Building rake tasks makes in much easier for manual execution of scripts and plays a big role when scheduling a job.
We might have taken the command 'rake db:migrate' lightly, but it is the time to explore the components behind this.
'Rake --tasks ' lists the available tasks that can be performed by rake
We can create our now Rake tasks by creating .rake files in side lib/tasks dir in rails app.
Introducing NAMESPACE and TASK
TASK : This block defines what actually you want your ruby code to perform.
task :my_first_rake_task do
puts "This is my first rake code"
end
save this sample code in lib/tasks with any name ( with rake ext. )
Now, in cmd run 'rake my_first_rake_task'
...... existed!?? theres still more......
NAMESPACE
To manage your tasks in a better/ logical way you can bind them to a NAMESPACE
USAGE
namespace :test do
task :my_first_rake_task do
puts "This is my first rake code"
end
end
in CMD run rake test:my_first_rake_task
Description
Now that you have learned how to create a rake task, Next question is ........ how to give description for the task you have created????
simple...
use desc
namespace :test do
desc "This is a simple example to show the usage of rake tasks in rails"
task :my_first_rake_task do
puts "This is my first rake code"
end
end
In CMD type RAKE --tasks
one of the entry in the list will be
rake test:my_first_rake_task #This is a simple example to show the usage of rake tasks in rails
