OSV method's return statement
odoo, python
Solution
The returned dictionary is interpreted as an action (`ir.actions.act_window` model), such as the ones found on XML views. The documentation is available in the Technical Memento and in the official docs.
Problem
In OpenERP, an OSV object can return something which can open a new view or activate an action. For instance, `sale.order` has `manual_invoice` method which returns the following: ``` return { 'name': _('Customer Invoices'), 'view_type': 'form', 'view_mode': 'form', 'view_id': [res_id], 'res_model': 'account.invoice', 'context': "{'type':'out_invoice'}", 'type': 'ir.actions.act_window', 'nodestroy': True, 'target': 'current', 'res_id': inv_ids and inv_ids[0] or False, } ``` and it opens an invoice form view in the same window. I've seen `'view_id': [res_id],` being changed to `'views': [(id2, 'form')],` and other parts also modified, and it still works. So what I don't understand is how does this mechanism works. What determines which values in a return dict should be included? How can I know which ones are mandatory and which are not? Many thanks!