adding extra row in django inline template

Question

I have theses model and admin model as displayed beloy

I want in the model for transaction to display total amount ( thats is the sum of amount field)

There is not method for change list in Inline how do I do this

class TransactionAdmin(admin.ModelAdmin):
    inlines = [TransactionAmountInline, AmountPaidInline, PhotosInline]
    fields = ('customer', 'title', 'description', 'created_at')
    readonly_fields = ('updated_at',)
    list_display = ('title', 'customer')


class AmountPaidInline(admin.TabularInline):
   model = AmountPaid
   extra = 0


class AmountPaid(models.Model):
     transaction = models.ForeignKey(Transactions)
     description = models.TextField(null=True)
     amount = models.DecimalField(max_digits=19, decimal_places=4)
     created_at = models.DateTimeField(auto_now_add=True)
     updated_at = models.DateTimeField(auto_now=True)

Matias Benedetto · Accepted Answer · 2014-12-08 19:29:37Z

1

You have to add this function to your Transactions model.

def sum_amount (self):
    return AmountPaid.objects.filter(transaction=self).aggregate(total=Sum('amount'))['total']

And add the function name to the list_display option of TransactionAdmin, the model admin:

list_display = ('title', 'customer', 'sum_amount')

edited Dec 8, 2014 at 19:29

answered Dec 8, 2014 at 4:35

Matias Benedetto

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3 Comments

user2388404 Over a year ago

thanks for your answer actually what I what I want is to display the sum_amount in the change form( when you click on the transaction link) I know I can override the change list view to and add the total amount to the extra context but I want to display the total amount in the AmountPaidInline form that its going to be displayed

user2388404 Over a year ago

In simple I want to add another row to the inline to display the total amount in the AmountPaind model

user2388404 Over a year ago

please give me more help in this

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