Two Ways to Stop the Series of Actions

1. Use set_failure! for stopping execution when it is due to failure.
2. If you want to skip succeeding actions that is not due to a failure, use skip_all!.

class SaveComment
  include LightService::Action

  executed do |context|
    comment = context.fetch(:comment)
    post = context.fetch(:post)

    unless comment.commenter.can_auto_approve_own_comment
      # calling skip_all! will bypass PublishCommentAction execution
      context.skip_all!
    end

    if post.errors.any?
      # calling set_failure! will bypass PublishCommentAction execution
      context.set_failure!
    end

    post.comments << comment
    post.save
  end
end