Best way to inherit states parameter of field

Question

I have requirement of modifying sale order workflow. I have added extras state in sale.order class. I want fields to be editable in form on those states. Following is the way we put states parameter in field.
states={'draft': [('readonly', False)], 'sent': [('readonly', False)],'newstate1' : [('readonly', False)]}
I don't want to override existing fields. Is there any way I can apply states to all fields or selected fields in a class?

Thanks

Vasanth · Answer

you can change it in the xml view itself by using attributes: For example: {'readonly':['('state',' in',['draft','sent','newstate1']}

Deepa Venkatesh · Answer

Use ORM method "fields_get"
In that you can change/set the property of a field... Try it out, It worked for me..
Refer in standard objects, like account_payment, res_bank etc, in which they have used it to customize the property of fields..

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