class ActiveJob::QueueAdapters::InlineAdapter

Rails.application.config.active_job.queue_adapter = :inline
To use the Inline set the queue_adapter config to :inline.
immediately.
When enqueueing jobs with the Inline adapter the job will be executed
== Active Job Inline adapter

def enqueue(job) #:nodoc:

:nodoc: 
def enqueue(job) #:nodoc:
  Base.execute(job.serialize)
end

def enqueue_at(*) #:nodoc:

:nodoc: 
def enqueue_at(*) #:nodoc:
  raise NotImplementedError.new("Use a queueing backend to enqueue jobs in the future. Read more at https://github.com/rails/activejob")
end