Migration Helper

Convex Migration Helper

Safely migrate Convex schemas and data when making breaking changes.

When to Use

• Adding new required fields to existing tables
• Changing field types or structure
• Splitting or merging tables
• Renaming fields
• Migrating from nested to relational data

Migration Principles

1. No Automatic Migrations: Convex doesn't automatically migrate data
2. Additive Changes are Safe: Adding optional fields or new tables is safe
3. Breaking Changes Need Code: Required fields, type changes need migration code
4. Zero-Downtime: Write migrations to keep app running during migration

Safe Changes (No Migration Needed)

Adding Optional Field