Answers for "Django merge duplicate rows"

Django merge duplicate rows

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# Django merge duplicate rows
from django.db.models import Sum

YourModel.objects.values('name', 'user_id').annotate(total=Sum('amount')).values('name', 'user_id', 'total')

django column to have duplicate of other

class Person(models.Model):
    amount = models.CharField(max_length=50,blank=True, null=True)
    amount_paid = models.CharField(max_length=60,default='5000', null=True)

    def save(self, *args, **kwargs):
       self.amount_paid = self.amount
       super().save(*args, **kwargs)