定于迁移的命令。比如：

namespace :dummy do
    task :update => :environment do
      add_column :users, :deleted, :boolean, { :null => false, :default => false }
   end
end

谢谢

原文

I know this is not best practice, and most likely shouldn't even be used, as thats what migrations are used for, but I was wondering if its possible to execute migration specific commands in a regular rake task. Something like:

namespace :dummy do
    task :update => :environment do
      add_column :users, :deleted, :boolean, { :null => false, :default => false }
   end
end

Thanks

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浅唱ヾ落雨殇 2024-09-19 01:19:44

可以在你的 rake 任务中运行任意伪迁移：

namespace :dummy do
  task :update => :environment do
    ActiveRecord::Base.connection.add_column :users, :deleted, :boolean, :null => false, :default => false
  end
end

如果你做了很多这样的事情，请使用简写：

namespace :dummy do
  task :update => :environment do
    c = ActiveRecord::Base.connection

    c.add_column :users, :deleted, :boolean, :null => false, :default => false
  end
end

It is possible to run arbitrary pseudo-migrations in your rake tasks:

namespace :dummy do
  task :update => :environment do
    ActiveRecord::Base.connection.add_column :users, :deleted, :boolean, :null => false, :default => false
  end
end

If you're doing a lot of that sort of thing, use short-hand:

namespace :dummy do
  task :update => :environment do
    c = ActiveRecord::Base.connection

    c.add_column :users, :deleted, :boolean, :null => false, :default => false
  end
end

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叹沉浮 2024-09-19 01:19:44

是的，您应该这样做：

namespace :dummy do
  task :update => :enviroment do
    ActiveRecord::Migration.send(:add_column, :users, :deleted, :boolean, { :null => false, :default => false })
  end
end

未测试，但这里重要的是包含迁移类，然后发送您希望运行的方法。

更新直接通过@tadman使用ActiveRecord::Migration

Yes, you should do something like this:

namespace :dummy do
  task :update => :enviroment do
    ActiveRecord::Migration.send(:add_column, :users, :deleted, :boolean, { :null => false, :default => false })
  end
end

Not tested, but the important thing here is to include the migration class and then send the method you wish to run.

UPDATED to use ActiveRecord::Migration directly via @tadman

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