[V5] serialize, toJSON errors

[remidosol]

When I want to serialize or transform to JSON a Model instance, I got this error:

Cannot read property 'serializeAs' of undefined
TypeError: Cannot read property 'serializeAs' of undefined
    at C:\Users\...\node_modules\@adonisjs\lucid\build\src\Orm\BaseModel\index.js:1189:51
    at Array.reduce (<anonymous>)
    at Proxy.serializeAttributes (C:\Users\...\node_modules\@adonisjs\lucid\build\src\Orm\BaseModel\index.js:1187:46)
    at Proxy.serialize (C:\Users\...\node_modules\@adonisjs\lucid\build\src\Orm\BaseModel\index.js:1250:21)
    at Proxy.toJSON (C:\Users\...\node_modules\@adonisjs\lucid\build\src\Orm\BaseModel\index.js:1289:21)
    at AdvertisementsController.create (C:\Users\...\app\Controllers\Http\AdvertisementsController.ts:23:47)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
    at Object.PreCompiler.runRouteHandler [as fn] (C:\Users\...\node_modules\@adonisjs\http-server\build\src\Server\PreCompiler\index.js:46:31)
    at Server.handle (C:\Users\...\node_modules\@adonisjs\http-server\build\src\Server\index.js:138:13)

Here is my serializing code:

const { category_id } = request.only(['category_id'])
const categoryWithMainSubFeatures = await Category.findBy('id',category_id)

let toJSON
try {
      toJSON = categoryWithMainSubFeatures!.toJSON() // AdvertisementsController.ts:23:47
} catch (err) {
      console.log(err.message)
      console.log(err.stack)
}
console.log(toJSON)

And here is Category Model columns:

@column({ isPrimary: true, serializeAs: 'id'})
public id: number

@column({serializeAs: 'title'})
public title: string

@column({columnName: 'parent_id', serializeAs: 'parentId'})
public parentId: number

@column.dateTime({ columnName: 'created_at', serializeAs: 'createdAt' })
public createdAt: DateTime

@column.dateTime({ columnName: 'updated_at', autoUpdate: true, serializeAs: 'updatedAt'})
public updatedAt: DateTime

[thetutlage]

Seems fine by just looking at the code. Can you please share a repo to reproduce the issue?

[remidosol]

Actually, I've found cause of error. But I can't fix it.

I've got a categoryHierarchy file for becoming category to be nested with its parents.

import Category from '../Category'
import { ModelObject } from '@ioc:Adonis/Lucid/Model'

const getHierarchy = async (lookup, child) => {
  const { 
    id, 
    title, 
    parentId, 
    createdAt, 
    updatedAt } = await lookup(child) || { id: null, title: null, parentId: null }
  
  return parentId == null || parentId == undefined
    ? {
      ...{ id, title, parentId, createdAt, updatedAt }
    }
    : { 
      ...{ id, title, parentId, createdAt, updatedAt 
      }, 
      ...{ parents: await getHierarchy(lookup, { parentId }) },
    }
}
  
const lookup = async (child) => {
  const noJSON = await Category.all()

  let categories = JSON.parse(JSON.stringify(noJSON))
  
  return new Promise(
    (resolve, reject) => setTimeout(
      () => resolve(categories.find(category => category.id === child.parentId))
      , 100)
  )
}
  
export const getAncestryCategory = async (category) => getHierarchy(lookup, category)

I use this inside of @afterFind hook like following:

if (category.$attributes.parentId !== null){
        let beforeParents = category.$attributes
        beforeParents.parents = await getAncestryCategory(beforeParents)
        category.$extras.parents = beforeParents.parents // Before, I've assigned beforeParents.parents to category.$attributes.parents but it gave same error again.
}

And the last of I've used it inside of AdvertisementController.create like I mentioned at first. I've used serialize, serializeComputed, serializeAttributes, serializeRelations and JSON.parse(JSON.stringify(categoryWithMainSubFeatures)) instead of toJSON(), but it gave same error everytime.

On verison 4.1, there was no error like that. It was running compeletly hassle-free.

[remidosol]

Now, I get no errors but still I can't add "parents" object to category's "$attributes", it gives same error. When I put it into "$extras", it doesn't give error but "parents" doesn't come with serialized Model.