I'm new to the Odoo api, and trying to figure out how to get some fields is quite hard.

What I want to find is for example the 'payment_method_id'. In a sale.order it looks like, 'payment_method_id': [3,'adyen_eur']. But I only have the 'adyen_eur' part of the payment_method_id, so to get the int 3 I have to 'search_read' some database, but which one?

To make it a bit more clear I do the same for 'country_id'. What I have is:

country_code = 'GB'

To get the country_id I do:

country_id = models.execute_kw(db, uid, password, 'res.country', 'search_read',[[('code','=',country_code)]])[0]

The integer that comes out of the country_id is what I need. In the same way I want to get the payment_method_id and workflow_process_id. Is there a database like 'res.country', 'order.sales' ,... where I can find these Id's?