Mapping and querying Custom Objects for a Contact with REST Api

Question

Hello All,
We are hoping to get some details on managing DataCard set through REST APIs. Our implementation goal is to create Contacts and add Custom object for each Contact, or to be precise, add a DataCard Set for each Contact.
At the moment, to associate a DataCard Set (or Custom Object) to an existing contact, we are supplying following custom object fields during creation of Custom Object:
new CustomObjectField 
                                                                name = "MappedEntityType",
                                                                dataType = Enum.GetName(typeof(DataType), DataType.numeric),
                                                                type = "CustomObjectField",
                                                                defaultValue = "0"
                                                         new CustomObjectField
                                                                name = "MappedEntityID",
                                                                dataType = Enum.GetName(typeof(DataType), DataType.numeric),
                                                                type = "CustomObjectField",
                                                                defaultValue = "<ContactId>"
Is this the correct approach? This is Based on the information provided here: http://topliners.eloqua.com/community/code_it/blog/2012/05/31/eloqua-api-how-to-mapping-a-data-card-to-an-entity.
Would the REST API allow us to query the CustomObjects using the MappedEntityId value for later updates? If so, any pointers on how we approach that?
Thanks in ad.

Answer 1

Either the MappedEntityID field is not available or I do it wrong, Eloqua is ignoring the field and does not map the custom record with the unique Contact ID
{"type":"CustomObjectData","ContactID":"8829509","fieldValues":[{"id":"195","value":"[email protected]"},{"id":"220","value":"a0KJ000000387QvMAI"},{"id":"191","value":"001J000001OrL77IAF"},{"id":"193","value":"NowTV MPP"},{"id":"194","value":"8829509"},{"id":"196","value":"Andreas"},{"id":"197","value":"Wolf"},{"id":"198","value":"003J00000145lkBIAQ"},{"id":"210","value":"777666555"},{"id":"199","value":"gbp"},{"id":"200","value":"0"},{"id":"215","value":"0"},{"id":"201","value":"999111999"},{"id":"214","value":"111111"},{"id":"202","value":"222222"},{"id":"204","value":"now"},{"id":"203","value":"xmas"},{"id":"205","value":"no description"},{"id":"206","value":"test"},{"id":"218","value":"holidays"},{"id":"219","value":"PPV-0878545"},{"id":"213","value":"N"},{"id":"212","value":"myself"},{"id":"209","value":"now tv"},{"id":"192","value":"1417542120"},{"id":"207","value":"1417542120"},{"id":"216","value":"1417542240"},{"id":"217","value":"1417542240"},{"id":"211","value":"1417542240"}]},"MappedEntityID":"003J00000145lkBIAQ"}
Response
DEBUG|Response------{"type":"CustomObjectData","id":"81720","fieldValues":[{"id":"195","value":"[email protected]"},{"id":"220","value":"a0KJ000000387QvMAI"},{"id":"191","value":"001J000001OrL77IAF"},{"id":"193","value":"NowTV MPP"},{"id":"194","value":"8829509"},{"id":"196","value":"Andreas"},{"id":"197","value":"Wolf"},{"id":"198","value":"003J00000145lkBIAQ"},{"id":"210","value":"777666555"},{"id":"199","value":"gbp"},{"id":"200","value":"0"},{"id":"215","value":"0"},{"id":"201","value":"999111999"},{"id":"214","value":"111111"},{"id":"202","value":"222222"},{"id":"204","value":"now"},{"id":"203","value":"xmas"},{"id":"205","value":"no description"},{"id":"206","value":"test"},{"id":"218","value":"holidays"},{"id":"219","value":"PPV-0878545"},{"id":"213","value":"N"},{"id":"212","value":"myself"},{"id":"209","value":"now tv"},{"id":"192","value":"1417542120"},{"id":"207","value":"1417542120"},{"id":"216","value":"1417542240"},{"id":"217","value":"1417542240"},{"id":"211","value":"1417542240"}]}
Eloqua:
Name: PPV-0878545
Unique Code: a0KJ000000387QvMAI
Status Registered
Created Date 12/22/2014 12:44:49 PM
Mapped NO
Any Idea how to map this to a contact
Entity Type is Contacts
Entity Field is SFDC Contact ID