Hello Everyone,

I am customising in purchase order workflow.

i have added three new states in existing states.

i am done with everything but there is "READONLY_STATES" dictionary is declared for make fields readonly in particular states.

READONLY_STATES = {
'purchase': [('readonly', True)],
'done': [('readonly', True)],
'cancel': [('readonly', True)],
} 

for that i write following code.

class PurchaseOrder(models.Model):
        _inherit = "purchase.order"
         READONLY_STATES = {
                    'open': [('readonly', True)],
                    'partial received': [('readonly', True)],
                    'received': [('readonly', True)],
                    'purchase': [('readonly', True)],
                    'done': [('readonly', True)],
                    'cancel': [('readonly', True)],
             }

but its not work.

I tried inherit it by importing class also but that is also not work.