Re: how to use reverse query data from a child model to do arithmetic's in parent model?

On March 28, 2021 1:42:50 AM CDT, Vansh Jagyasi -IIITK <vansh20bcs179@iiitkottayam.ac.in> wrote:
>I have created a model location, and a model transaction which has a
>many
>to one relation with location which has the information of a
>transaction
>done at a particular location, say 3 dollars spent at macdonalds, now I
>
>want to find all the transactions related to a particular location and
>add
>the amount to find the total amount spent,please help

You probably want to use `Sum` from Django aggregate:

https://docs.djangoproject.com/en/3.1/topics/db/aggregation/

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