rails whenver gem , running a command only if certain condition passes.

cron, ruby-on-rails, whenever

Solution

if you want to only schedule the task if the condition is true then I don't think its possible you can schedule a task then when its time for running the task, the code can decide if it should be run or not, depending on your conditions

One possible solution i can think of is that i create a runner for this and check that condition there.Something like:

Yes this is one way of handeling this, however IMO the best behavior when using whenever is creating a rake task that checks for conditions then executes your code or perform your job

Something like:

Rake Task

namespace :user do
  desc "description"
  task check_for_new: :environment do
    if User.any_new_user? 
      # code
    end
  end
end

in your `schedule.rb` file

every 1.day, :at => '6:00 am' do
  rake "user:check_for_new"
end

Problem

We are using whenever gem with rails on our project. I understand that we can schedule a command using whenever gem like this. ``` every 1.day, :at => '6:00 am' do command "echo 'hello'" end ``` but my problem is that i want to execute this command only when some condition is met. something like this. ``` every 1.day, :at => '6:00 am' do if User.any_new_user? command "echo 'hello'" end end ``` how can we achieve this with the whenever and rails? One possible solution i can think of is that i create a runner for this and check that condition there.Something like: ``` every 1.day, :at => '6:00 am' do runner "User.say_conditional_hello" end ``` and inside my user model: ``` def self.say_conditional_hello `echo "Hello"` end ``` Any suggestions on this approach or any new approach will be really helpful. Thanks in advance!.

Original source