books/models/baseModels/JournalEntry/JournalEntryServer.js

import Document from 'frappe/model/document';
import LedgerPosting from '../../../accounting/ledgerPosting';

export default class JournalEntryServer extends Document {
  getPosting() {
    let entries = new LedgerPosting({ reference: this });

    for (let row of this.accounts) {
      if (!row.debit.isZero()) {
        entries.debit(row.account, row.debit);
      } else if (!row.credit.isZero()) {
        entries.credit(row.account, row.credit);
      }
    }

    return entries;
  }

  beforeUpdate() {
    this.getPosting().validateEntries();
  }

  beforeInsert() {
    this.getPosting().validateEntries();
  }

  async beforeSubmit() {
    await this.getPosting().post();
  }

  async afterRevert() {
    await this.getPosting().postReverse();
  }
}