Relations include query

export const sales = mysqlTable("Sales", {
    id: int("id").autoincrement().notNull(),
    startingDate: datetime("starting_date", { mode: 'string'}).notNull(),
    expirationDate: datetime("expiration_date", { mode: 'string'}),
    bundleId: int("BundleId").references(() => bundles.id, { onDelete: "set null", onUpdate: "cascade" } ),
},
(table) => {
    return {
        bundleId: index("BundleId").on(table.bundleId),
        salesId: primaryKey(table.id),
    }
});

export const bundles = mysqlTable("Bundles", {
    id: int("id").autoincrement().notNull(),
    amount: float("amount").notNull(),
    name: varchar("name", { length: 255 }),
},
(table) => {
    return {
        bundlesId: primaryKey(table.id),
    }
});

await db.query.sales.findFirst({
    where: eq(sales.businessUserId, id),
    orderBy: desc(sales.id),
    with: {
        bundles: true
    },
  });

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

Sale

Bundle

BundleId