convex-migration-helper

Convex schema migrations can run with zero downtime by widening the schema, backfilling data online, and eventually narrowing the schema to maintain data integrity while the app serves requests.

The best way to add a field to a Convex table is adding it as optional, backfilling existing documents with default values, and then narrowing the schema if strict validation is required.

Yes, online data backfills in Convex run while the application serves requests, allowing you to update existing documents safely without interrupting live traffic.

Splitting or merging Convex tables without breaking data requires a workflow of schema widening, online data transformation, and eventual schema narrowing to ensure data integrity.

Schema widening is needed when adding fields, creating tables, or transforming data in Convex, allowing the application to handle both old and new document shapes during the migration.

Online Convex migrations require careful schema widening and eventual narrowing to avoid data integrity issues, meaning you must manage both old and new document shapes during the transition.