DrizzleTypeError<"Seems like the schema generic is missing - did you forget to add it to your DB typ

Hello, I'm new to this. I'm using mysql + drizzle-orm + typescript in nextjs. I use next.js boilerplate when I use this

db.query.books.findFirst....

db.query.books.findFirst....

ide/typescript will show error like this for books

DrizzleTypeError<"Seems like the schema generic is missing - did you forget to add it to your DB type?">

DrizzleTypeError<"Seems like the schema generic is missing - did you forget to add it to your DB type?">

for more detail, I create an issue here: https://github.com/drizzle-team/drizzle-orm/issues/2738

8 Replies

sayutoOP•4mo ago

singgih•4mo ago

try to add typeof you schema.

import * as yourSchema from './path-your-schema'
const db = drizze<typeof yourSchema>()

import * as yourSchema from './path-your-schema'
const db = drizze<typeof yourSchema>()

sayutoOP•4mo ago

@singgih I was defined types like this

import type { MySqlDatabase } from 'drizzle-orm/mysql-core';
import { drizzle as drizzleMysql } from 'drizzle-orm/mysql2';
import { migrate as migrateMysql } from 'drizzle-orm/mysql2/migrator';
import { createConnection } from 'mysql2';
import { PHASE_PRODUCTION_BUILD } from 'next/dist/shared/lib/constants';

import * as schema from '@/models';

import { Env } from './Env';

let connection;
let drizzle: MySqlDatabase<any, any, any>;

if (
  process.env.NEXT_PHASE !== PHASE_PRODUCTION_BUILD &&
  process.env.NODE_ENV === 'production' &&
  Env.DATABASE_URL
) {
  connection = await createConnection({
    uri: Env.DATABASE_URL,
  });

  drizzle = drizzleMysql(connection, { schema, mode: 'default' });

  await migrateMysql(drizzle, { migrationsFolder: './migrations' });
} else {
  const global = globalThis as unknown as { connection: any };

  if (!global.connection) {
    global.connection = await createConnection({
      ...
    });
  }

  drizzle = drizzleMysql(global.connection, { schema, mode: 'default' });
  await migrateMysql(drizzle, { migrationsFolder: './migrations' });
}

export const db = drizzle;

import type { MySqlDatabase } from 'drizzle-orm/mysql-core';
import { drizzle as drizzleMysql } from 'drizzle-orm/mysql2';
import { migrate as migrateMysql } from 'drizzle-orm/mysql2/migrator';
import { createConnection } from 'mysql2';
import { PHASE_PRODUCTION_BUILD } from 'next/dist/shared/lib/constants';

import * as schema from '@/models';

import { Env } from './Env';

let connection;
let drizzle: MySqlDatabase<any, any, any>;

if (
  process.env.NEXT_PHASE !== PHASE_PRODUCTION_BUILD &&
  process.env.NODE_ENV === 'production' &&
  Env.DATABASE_URL
) {
  connection = await createConnection({
    uri: Env.DATABASE_URL,
  });

  drizzle = drizzleMysql(connection, { schema, mode: 'default' });

  await migrateMysql(drizzle, { migrationsFolder: './migrations' });
} else {
  const global = globalThis as unknown as { connection: any };

  if (!global.connection) {
    global.connection = await createConnection({
      ...
    });
  }

  drizzle = drizzleMysql(global.connection, { schema, mode: 'default' });
  await migrateMysql(drizzle, { migrationsFolder: './migrations' });
}

export const db = drizzle;

Mario564•4mo ago

Try this:

let drizzle: MySqlDatabase<any, any, typeof schema>;

let drizzle: MySqlDatabase<any, any, typeof schema>;

sayutoOP•4mo ago

@Mario564 thank you, you save my project 🤝

Dane•4mo ago

This doesn't seem to work with the planetscale-serverless driver

Mario564•4mo ago

@dane.stevens The driver shouldn't affect the type of of the query builder. Can you share your setup file to see what could be wrong?

Dane•4mo ago

https://discord.com/channels/1043890932593987624/1271174535617708125/1271174535617708125

Gaming

Programming

DrizzleTypeError<"Seems like the schema generic is missing - did you forget to add it to your DB typ