How to inherit and add new state on a default module in odoo?

Question

i am using odoo 10. Here i want to add an extra state in purchase module.Current states are open,draft and done. I want to add another state named new. How can i achieve this?

Answer 1

Use selection_add attribute.

Try below code:

state = fields.Selecion(selection_add=[('new_state','New State')])

Hope this will help you.