On Jul 10, 8:39 am, bruno <bruno.prig...@gmail.com> wrote:
> Hi,
>
> I'm new in django and I have problem with importing models
>
> I have two class : Job and Event
>
> The Job class defines a method run_job() wich do something and log the
> result by creating a new Event so I need to import the Event class
> from file app/events/models.py
> The Event class reference the job who created the log entry so I need
> to import the Job class from file app/jobs/models.py
>
> file : app/jobs/models.py
> --------------------------------------
>
> from events.models import Event
> ...
>
> class Job(models.Model):
> ...
> def run_job(self):
> result = do_something()
> e = Event(timestamp_gmt=datetime.now(), job=self,
> result=result)
> self.save()
> return result
>
> file : app/events/models.py
> ------------------------------------------
>
> from jobs.models import Job
> ...
>
> class Event(models.Model):
> ...
> timestamp_gmt = models.DateTimeField(null=False, editable=False)
> job = models.ForeignKey(Job, blank=False, null=False)
>
> When I start the serveur I have the following error :
> ...
> File "app\jobs\models.py", line 8, in <module>
> from events.models import Event
> File "app\events\models.py", line 12, in <module>
> class Event(models.Model):
> File "app\events\models.py", line 14, in Event
> job = models.ForeignKey(Job, blank=False, null=False)
> NameError: name 'Job' is not defined
>
> It's like Django doesn't like the cross import between Job and Event.
> Anyone can tell me what I'm doing wrong ?
> I think the easy solution is to declar the Event class in the Job
> model file but I'd like to keep them in different files.
You could move the Event import to the run_job method which is the
only place where your code needs it:
file : app/jobs/models.py
--------------------------------------
class Job(models.Model):
...
def run_job(self):
from events.models import Event
result = do_something()
e = Event(timestamp_gmt=datetime.now(), job=self,
result=result)
self.save()
return result
-RD
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