Hello,
I have lot of lists like follow:
(Name1): (V1, V2, V3, V4, ..)
And I use many threads to create many db objects:
company = Company(Name)
for x in vector:
v = CompanyValue(company=company, value=x)
values.append(v)
class CompanyValue(models.Model):
company = models.ForeignKey('Company', on_delete=models.CASCADE)
value = FloatField
This pool of threads return all lists, what I combine, filter and want put
to database in one bulk_create call.
Suddenly, I found, company.id is not ready to be linked in CompanyValue,
follow code does not works:
Company.objects.bulk_create(companies)
CompanyValue.objects.bulk_create(values) # value.company_id is null
here
No way to save objects in my threads, because I need to filter objects and
can do it only when all of them are collected. Also, it has performance
issues 100k+ of requests is slowly enough. I have two ways to resolve:
1. I can make intermediate class or tuple and create CompanyValue objects
only when companies is saved to db. Hard to support, hard to filter, not so
clean.
2. I can use dirty hack to update _id field:
for v in values:
v.company = v.company
Can you advice more ways for me? It seems, I don't know something from
django features to make it elegant.
I see 11 years old issue here (https://code.djangoproject.com/ticket/9553
<https://code.djangoproject.com/ticket/9553#no1>) and it marked as intended
behaviour.
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