Hello

  I have a function field that returns a string.  The string is supposed to be a url pointing to a pdf file on the server.  I have the function created and I know that the correct url is getting generated.  The problem is that string is not showing correctly on the view.

The field on the view is using a 'url' widget so that it becomes a hyperlink that can be clicked

The link looks like this right now:  http://[object Object]

I would like it to show something like this:  http://127.0.01/document_folder/some_pdf_file.pdf

Here is my python function:

def _append_inv_url_2_uuid(self, cr, uid, ids, field, args, context=None):
        res = {}
        for rec in self.browse(cr, uid, ids, context):
            # look up the invoice url by the key name instead of the value.
            # this way if the value changes then no changes will have to be made here
            def_url_id = self.pool.get('ir.config_parameter').search(cr, uid, [('key','=','Invoice uuid URL')])[0]
            
            # get the value of the url key
            url_str = self.pool.get('ir.config_parameter').browse(cr, uid, def_url_id).value

            # get the uuid from the sale order
            uuid = "so?id=%s" % self.browse(cr, uid, ids[0]).uuid

            whole_string = "%s%s" % (url_str, uuid)
            
            res.update({rec.id: {'invoice_url': str(whole_string)}})
        return res

Here is the field in the form view:   <field name="invoice_url" widget="url" />