Add 1:N relationship Custom Object via REST API

Question

Hi allI'm trying to add 1:N relationship custom objects to the lead via REST API Create/Update/Upsert Custom Objects » Marketo Developers .But API response is {"code":"1017","message":"Record already exists"}.How can I add 1:N objects to a lead?Request999-XXX-999.mktorest.com/rest/v1/customobjects/rireki.json?access_token=xxxxxxxxxxxxxxxxxxxxxxxxxx{   "action":"createOnly",   "input":[      {         "id":1011725,         "datetime":"2015-11-16T12:34:56+09:00",         "count":3,      }   ]}Response{"requestId":"12579#1511345606b","result":[{"seq":0,"status":"skipped","reasons":[{"code":"1017","message":"Record already exists"}]}],"success":true}

Grégoire_Miche2 · Accepted Answer

Hi Takehiro Masaki,When setting up custom object, you need to specify what field links to the lead (Data type = Link), then you will specify to which lead or company field it is linked). Typically, you will link to the Lead.id or Lead.email address fields. I gather in this case it's the ID field.Furthermore, you may specify what field is a Unique ID for the custom object. Set any field Type as you want, and then use the "Dedupe field" toggle to set this field as a unique ID. This allows Marketo to distinguish between the records you are inserting. In your case, do you have a deduplicate field?And then, when you create the custom object through the API, these 2 fields will have to be provided.Here, in your import, I do not see what is the link field and the Unique ID field. Please provide a screenshot of the Field definition for your custom object so that can help you further.-Greg

Kenny_Elkington · Answer

Two things here. createOnly will not create a record if there is already a record matching your key, you need to have a net new unique identifier for createOnly mode. Second it's not clear what key type that you're trying to specify here, so your call may be ambiguous.

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