Programmatically get columns from table

Hi all I'm wondering if it's possible to programmatically return columns from a table. For example

import { z } from "zod";
import { SelectUserSchema } from "../db/schema";

type UserColumns = z.infer<typeof SelectUserSchema>;

type UserColumnParams = Partial<Record<keyof UserColumns, boolean>>;

export function getUserColumns<T extends Partial<UserColumnParams>>(data: T) {
  const columns: Record<keyof UserColumnParams, boolean> = {
    createdAt: false,
    email: false,
    id: false,
    firstName: false,
    lastName: false,
    updatedAt: false,
    password: false,
  };

  for (const key in data) {
    if (data[key]) {
      columns[key as keyof UserColumnParams] = true;
    }
  }

  return columns;
}


const user = await db.query.users.findFirst({
  columns: getUserColumns({
    id: true,
    email: true,
    firstName: true,
    lastName: true,
  }),
  where: eq(userModel.id, id),
});

import { z } from "zod";
import { SelectUserSchema } from "../db/schema";

type UserColumns = z.infer<typeof SelectUserSchema>;

type UserColumnParams = Partial<Record<keyof UserColumns, boolean>>;

export function getUserColumns<T extends Partial<UserColumnParams>>(data: T) {
  const columns: Record<keyof UserColumnParams, boolean> = {
    createdAt: false,
    email: false,
    id: false,
    firstName: false,
    lastName: false,
    updatedAt: false,
    password: false,
  };

  for (const key in data) {
    if (data[key]) {
      columns[key as keyof UserColumnParams] = true;
    }
  }

  return columns;
}


const user = await db.query.users.findFirst({
  columns: getUserColumns({
    id: true,
    email: true,
    firstName: true,
    lastName: true,
  }),
  where: eq(userModel.id, id),
});

In doing so, the result is this image posted below. Is there a way I can do this programmatically or do I have to reference every value manually?

2 Replies

Mykhailo•10mo ago

Hello, @NinjaBunny! You can find useful information here https://orm.drizzle.team/learn/guides/queries/include-or-exclude-columns

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NinjaBunnyOP•10mo ago

I don't think this applies to relational queries as well

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Programmatically get columns from table