About Atomic Transactions and Background Tasks
When calling a background task from a view with atomic transaction that creates model instances, make sure that you use transaction.on_commit(). Otherwise, the background task might be executed before the instances are reachable.
This also applies for administration views.
from django.db import models, transaction
from .tasks import generate_post_preview
class Post(models.Model):
# ...
def save(self, *args, **kwargs):
super().save(*args, **kwargs)
transaction.on_commit(
lambda: generate_post_preview(post_id=self.pk)
)
Here generate_post_preview() is a Huey task.
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