Theo's Typesafe Cult•10mo ago

Drizzle / PlanetScale Table Relations

Does anyone possibly have a link to a repo I can take a look at to see how relations are setup with Drizzle ORM and PlanetScale as the database?

7 Replies

Sturlen•10mo ago

the examples in the docs work with Planetscale: https://orm.drizzle.team/docs/rqb#declaring-relations

Drizzle Queries - DrizzleORM

Drizzle ORM | %s

dollahane23033•10mo ago

Yes I've been through those, I also checked out this article. https://planetscale.com/blog/working-with-related-data-using-drizzle-and-planetscale

Emulating foreign key constraints with Drizzle relationships | Plan...

Learn how to build virtual relationships between tables in PlanetScale while using the Drizzle TypeScript ORM.

dollahane23033•10mo ago

For testing purposes I copied the schema from this article and still got the fk constraint error. The tables were created to the db though, I havnt tried actually writting to it yet. Maybe it actually works. Just wanted to see how others have done theirs. I also found this somewhere in the docs "export const db = drizzle(connection, { schema, mode: 'planetscale' });"

Sturlen•10mo ago

here's the config that I use for Planetscale and relations

// drizzle.config.ts
import type { Config } from "drizzle-kit";

export default {
  schema: "./src/server/schema.ts",
  out: "./drizzle",
  driver: "mysql2",
  dbCredentials: {
    connectionString,
  },
} satisfies Config;

// drizzle.config.ts
import type { Config } from "drizzle-kit";

export default {
  schema: "./src/server/schema.ts",
  out: "./drizzle",
  driver: "mysql2",
  dbCredentials: {
    connectionString,
  },
} satisfies Config;

here's the table I use for users in a project, where users can have many pets. the important is that you can't specify any foreign keys directly in the table, only through seperate relations

export const users = mysqlTable(
  "users",
  {
    id: varchar("id", { length: 24 }).primaryKey(), //cuid2
    username: varchar("username", { length: 256 }).unique().notNull(),
    password_hash: varchar("password_hash", { length: 256 }).notNull(),
    created_at: timestamp("created_at").defaultNow().notNull(),
  },
  (users) => ({
    nameIndex: uniqueIndex("name_idx").on(users.username),
  })
);

export const usersRelations = relations(users, ({ many }) => ({
  pets: many(pets),
}));

export const users = mysqlTable(
  "users",
  {
    id: varchar("id", { length: 24 }).primaryKey(), //cuid2
    username: varchar("username", { length: 256 }).unique().notNull(),
    password_hash: varchar("password_hash", { length: 256 }).notNull(),
    created_at: timestamp("created_at").defaultNow().notNull(),
  },
  (users) => ({
    nameIndex: uniqueIndex("name_idx").on(users.username),
  })
);

export const usersRelations = relations(users, ({ many }) => ({
  pets: many(pets),
}));

Rhys•10mo ago

https://github.com/AnswerOverflow/AnswerOverflow/blob/main/packages/db/src/schema.ts I just moved @Answer Overflow over to drizzle yesterday, here’s our schema file

GitHub

AnswerOverflow/packages/db/src/schema.ts at main · AnswerOverflow/A...

Indexing Discord Help Channel Questions into Google - AnswerOverflow/AnswerOverflow

dollahane23033•10mo ago

Thanks guys! 🙏

Rhys•10mo ago

Mark your question as solved t3ggSip

https://discord.com/channels/966627436387266600/1150781968552824924/1150781974768787466

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Drizzle / PlanetScale Table Relations