I want a popup when a user is saving for example a product. I tried to override the write method but it didn't work. So I'm returning a new action but it gets ignored. Any ideas on this ? 

write:

def write(self, vals):
    res = super(ProductTemplate, self).write(vals)
    if vals:
        # call popup window action:
        view_item = [(self.env.ref('versioning.versioning_text_wizard_view').id, 'form')]
        view = self.env.ref('versioning.versioning_text_wizard_view')
        return {
            'name': 'Versioning Text',
            'view_type': 'form',
            'view_mode': 'form',
            'view_id': view.id,
            'res_model': 'product.template',
            'views': view_item,
            'type': 'ir.actions.act_window',
            'target': 'new',
        }
    return res

Thank you