Django ORM 需要很长时间才能加载

Question

I have this line of code in my views.py file.

fund_df = pd.DataFrame(list(FundRolling.objects.filter(code__exact=str(code), rolling=rolling, start_date__gte=start_date, end_date__lte=end_date).values()))

FundRolling is a model created in Django from MYSQL database. This model has nearly 10 million entries. This line is taking 20 seconds for execution. How can I reduce it to milliseconds?

Answer 1

I think DB index can help you to fetch data faster. Try to add this index and don't forget to run migrations. The index may take some time to build.

class FundRolling(models.Model):
    class Meta:
        index_together = [
            ['code', 'rolling', 'start_date'],
        ]