Dynamically modifying a form widget in Django -

my django app uses django suit tool theme admin app of django. 1 of things suit can append , prepend elements form widgets like:

class propertyform(modelform):     class meta:         model = property         widgets = {             'amount': enclosedinput(prepend = "gbp"),         } 

the effect is:

although nice feature more useful if add dynamically (in pseudo code):

'amount': enclosedinput(prepend = my_model_instance.currency) 

i tried override form's init so:

class propertyform(modelform):      def __init__(self, *args, **kwargs):         inst = kwargs["instance"]         self._meta.widgets["amount"] = enclosedinput(prepend = inst.currency)         super(propertyform, self).__init__(*args, **kwargs) 

strangely works when put breakpoint in init method. looks there's timing issue involved.

so question best way (if 1 @ available) implement this?

the problem with:

self._meta.widgets["amount"] = enclosedinput(prepend = inst.currency) 

it turns out _meta being cached. when change above line (which nicer solution _meta private):

self.fields['amount'].widget = enclosedinput(prepend = inst.currency) 

...it works flawlessly