如何在我的Rails模型中获取当前rake任务的名称？

Question

I have some problems with one of gem supporting ActiveModel caching. When I'm using observer for cached model, during application initialization it tries to describe table to get all fields names.

The same thing is done when rake task is running, including db:migration. In that case there is some circular reference error. I'd like to detect current rake task, to skip gem initialization, but I don't know how to find out was code invoked through rake task. How to check it?

Answer 1

I dont get exactly what you are trying to do, but here is an example of getting the task name.

  task :testing do |task_name|
    puts task_name
  end

Answer 2

This question has been asked a few places, and I didn't think any of the answers were very good... I think the answer is to check Rake.application.top_level_tasks , which is a list of tasks that will be run. Rake doesn't necessarily run just one task.

Answer 3

If you run your task via rake task or bundle exec rake task you can check it in your initializer simply by:

if $0.end_with?('rake')
  # rake stuff
else
  # non-rake stuff
end

You can use $PROGRAM_NAME instead of $0 if you like.