Im working on a django app, where i can create silos and their capacities e$.$g Wheat$-50$t$..$ The silos contain a unique grain$\_$type say wheat. A given grain type can exist in $1$ or more silos $($e$.$g $3$ silos of $50$t containing wheat$).$ during brewing, i draw grain from the silos for example if i want to use $10$t of wheat, i just update brewing logs by selecting the grain type and what has been used.

When i need to draw from a given silo and there isnt enough quantity, draw what is left and pick the rest from another silo with the same grain type.

notify if qty is below $50\%.$

I used the code below to show $\%$ using the bootstrap progress bar in the silo grain card

def index$($request$)$:

silos $=$ Silo.objects.all$()$

for silo in silos:

silo.percentage $=($silo$.$quantity $/$ silo.capacity$)*100$ if silo.capacity $!=0$ else $0$

return render$($request$,$ 'brewing$/$index$.$html$\text{'},\{\text{'}$silos$\text{'}$: silos$\})$

I used colors to differentiate the $10$t$,40$t$,$ and $50$t capacity silos on the frontend as seen below.