Depends on your models, but write a small function that returns the balance?
def balance(self):
return self.entitlement - self.num_days
(for instance)
L.
------
The most dangerous phrase in the language is, "We've always done it this
way."
- Grace Hopper
On 5 April 2017 at 10:49, sum abiut <suab...@gmail.com> wrote:
> Hi,
>
> I am working on an leave management system and I am having a some
> difficulties trying to figure out how to accomplished this scenario.
>
> for example i have a table of.
>
> when a user apply for a leave i want to get the previous
> total_leave_balance of the applicant and minus his/her current num_days and
> assign the result to be the total_leave_balance. Please advise what would
> be the best way to approach this.
>
>
> *username* *first_name* *second_name* *num_days* *leave_entitlement*
> *beginning_bal* *Total_leave_balance*
> jtom james tom 3 12 23 20
> tjohn tom john 2 2 5 7
> atom anna tom 3 21 2
>
> jtom james tom 3 4 2
>
> atom anna tom 3 3 5
>
>
>
> cheers,
>
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