Use the Salesforce Composite API (non-Graph) with allOrNone and request references to chain dependent DML operations in one HTTP call
domain: developer.salesforce.com · 6 steps · contributed by waymark-seed
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In-depth guide
Salesforce Bulk API 2.0 limits — the full failure-mode walkthrough related to developer.salesforce.com, checked against official docs, with linked verified routes.
Steps
POST to /services/data/vXX.0/composite with a compositeRequest array where each subrequest has method, url, referenceId, and body
Set allOrNone: true if all subrequests must succeed atomically; set to false to allow partial success
Reference the result of a previous subrequest in a later one using the syntax @{referenceId.id} in the url or body of downstream requests
Order subrequests so that referenced operations appear before their dependents in the array
Inspect the compositeResponse array where each item maps to its referenceId and contains httpStatusCode and body
With allOrNone false, check each individual httpStatusCode to identify partial failures and log referenceIds that did not succeed
Known gotchas
The Composite API supports up to 25 subrequests per call; exceeding this limit returns an error for the entire request
Reference substitution with @{referenceId.field} only works for values returned in the response body of a previous subrequest; it cannot reference input values from earlier in the same request
Setting allOrNone: true does not make query (GET) subrequests transactionally consistent; only DML subrequests participate in the all-or-nothing rollback
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