Code will associate a custom object to the contact associated to a deal.

associateCustomObjectToContact.js

// Import HubSpot Client Library and instantiate client with private app token
const hubspot = require('@hubspot/api-client');
const hubspotClient = new hubspot.Client({
    accessToken: process.env.HUBSPOTTOKEN // Access token associated with your private app (also be sure to include token in secrets)
});

// Helper function to get the associated Object ID of a specified Object Type
async function getAssociatedObjectId(objectType, objectId, toObjectType) {
    let obj = await hubspotClient.crm.objects.associationsApi.getAll(objectType, objectId, toObjectType);
    return obj.results[0].id;
}

// Helper function to associate a custom object to a contact
async function associateCustomObjectToContact(objectTypeId, customObjectId, contactId) {
    const AssociationSpec = [{
        "associationCategory": "USER_DEFINED",
        "associationTypeId": 33 // To get this value you need to make a GET request to https://api.hubapi.com/crm/v3/schemas/{objectTypeId}
    }];
    hubspotClient.apiRequest({
        method: 'PUT',
        path: `/crm/v4/objects/${objectTypeId}/${customObjectId}/associations/contact/${contactId}`,
        body: AssociationSpec
    })
}

exports.main = async (event) => {

    // Define variables
    const objectTypeId = '2-116144011'; // Custom Object "objectTypeId" (this will be different for you)
    const objectId = event.object.objectId // Currently enrolled Custom Object Record Id

    // Get associated Deal ID
    const dealId = await getAssociatedObjectId(objectTypeId, objectId, 'deal');
    console.log('DEAL ID: ' + dealId);

    // Get associated Deal Contact ID
    const contactId = await getAssociatedObjectId('deal', dealId, 'contact');
    console.log('Contact ID: ' + contactId);

    // Associate Object to Contact
    try {
        const apiResponse = await associateCustomObjectToContact(objectTypeId, objectId, contactId);
        console.log('SUCCESS: ' + JSON.stringify(apiResponse, null, 2));
    } catch (e) {
        e.message === 'HTTP request failed' ?
            console.error('ERROR: ' + JSON.stringify(e.response, null, 2)) : console.error('ERROR: ' + e)
    }
}

@jackcoldrick90 thanks a lot. This code worked very well.

@jackcoldrick90 Hi again. I have one last question, can this code work to custom objetcs to other custom objects?

Hi @MariaFernanda1997 no as it stands this code will only support custom objects being associated to contacts. If you want to refactor to support additional custom object types you would just need to update the helper function to associate with the object of choice.

Hi @jackcoldrick90 is this the helper function to update?

// Helper function to associate a custom object to a contact
async function associateCustomObjectToContact(objectTypeId, customObjectId, contactId) {
const AssociationSpec = [{
"associationCategory": "USER_DEFINED",
"associationTypeId": 33 // To get this value you need to make a GET request to https://api.hubapi.com/crm/v3/schemas/{objectTypeId}
}];
hubspotClient.apiRequest({
method: 'PUT',
path: /crm/v4/objects/${objectTypeId}/${customObjectId}/associations/contact/${contactId},
body: AssociationSpec
})
}

Correct, and you would need to update the "associationTypeId" and the path accordingly

Hi @jackcoldrick90 I´m sorry but I have two questions:

1. in this case whats the new path and body I have to send in order asocciate objects with objects please? I didn´t found a correct option for the path and body.
2. you also said: "If your deal has more than one contact you will need to make additional requests and modify" Could you post an example showing how to do it please?

Thanks a lot for your help

Hello @jackcoldrick90 ,

I have a somewhat different use case, but also linked to custom objects.

Our leads can come in via direct trial signup links or via partner trial signup urls. If a lead comes in via a partner signup link; we will capture the type of partner in a custom property on contact level & the specific partner ID.

For the contacts in HubSpot of which I have a value for the custom contact property ("partner_id"= contact property); I would like to associate these contacts the correct custom partner object (internal name for object is "referral_partner") by matching them based on the same custom partner ID object property("partner_id" = partner object property )

So I have a contact based workflow to enroll the contacts, but can't access the custom object from there. So I guess I'd have to create a workflow that starts from the custom object?
& then add a custom coded action that associates the contact to the partner; based on the partner_ID ?

Could you help me out with an adaptation of your code please? I have no idea where to start.

Hi @vdberghe-hanne - is the contact custom property "partner_id" a single line text field or a numeric field? As this will influence how we look up the correct partner object.

HI @jackcoldrick90 the contact property is a single line text property.
On the partner object, it's a numeric field.

But if need be, I can still adjust the property type (I only have 8 (test) contacts with a value for this currently)