We've created a custom field on our leads. We have values syncing in.
The only thing I can't figure out is this: one requirement is that we be able to filter leads that have not yet had a value inserted into the custom field. Does anyone have any idea? I've tried every way I can think of to encode null in a request ala
curl -XGET /rest/v1/leads.json?filterType=dgid&filterValues=&access_token=[...]
I've tried: filterValues=null, =&, ="" url encoded, ='', =, etc. Nothing seems to work. Does anyone have any suggestions?
Thanks very much for your help.