update-member groups being deleted

[Miles Wells]

I'm using the lists/update-member method to change the member's groups, but my API call wipes all groups and doesn't add the ones I want. I want it to replace the current groups, but I think my syntax may be wrong, though I do not get any error back. Here's the general shape of my JSON call: 

{

"apikey":"key",

"id":"listid",

"email":{

"email":"email_to_update"

},

"merge_vars": [{

"groupings":[{

"id":groupingid,

"name":"grouping_name",

"groups":["group_name"]

}]

}]

}

Any help would be appreciated!

[MailChimp Support]

Hello, Miles. You'll want to remove the brackets around the "merge_vars" section. It's not needed and can mess up the update, as demonstrated in the example subscribe call: http://apidocs.mailchimp.com/api/2.0/lists/subscribe.php

-- Anna

[Miles Wells]

Ah-hah! I thought it would be something that simple! Thanks!