db.query throwing undefined is not an object (evaluating 'relation.referencedTable')

Hi, so i have this schema called product.ts

import { pgTable, timestamp, uuid, varchar } from "drizzle-orm/pg-core";
import { categories } from "./category";
import { relations } from "drizzle-orm";

export const products = pgTable("products", {
    id: uuid("id").primaryKey().defaultRandom(),
    name: varchar("name", { length: 255 }),
    categoryId: uuid("category_id").notNull().references(() => categories.id),
    createdAt: timestamp("created_at").notNull().defaultNow(),
    updatedAt: timestamp("updated_at").defaultNow(),
    deletedAt: timestamp("deleted_at"),
})

export const productsRelations = relations(products, ({ one }) => ({
    category: one(categories,{
        fields: [products.categoryId],
        references: [categories.id],
    })
}))

export type Product = typeof products.$inferSelect
export type NewProduct = typeof products.$inferInsert

import { pgTable, timestamp, uuid, varchar } from "drizzle-orm/pg-core";
import { categories } from "./category";
import { relations } from "drizzle-orm";

export const products = pgTable("products", {
    id: uuid("id").primaryKey().defaultRandom(),
    name: varchar("name", { length: 255 }),
    categoryId: uuid("category_id").notNull().references(() => categories.id),
    createdAt: timestamp("created_at").notNull().defaultNow(),
    updatedAt: timestamp("updated_at").defaultNow(),
    deletedAt: timestamp("deleted_at"),
})

export const productsRelations = relations(products, ({ one }) => ({
    category: one(categories,{
        fields: [products.categoryId],
        references: [categories.id],
    })
}))

export type Product = typeof products.$inferSelect
export type NewProduct = typeof products.$inferInsert

and it's related to category with one-to-many relationship

import { relations } from "drizzle-orm";
import { pgTable, timestamp, uniqueIndex, uuid, varchar } from "drizzle-orm/pg-core";
import { products } from "./product";

export const categories = pgTable("categories", {
    id: uuid("id").primaryKey().defaultRandom(),
    name: varchar("name", { length: 255 }),
    createdAt: timestamp("created_at").notNull().defaultNow(),
    updatedAt: timestamp("updated_at").defaultNow(),
}, (category) => {
    return {
        nameIndex: uniqueIndex("name_index").on(category.name),
    }
})

export const categoriesRelations = relations(categories, ({ many }) => ({
    products: many(products)
}))

export type Category = typeof categories.$inferSelect
export type NewCategory = typeof categories.$inferInsert

import { relations } from "drizzle-orm";
import { pgTable, timestamp, uniqueIndex, uuid, varchar } from "drizzle-orm/pg-core";
import { products } from "./product";

export const categories = pgTable("categories", {
    id: uuid("id").primaryKey().defaultRandom(),
    name: varchar("name", { length: 255 }),
    createdAt: timestamp("created_at").notNull().defaultNow(),
    updatedAt: timestamp("updated_at").defaultNow(),
}, (category) => {
    return {
        nameIndex: uniqueIndex("name_index").on(category.name),
    }
})

export const categoriesRelations = relations(categories, ({ many }) => ({
    products: many(products)
}))

export type Category = typeof categories.$inferSelect
export type NewCategory = typeof categories.$inferInsert

But when i try to do query findMany, it throws an error

 await db.query.categories.findMany({
      with: {
        products: true,
      },
    });

 await db.query.categories.findMany({
      with: {
        products: true,
      },
    });

The error like in the image. Thank you!

5 Replies

Mykhailo•9mo ago

Hello, @NyxSR! Could you please show how do you initialize db? You might forget to pass schema parameter. https://orm.drizzle.team/docs/rqb

Drizzle ORM - Query

Drizzle ORM is a lightweight and performant TypeScript ORM with developer experience in mind.

NyxSROP•9mo ago

So i've created a file called db.ts

// db.ts
import "dotenv/config";
import { drizzle } from 'drizzle-orm/postgres-js';
import postgres from "postgres";
import * as schema from '@/db/schema'

const postgresURI: string = process.env.POSTGRES_URI!

export const sql = postgres(postgresURI, {max: 1})

export const db = drizzle(sql, { schema });

// db.ts
import "dotenv/config";
import { drizzle } from 'drizzle-orm/postgres-js';
import postgres from "postgres";
import * as schema from '@/db/schema'

const postgresURI: string = process.env.POSTGRES_URI!

export const sql = postgres(postgresURI, {max: 1})

export const db = drizzle(sql, { schema });

NyxSROP•9mo ago

and for the schema value inside db variables is from this. what inside index.ts from db/schema is just a simple file

// db/schema/index.ts
export { users } from "./users";
export { categories } from "./category";
export { products } from "./product"

// db/schema/index.ts
export { users } from "./users";
export { categories } from "./category";
export { products } from "./product"

Mykhailo•9mo ago

@NyxSR you have to update your exports because you need relations too and then you can import from your schema/index

export * from './users';
// other exports

export * from './users';
// other exports

NyxSROP•9mo ago

Ahh i see, let me try that Thanks a lot @Mykhailo , that works !

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db.query throwing undefined is not an object (evaluating 'relation.referencedTable')