Hello Community, 

I was creating a function 'onchange' wich must return the address of the selected partner,

I have this three fields : 

• 'client_id' : fields.many2one('res.partner', u'Client', change_default=True, required=True),
• 'client_address_id': fields.many2one('res.partner', u'Adresse du client', readonly=True),
• 'delivery_address_id': fields.many2one('res.partner', u'Adresse de livraison',readonly=True, help="La distance est calculée à partir de l'adresse de votre entreprise jusqu'à l'adresse de livraison du client. Google Map est utilisé pour calculer la distance."),  

 here is the function (*.py): 

def onchange_partner_id(self, cr, uid, ids, part, context=None):

if not part :

return{'value' :{'client_address_id':False, 'delivery_addres_id':False}}

partner=self.pool.get('res.partner').browse(cr, uid, part, context=context)

addr= self.pool.get('res_partner').address_get(cr, uid, [partner.id],['delivery', 'invoice', 'contact', 'default', 'other'])

val= {

'client_address_id':addr ['default'],

'delivery_addres_id':addr['delivery']

}

return {'value':val}

(*.xml):

<field name="client_id"  colspan="2"  on_change="onchange_partner_id(client_id, context)" attrs="{'readonly':[('state', '=', 'done')]}" 

context="{'show_address': 1, 'default_customer': False}"

                                            options='{"always_reload": True, "highlight_first_line": True}'/>

<field name="client_address_id" colspan="2"   attrs="{'readonly':[('state', '=', 'done')]}"/>

<field name="delivery_address_id" colspan="2"   attrs="{'readonly':[('state', '=', 'done')]}"/> 

After choosing the partner I got this error : 

addr= self.pool.get('res_partner').address_get(cr, uid, [partner.id],['delivery', 'invoice', 'contact', 'default', 'other']) AttributeError: 'NoneType' object has no attribute 'address_get'

The function address_get already exist ( for example they are using it  in the class 'sale_order' to do the same job) , so why it returns that error in the class that i have created? 

Help me please !!

Best resgards,