Question 1

Which SendGrid objects can a MongoDB model write to?

Accepted Answer

Marketing contacts, and a specific marketing list, which upserts the same contact records and adds them to that list. Polytomic can create a new list during setup. Campaigns, templates, transactional messages, suppressions and senders are not accepted. SendGrid is destination only, so it cannot act as a model source.

Question 2

Which identity fields are allowed?

Accepted Answer

Create or update only, and an identity is required, chosen from email, contact ID, external ID, anonymous ID or phone number ID. Polytomic sends these straight through SendGrid's asynchronous import upsert rather than querying SendGrid first to locate the record.

Question 3

How should I shape the model?

Accepted Answer

As a find query or pipeline producing one row per contact with the attributes already resolved. A MongoDB user document often carries preferences and history nested inside it, and SendGrid wants flat named fields, so the reshaping has to happen somewhere. The pipeline is the cheaper place to do it.

Question 4

Will contacts dropped from the collection disappear?

Accepted Answer

No. There is no delete, update only, append or replace mode, so a contact that disappears from your collection stays in SendGrid indefinitely. Suppression has to be handled on the SendGrid side or through a separate process of your own.

Question 5

Can the sync provision a custom field?

Accepted Answer

Yes, as text, number or date. Names cap at a hundred characters and allow only letters, digits and underscores, so a MongoDB field name containing a dot or a space needs aliasing in the model before SendGrid will take it.

Sync MongoDB to Twilio SendGrid

Sync MongoDB to Twilio SendGrid with Polytomic

Contacts and lists

Five identity options

No delete mode

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Step-by-step integration guide

Connect MongoDB in Polytomic

Connect Twilio SendGrid in Polytomic

Create a sync between MongoDB and Twilio SendGrid

Map fields and enable the sync

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