generate

Generate a new migration that represents the difference between your current schema and the last recorded state. Each migration includes a forward (up.ts) and a rollback (down.ts) file, so changes can be applied and reverted reliably.

Usage

npm

npx durcno generate [--config path/to/durcno.config.ts]

pnpm

pnpm dlx durcno generate [--config path/to/durcno.config.ts]

Bun

bun x durcno generate [--config path/to/durcno.config.ts]

Yarn

yarn dlx durcno generate [--config path/to/durcno.config.ts]

Common options

• --config <path> — Path to config file (defaults to durcno.config.ts).

What it produces

After running the command you should see a new folder in your configured out directory (commonly migrations/) that contains:

• up.ts — exports DDL statements to apply the migration
• down.ts — exports DDL statements to roll back the migration

Example

1. Update your schema in db/schema.ts (add or change tables/columns).
2. Run:

npm

npx durcno generate

pnpm

pnpm dlx durcno generate

Bun

bun x durcno generate

Yarn

yarn dlx durcno generate

3. Review the generated up.ts and down.ts in the new migration folder. Edit the generated DDL statements if you need to tweak or add data migrations.

Tips

• Review up.ts and down.ts carefully before applying to production.
• If a generated migration contains undesired changes, adjust the DDL statements or fix your schema and re-run generate.

Next: apply the migration with npx durcno migrate.