Typeerror(repr(o) + " Is Not Json Serializable") - Odoo V8

I have this method, which calls for a document associated with an invoice on Odoo v8. @api.multi def button_generate_wh_doc(self): context = self._context partner = self.env['res.p

Solution 1:

The domain you passing in res has to be list of tuple and not list of tuple of string, check below code :

@api.multi
def button_generate_wh_doc(self):
    context = self._context
    partner = self.env['res.partner']
    res = {}
    for inv in self:
        view_id = self.env['ir.ui.view'].search([
            ('name', '=', 'account.invoice.wh.iva.customer')])
        context = self.env.context.copy()
        context.update({
            'domain':[
                ('invoice_id','=',inv.id),
                ('type','=',inv.type),
                ('default_partner_id','=', partner._find_accounting_partner(inv.partner_id).id),
                ('default_name' ,'=', inv.name or inv.number),
                ('view_id' ,'=', view_id[0].id)
            ]
        })
    return {
        'name': _('Withholding vat customer'),
        'type': 'ir.actions.act_window',
        'res_model': 'account.wh.iva',
        'view_type': 'form',
        'view_id': False,
        'view_mode': 'form',
        'target': 'current',
        'domain': [('type', '=', inv.type )],
        'context': context,
    }