[Question] How to serialize query results?

[Hugo Pineda]

Hello!

This might be an issue related to Svelte, but I still think is worth asking the difference, or why a knex query result is serializable and an objection is not.

Example on a +page.server.ts in Svelte:

import { Model } from 'objection'
import knex from 'knex'

const pg = knex({
  client: 'pg',
  connection: process.env.DATABASE_URL,
  searchPath: ['public'],
})

Model.knex(pg)

class User extends Model {
  static get tableName() {
    return 'users'
  }
}

export const load = async () => {
  const users = await User.query()
  return {
    users,
  }
}

The above code fails on Svelte with a Cannot stringify arbitrary non-POJOs error. I can circumvent this issue with users: users.map((u) => u.toJSON()), but seems inefficient for large resultsets.

What is most curious to me, is that a knex query works without parsing to JSON:

import knex from 'knex'

const pg = knex({
  client: 'pg',
  connection: process.env.DATABASE_URL,
  searchPath: ['public'],
})

export const load = async () => {
  const rawUsers = await pg.select('*').from('users')
  return {
    rawUsers,
  }
}

Any advice on how to properly use Objection in Svelte is highly appreciated 🙏