gh-marcioaltoe-claude-craftkit-plugins-db-tools/commands/generate-migration.md

description

description
Generate a Drizzle migration from schema changes

Generate Database Migration

Generate a new Drizzle migration file based on schema changes.

Instructions

1. Check if drizzle-kit is configured (look for drizzle.config.ts)
2. If not configured, offer to create the config file with proper Postgres settings
3. Run the migration generation command:
   • bunx drizzle-kit generate:pg or bun run db:generate
4. Review the generated migration file in the migrations directory
5. Remind the user to:
   • Review the migration SQL before applying
   • Run bun run db:push or the migration apply command
   • Update the database

Drizzle Config Example

import type { Config } from 'drizzle-kit'

export default {
  schema: './src/db/schema/*',
  out: './drizzle',
  driver: 'pg',
  dbCredentials: {
    connectionString: process.env.DATABASE_URL!,
  },
} satisfies Config

Safety Checks

• Warn if migration includes destructive operations (DROP, ALTER with data loss)
• Suggest backing up production databases before applying
• Check for proper environment variable configuration