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all:
I know how to show all the tasks by typing rake -T, and I know how to add my own tasks by add rake files under RAILS_ROOT/lib/tasks. But if I want to view the source code like rake db:migrate or rake doc:app to see how they work, where can I find those codes?
thank you all :)
eddie
692
rake extension and are placed in Rails. root/lib/tasks . You can create these custom rake tasks with the bin/rails generate task command. If your need to interact with your application models, perform database queries and so on, your task should depend on the environment task, which will load your application code.
You can get a list of Rake tasks available to you, which will often depend on your current directory, by typing rake --tasks . Each task has a description, and should help you find the thing you need.
In any Rails application you can see which rake tasks are available - either by running rake -AT (or rake --all --tasks) to see all tasks, or rake -T (or rake --tasks ) to see all tasks with descriptions.
Rake is a popular task runner for Ruby and Rails applications. For example, Rails provides the predefined Rake tasks for creating databases, running migrations, and performing tests. You can also create custom tasks to automate specific actions - run code analysis tools, backup databases, and so on.
All rails internal rake tasks are in railties/lib/rails/tasks
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All rake tasks of database is in active record.
https://github.com/rails/rails/blob/f47b4236e089b07cb683ee9b7ff8b06111a0ec10/activerecord/lib/active_record/railties/databases.rake
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