DT
Drizzle Team•7mo ago
sayuto

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
No description
8 Replies
sayuto
sayutoOP•7mo ago
up
singgih
singgih•7mo 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>()
sayuto
sayutoOP•7mo 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
Mario564•7mo ago
Try this: 
let drizzle: MySqlDatabase<any, any, typeof schema>;
let drizzle: MySqlDatabase<any, any, typeof schema>;
sayuto
sayutoOP•7mo ago
@Mario564 thank you, you save my project 🤝
Dane
Dane•7mo ago
This doesn't seem to work with the planetscale-serverless driver
Mario564
Mario564•7mo 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
Dane•7mo ago

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