Observed Signal · Aug 21, 2026 · Technical Release · Source: DEV Community · Impact: 2/5 · Sentiment: Positive
Atomicity fix for Formbricks AI demo
An open-source contributor found a bug in Formbricks' AI example-response generator where a mid-batch failure left partially committed synthetic survey data, preventing retries. The author reproduced the failure deterministically, implemented a transactional patch using Prisma transactions and a PostgreSQL FOR NO KEY UPDATE lock, and added tests to ensure generated batches either fully commit or fully roll back for the tested failure modes. The model call remains outside the transaction; state is revalidated and a narrow persistence context is used before committing. The upstream issue remained open and the proposed fix lives in the author's fork as of 2026-08-21.
Reliable atomic persistence in an open-source survey platform matters to CX/VoC tooling and B2B SaaS reliability, but the change is an implementation-level fix with limited industry-wide impact.
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Key Takeaways & Evidence Grounding
- Formbricks is an open-source experience-management platform that can generate example survey responses for demo purposes.
- A bug allowed partial database commits during example-response generation: some Responses, Displays and Tag links could persist even when the overall operation failed.
- The author reproduced the failure deterministically and implemented a patch that uses a single Prisma transaction, acquires a PostgreSQL FOR NO KEY UPDATE lock, revalidates state, and persists the entire synthetic batch through the same transaction client.
- The patch keeps the external model request outside the transaction, revalidates survey/workspace/organization state after generation, and enforces strict propagation for quota-link failures (e.g., P2003) within the example-response context.
- As of 2026-08-21 the upstream Formbricks issue (#8722) remained open and the candidate pull request was in the author's fork, not merged upstream.
Connected Companies & Entities
1 Entity mapped“Then I constrained Prisma to one database connection.”
Ontology Mapping & Concepts
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