Drizzle Team•16mo ago

Code generated value

I'm using SQLite. How can I create a custom type with an auto-generated value which is generated in code and not the database? I managed to get it to work, but I have to pass a blank value for the field whenever creating records otherwise I get a type error, and I'm having trouble finding the right combination of options.

import {customType, sqliteTable } from "drizzle-orm/sqlite-core";
import { createId } from "@paralleldrive/cuid2";

const cuid2 = customType<{ data: string; notNull: true }>({
  dataType() { return "text"; },
  toDriver(): string { return createId(); },
});

const users = sqliteTable("users",
  { id: cuid2("id").primaryKey() }
);

db.insert(users).values({id: ""}).run();

import {customType, sqliteTable } from "drizzle-orm/sqlite-core";
import { createId } from "@paralleldrive/cuid2";

const cuid2 = customType<{ data: string; notNull: true }>({
  dataType() { return "text"; },
  toDriver(): string { return createId(); },
});

const users = sqliteTable("users",
  { id: cuid2("id").primaryKey() }
);

db.insert(users).values({id: ""}).run();

If {id: ""} is left out of values, TypeScript complains: "property id is missing. On the other hand, setting a default or using default: true as configuration resolves the TypeScript error, but inserting records fails with a runtime error: UNIQUE constraint failed: users.id. Is there a better way that allows omitting the field on insert, does not result in a type error, and safely and reliably generates an value?

2 Replies

Andrii Sherman•16mo ago

I see you have notNull: true in types for customType

tacomanator•16mo ago

@Andrii Sherman because I want the generated database column to be not null

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Code generated value