I'd like to update more than one objects at same time, when the register date achieve more than 6 days:
The Idea is update all issue_status from 'On Going' to 'Pending' for each objects
Is it necessary iterate it?
Below is my current code and error:
models.py
class MaintenanceIssue(models.Model):
issue_status = models.CharField(max_length=30, choices=[('pending', 'Pending'), ('on going',
'On going'), ('done', 'Done')])
register_dt = models.DateTimeField(blank=True, null=True)
@property
def pending_issue(self):
issue_time_diff = (datetime.now() - self.register_dt).days
return issue_time_diff
views.py:
on_going_issues = MaintenanceIssue.objects.get(issue_status='On Going')
if on_going_issues.pending_issue > 6:
on_going_issues.issue_status = 'Pending'
on_going_issues.save()
get() returned more than one MaintenanceIssue -- it returned 61!
To update all objects in one go, you'll need to create a query that selects all objects you want to update then call update on it
MaintenanceIssue.objects.filter(
issue_status='On Going',
register_dt__lt=datetime.datetime.now() - datetime.timedelta(days=6)
).update(issue_status='Pending')
That filter does not exactly match your property, the following should get you a better match although it's a bit uglier
from django.db.models import F, Value
from django.db.models.functions import ExtractDay
MaintenanceIssue.objects.filter(
issue_status='On Going'
).annotate(
days=ExtractDay(Value(datetime.datetime.now()) - F('register_dt'))
).filter(
days__gt=6
).update(issue_status='Pending')
at:
on_going_issues = MaintenanceIssue.objects.get(issue_status='On Going')
if on_going_issues.pending_issue > 6:
on_going_issues.issue_status = 'Pending'
on_going_issues.save()
should filter by the field and then loop through each
on_going_issues = MaintenanceIssue.objects.filter(issue_status='On Going')
for one in on_going_issues:
if one.pending_issue > 6:
one.issue_status = "Pending"
one.save()
you can do it with one line and it will be much faster
MaintenanceIssue.objects.filter(issue_status='On Going').update(issue_status = "Pending")