import Callout from '@mdx/Callout.astro';

How to migrate to 0.21.0

1. Remove all :dialect prefixes from your drizzle-kit commands.

Example: Change drizzle-kit push:mysql to drizzle-kit push.

2. Update your drizzle.config.ts file:

• Add dialect to drizzle.config.ts. It is now mandatory and can be postgresql, mysql, or sqlite.
• Add driver to drizzle.config.ts ONLY if you are using aws-data-api, turso, d1-http(WIP), or expo. Otherwise, you can remove the driver from drizzle.config.ts.
• If you were using connectionString or uri in dbCredentials, you should now use url.

import { defineConfig } from "drizzle-kit"

export default defineConfig({
    dialect: "sqlite", // "postgresql" | "mysql"
    driver: "turso", // optional and used only if `aws-data-api`, `turso`, `d1-http`(WIP) or `expo` are used
    dbCredentials: {
        url: ""
    }
})

3. If you are using PostgreSQL or SQLite and had migrations generated in your project, please run drizzle-kit up so Drizzle can upgrade all the snapshots to version 6.

Changelog

❗ Snapshots Upgrade

All PostgreSQL and SQLite-generated snapshots will be upgraded to version 6. You will be prompted to upgrade them by running drizzle-kit up

❗ Removing :dialect from drizzle-kit cli commands

You can now just use commands, like:

• drizzle-kit generate
• drizzle-kit push
• etc.

without specifying dialect. This param is moved to drizzle.config.ts

❗ drizzle.config update

• dialect is now mandatory; specify which database dialect you are connecting to. Options include mysql, postgresql, or sqlite.
• driver has become optional and will have a specific driver, each with a different configuration of dbCredentials. Available drivers are:
  • aws-data-api
  • turso
  • d1-http - currently WIP
  • expo
• url - a unified parameter for the previously existing connectionString and uri.
• migrations - a new object parameter to specify a custom table and schema for the migrate command:
  • table - the custom table where drizzle will store migrations.
  • schema - the custom schema where drizzle will store migrations (Postgres only).

Usage examples for all new and updated commands

import { defineConfig } from "drizzle-kit"

export default defineConfig({
    dialect: "sqlite", // "postgresql" | "mysql"
    driver: "turso"
    dbCredentials: {
        url: ""
    },
    migration: {
        table: "migrations",
        schema: "public"
    }
})

Drizzle driver selection follows the current strategy:

If a driver is specified, use this driver for querying.

If no driver is specified:

• For postgresql dialect, Drizzle will:

  • Check if the pg driver is installed and use it.
  • If not, try to find the postgres driver and use it.
  • If still not found, try to find @vercel/postgres.
  • Then try @neondatabase/serverless.
  • If nothing is found, an error will be thrown.

• For mysql dialect, Drizzle will:

  • Check if the mysql2 driver is installed and use it.
  • If not, try to find @planetscale/database and use it.
  • If nothing is found, an error will be thrown.

• For sqlite dialect, Drizzle will:

  • Check if the @libsql/client driver is installed and use it.
  • If not, try to find better-sqlite3 and use it.
  • If nothing is found, an error will be thrown

❗ MySQL schemas/database are no longer supported by drizzle-kit

Drizzle Kit won't handle any schema changes for additional schemas/databases in your drizzle schema file

New Features

🎉 Pull relations

Drizzle will now pull relations from the database by extracting foreign key information and translating it into a relations object. You can view the relations.ts file in the out folder after introspection is complete

For more info about relations, please check the docs

🎉 Custom name for generated migrations

To specify a name for your migration you should use --name <name>

Usage

drizzle-kit generate --name init_db

🎉 New command migrate

You can now apply generated migrations to your database directly from drizzle-kit

Usage

drizzle-kit migrate

By default, drizzle-kit will store migration data entries in the __drizzle_migrations table and, in the case of PostgreSQL, in a drizzle schema. If you want to change this, you will need to specify the modifications in drizzle.config.ts.

import { defineConfig } from "drizzle-kit"

export default defineConfig({
    migrations: {
        table: "migrations",
        schema: "public"
    }
})