fetchAll, and select specific column from related

Hi all, I’ve an issue I can’t understand.

I have two models :

file.js

const bookshelf = require('../database');

require('./moderation');

const File = bookshelf.Model.extend({
  tableName: 'file',
  moderation() {
    return this.hasMany('Moderation', 'file');
  }
});

module.exports = bookshelf.model('File', File);

moderation.js

const bookshelf = require('../database');

const Moderation = bookshelf.Model.extend({
  tableName: 'moderation',
  file() {
    return this.belongsTo('File', 'file');
  }
});
module.exports = bookshelf.model('Moderation', Moderation);

And I aim to do something like this :

File
    .where('user', userId)
    .fetchAll({
      withRelated: [{
        moderation(query) {
          query.select('comment', 'created_at'); // <--- doesn't work
          query.orderBy('created_at', 'DESC'); // <--- works if previous line is commented
        }
      }],
      debug: true,
    })
    .then((files) => {
      console.log(JSON.stringify(files.toJSON(), null, 4));
    })
    .catch((err) => {
      console.log('err', err);
    });

If I add a query.select in the withRelated, I simply get an empty array, but if I add a query.orderBy('created_at', 'DESC'), and only it, it works (list my ‘moderations’ in the returned object, sort by creation date desc)

Do I do something wrong ?

The logs :

with the select and order by:

{ method: 'select',
  options: {},
  timeout: false,
  cancelOnTimeout: false,
  bindings: [ '1409508080453948467' ],
  __knexQueryUid: 'a0000a2b-4dc4-4c76-873f-384bf3e133f5',
  sql: 'select "file".* from "file" where "user" = ?' }
{ method: 'select',
  options: {},
  timeout: false,
  cancelOnTimeout: false,
  bindings: [ '1424566923860907012', '1414402803459168246' ],
  __knexQueryUid: '69e422a7-869e-44b1-9963-279e6ed861a8',
  sql: 'select "comment", "created_at" from "moderation" where "moderation"."file" in (?, ?) order by "created_at" DESC' }

without the select :

{ method: 'select',
  options: {},
  timeout: false,
  cancelOnTimeout: false,
  bindings: [ '1409508080453948467' ],
  __knexQueryUid: 'b223bc7e-4684-41e8-b33d-f1135e969c7c',
  sql: 'select "file".* from "file" where "user" = ?' }
{ method: 'select',
  options: {},
  timeout: false,
  cancelOnTimeout: false,
  bindings: [ '1424566923860907012', '1414402803459168246' ],
  __knexQueryUid: '44bfd21e-fc33-4c32-8ca2-1cdf1230094a',
  sql: 'select "moderation".* from "moderation" where "moderation"."file" in (?, ?) order by "created_at" DESC' }

Edit: While digging into this issue, I’ve tried to change the model :

file.js

const bookshelf = require('../database');

require('./moderation');

const File = bookshelf.Model.extend({
  tableName: 'file',
  hasTimestamps: ['created_at', 'updated_at'],
  moderation() {
    return this.hasMany('Moderation', 'file')
      .query({
        select: ['moderation.comment', 'moderation.created_at'],
        orderBy: ['moderation.created_at', 'DESC']
      });
  }
});

module.exports = bookshelf.model('File', File);

And then

File
    .where('user', userId)
    .fetchAll({
      withRelated: ['moderation'],
      debug: true,
    })
    .then((files) => {
      console.log(JSON.stringify(files.toJSON(), null, 4));
    })
    .catch((err) => {
      console.log('err', err);
    });

but same issue

[oscaroox]

@kai23 after looking at your models i’ve noticed that a File can have many moderations, meaning that you would have to select the foreign key of the file with the comment and created_at. It should work if you also select the foreign key

query.select('comment', 'created_at', 'file_id')

[kai23]

Yes thanks for the hint. I’ll close now.