Admin page: how to calculate a parent Field after saving all tabular inlines

[Manuel Rocchetto]

Hi to all, 

i have an admin page PlayerAdmin with 3 different TabularInlines.

What i need is to calculate the value of a field in the Player model and save it, but for doing this i need information that are on the records of the TabularInlines, so i think that i have to save them too before this calculation.

Can someone tell me how to do it?

Thanks and best regards.

Manuel