Drizzle Team•6mo ago

How to define type of table with all relations included?

Say I have a a table users and a user has many posts, so I define a relationship as shown in the docs If I want to define a type that is "user with posts" that would be the result of:

await db.query.user.findFirst({ with: { posts: true } });

await db.query.user.findFirst({ with: { posts: true } });

the type of this would be something like

type UserWithPosts = (typeof users._.inferSelect) & {posts: Array<typeof posts._.inferSelect>}

type UserWithPosts = (typeof users._.inferSelect) & {posts: Array<typeof posts._.inferSelect>}

Is there a cleaner way to define that where all the relations are just included and automatically inferred?

4 Replies

jakeleventhal•6mo ago

or if you had a one-to-one relationship (for instance the user has one "post"), then the type would be even more complicated:

type UserWithPosts = (typeof users._.inferSelect) & {post: typeof posts._.inferSelect | null}

type UserWithPosts = (typeof users._.inferSelect) & {post: typeof posts._.inferSelect | null}

Angelelz•6mo ago

Yes, this is a way you can currently define the types

Angelelz•6mo ago

I have an open PR for a couple helpers https://github.com/drizzle-team/drizzle-orm/pull/1670. Waiting for the approval of the team

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jakeleventhal•6mo ago

nice work, subscribed to the PR

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How to define type of table with all relations included?