On 3/05/2018 7:00 AM, jt.oldn...@gmail.com wrote:
I'm new to Django and web development in general (C++ background) and
I've got amazingly far very quickly, but there's one thing I've been
struggling with for a couple days now :-(. Forgive me if I screw up
the lingo.
I've got a ModelAdmin page for registrants of a conference which has
fields for Employee ID, Name, email etc. The registrant does not have
to be an employee, but if they are I could lookup their name, email
etc. from an external source (already have the Python code for this).
I'd like to have a button next to the employee id field which would
lookup the employee's details and fill in the appropriate fields. This
seems to me that it shouldn't be too hard but I am spinning my wheels
here. Do I need to ditch ModelAdmin? Can someone please point me in
the right direction.
You may not need a button which, in the Admin, implies javascript and an
API. In your model you can intercept the save() method to visit another
database/system to fetch the detail before the record is saved. There
are probably many ways to do this. One uses a pre-save signal [1] but I
prefer to override save() [2].
class Employee(models.Model):
... all the fields etc
fetchdata = models.BooleanField(default=False, blank=True)
def save(self, *args, **kwargs):
if self.fetchdata:
self.fetchdata = False
try:
self.this, self.that = self.fetch_data()
except Exception:
# avoid losing other changes
pass
super(Substance, self).save(*args, **kwargs)
def fetch_data(self):
#call external database with employee ID and return necessary
detail
return this, that
[1] https://docs.djangoproject.com/en/1.11/ref/signals/#pre-save
[2]
https://docs.djangoproject.com/en/2.0/ref/models/instances/#saving-objects
hth
Thanks,
JT
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