CiviCRM Community Forums (archive)

In general, you might try passing in the string literal "null" or to an empty array. To set to an empty array, you probably need to change the form of the request to something like:

civicrm/extern/rest.php?entity=Activity&action=create&json={"id":"1234","assignee_contact_id":[]}

(ie The "json" parameter can be a json-encoded version of the API data. This allows you to set the field to something precise like 0, "", false, null, [], {}, etc.)

FWIW, the assignee_contact_id field is a "special" field that may have its own unique behavior, so it may not work the same way as other fields. One needs to test to see.

Hi, thanks for the replies! Unfortunately nothing is working. The client is custom built in Ruby.

If I pass null:
/civicrm/ajax/rest?entity=Activity&action=create&id=106684&assignee_contact_id=null&json=1&debug=1I receive:
"error_message":"Invalid  Contact Id"

If I pass an empty array:
/civicrm/ajax/rest?entity=Activity&action=create&id=106684&assignee_contact_id=[]&json=1&debug=1I receive:
"error_code":"syntax error"

If I pass these values in via the json param:
/civicrm/ajax/rest?entity=Activity&action=create&debug=1&json={"id":"106684","assignee_contact_id":[]}/civicrm/ajax/rest?entity=Activity&action=create&debug=1&json={"id":"106684","assignee_contact_id":"null"}/civicrm/ajax/rest?entity=Activity&action=create&debug=1&json={"id":"106684","assignee_contact_id":null}/civicrm/ajax/rest?entity=Activity&action=create&debug=1&json={"id":"106684","assignee_contact_id":false}/civicrm/ajax/rest?entity=Activity&action=create&debug=1&json={"id":"106684","assignee_contact_id":{}}etc.
I receive the exact same errors.

 

Thanks again for the help.

Err, the easiest is probably to create an api/v3/ActivityAssignment.php that contains the _create, _get and _delete functions needed (well, only civicrm_api3_activity_assigment_delete) and use this new api.

Check out Phone.php as an example, should work.

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