validation of admin form with inlines

[Roberto Russi]

I need to validate a form in the admin area checking if the SUM of 'price' field in inlines match whit 'amount' field in the main form.

What is best way?  

[ludovic coues]

I would hide or make the amount field read-only and set it with a
pre_save signals.
This way, you don't have to worry about it and you get the right value
every time instead of getting an error every now and then.

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Cordialement, Coues Ludovic
+336 148 743 42