A onchange method that try to modify the inherited domain and presents me the following error, this is the code I'm using and the new api..

File "/usr/lib/python2.7/dist-packages/psycopg2/extensions.py", line 129, in getquoted 

pobjs = [adapt(o) for o in self._seq]

ProgrammingError: can't adapt type 'account.journal'

@api.multi
def onchange_company_id(self, company_id, part_id, type, invoice_line, currency_id):
        result = super(account_invoice, self).onchange_company_id(company_id, part_id, type, invoice_line, currency_id)

        obj_jrnl = self.env['account.journal']
        jrnl_ids = result['domain']['journal_id']
        jrd = []

        for jrnl_id in jrnl_ids:
            for lst in jrnl_id[2]:
                jrnl = obj_jrnl.search([('id','=',lst)])
                for rec_jrnl in obj_jrnl.browse(jrnl):
                    if type in ('out_invoice', 'in_invoice'):
                        if rec_jrnl.type_doc.main_doc:                  # <-- Line Error
                            jrd.append(lst)
                    else:
                        if not rec_jrnl.cat_doc.void:             
                            jrd.append(lst)
            if jrd:
                result['value'] = {'journal_id': jrd[0]}
                result['domain'] = {'journal_id':  [('id', 'in', jrd)]}
                
        return result

The field is many2one type_doc to another table and main_doc is a boolean field, this method works flawlessly in 6.1 and 7.0