Drizzle Team•11mo ago

How to Squash Migrations?

Squashing Migrations is a time-honored practice in many ORM-adjacent systems. Examples could be on Django SO in 2016, 2017, 2020, or even the official documentation, and similar tooling in other language ecosystems, e.g. Ruby's squasher. I can't find anything about it for DrizzleKit. Has anyone done this? Is there a blog post I missed?

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2 Replies

Peter BolingOP•11mo ago

Indeed, searching this discord for "squash" has zero hits 🥹

Peter BolingOP•11mo ago

✨ Solution! ✨ My scripts:

    "scripts": {
        "db:setup": "tsx src/lib/db/setup.server.ts",
        "db:studio": "drizzle-kit studio --config drizzle.config.ts",
        "db:generate": "drizzle-kit generate:pg --config drizzle.config.ts",
        "db:migrate": "drizzle-kit push:pg --config drizzle.config.ts",
        "db:squash": "rm -rf migrations/* && pnpm db:setup && pnpm db:generate && pnpm db:migrate",
        "setup": "pnpm db:setup && pnpm db:migrate",

    "scripts": {
        "db:setup": "tsx src/lib/db/setup.server.ts",
        "db:studio": "drizzle-kit studio --config drizzle.config.ts",
        "db:generate": "drizzle-kit generate:pg --config drizzle.config.ts",
        "db:migrate": "drizzle-kit push:pg --config drizzle.config.ts",
        "db:squash": "rm -rf migrations/* && pnpm db:setup && pnpm db:generate && pnpm db:migrate",
        "setup": "pnpm db:setup && pnpm db:migrate",

My src/lib/db/setup.server.ts is in this gist: https://gist.github.com/pboling/f831235a1f3c5627f0341c4bbcf37ea9#file-setup-server-ts

Gist

Squash PostgreSQL Migrations with drizzle-kit and pgtools

Squash PostgreSQL Migrations with drizzle-kit and pgtools - setup.server.ts

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How to Squash Migrations?