芹菜任务调用另一个任务

Question

I have two files. One is the main file of my programm and it has all celery tasks that have to be done:

chord(
    tasks.task_01.subtask(task_id='task_01'),
    tasks.task_02.subtask(task_id='task_02')
).delay()

Then I have a task.py file:

@task(bind=True)
def task_01(self, result=None):

    headers = models.Header.objects.all()
    group(extract_emails.subtask((header,)) for header in headers).delay()

And finally the extract_emails taks:

@task(bind=True)
def extract_emails(header, result=None):

    print header.id  #to check in celery log if the header item is recieved
    url_parser.find_emails(header)

So my goal is to execute task_01 so that it runs a set of 'extract_emails' tasks in parallel with the 'header' as an argument. I expect 'extract_emails' task to recieve this header and run some simple code with it.

When Im trying to do it I get: AttributeError("'extract_emails' object has no attribute 'id'",)

Where does it come from?? Im not even passing the name of the task as an argument! What is wrong with my code?

Answer 1

In my particular example 'extract_emails' task should be written this way:

@task(bind=True)
def extract_emails(self, result=None):

    header = self.request.args[1] 
    url_parser.find_emails(header)

Just use self.request.PARAM to extract what you need. More information you can find in official docs .