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Table of Contents
What is rake
Rake is a task runner.
How to Write a Rake Task
Here’s a simple Rake task:
namespace :greet do
desc "Say Hello"
task hello: :environment do
puts "Hello"
end
endYou can put this code inside a file named Rakefile, or if you’re using Rails, you can save this under lib/tasks/apple.rake.
To run this task:
$ rake greet:helloDependent Tasks
Rake allows you to define a list of other tasks that must run before the current task.
Example:
task :first do
puts "Run this task first"
end
task :second => [:first] do
puts "Should put this after :first"
endThis would return:
Run this task first
Should put this after :firstExecute something after migration
namespace :db do
def my_appended_code
puts 'this code gets run after the original rails db:migrate task'
puts 'it only runs if the migration did not throw any exceptions'
end
task :migrate do
my_appended_code
end
end