Extensions for Banana Accounting+

Introduction

By creating an Extension you can add new functionalities to the Banana Accounting Plus software:

• Create your own calculations or reports
  • Interest calculation
  • Statistics on transactions data
  • Report based on special query
• Import data from proprietary file format
  • Import data from a bank file format and automatically assign accounts.
  • Import data from an invoice software.
  • Consolidate accounting data entered with other software.
• Export data in a custom format
  • Create an Export file for the Tax authorities.
  • Export the balances of some accounts in a format ready to be published on internet or inserted in other documents.
• Check the accounting data
  • Test transactions for a particular condition; You can show the rows that didn't meet the condition in a table, or display a message with detailed information to the user.
• Modify the accounting data
  • Use the DocumentChange API to allows extensions to change the content or any open Banana Accounting file.
  • Add, modify, replace, delete and move rows and columns of any table.
  • Modify single row's fields, like for example the row's description or the transaction's exchange rate.
  • Import external data and insert new accounts as well as new transactions in one single run.

Install extensions 

In the Banana Accounting Marketplace you find many useful extensions.

• View and Install in Menu Extensions > Manage Extensions

Developing extensions

Extensions for Banana Accounting are written in Javascript and here we get the first resources that give you an idea. 

• Reference documentation
  • Extension Javascript file 
    This will show you how an extension file is structured.
    • Attributes section
  • Extension package 
    The package allows to pack many extensions together and also include different source and other resource files.  
  • The different Extension's types
    You can create extensions for import, preparing reports, etc.
    • General Extensions 
      For creating reports or changing data.
    • Import Extensions 
      For automatically converting a bank CSV and create accounting transactions.
  • Installation and running
    • Installing and Running Extensions.
  • Introduction do major topics
    • Retrieve and Modify Data
    • Display & Input
    • File, Import, Export
    • Debugging
    • Test Framework
    • Installation & Execute
• Start writing an extension.
  • Build your first File Based Extension
  • Build your first Embedded Extension
  • Extension for importing transactions from CSV
  • Extension for Creating a Report with a Table
• API Documentation
  Fully commented class documentation and examples
  • Extensions API, Namespace, Formats, Versions
  • Banana (Objects)
  • Banana.Application
  • Banana.Document (Accounting)
  • Banana.Document (Base)
  • Banana.Document.Table
  • Banana.Document.Column
  • Banana.Document.Cursor
  • Banana.Document.Row
• Developing, Testing and Debugging
  • Debugging
  • Test Framework 

Examples file

• Embedded extensions Tutorial
• Embedded Reports Tutorial
• Embedded Import CSV
• On github.com/BananaAccounting you will find the GitHub repository for Extensions.

Banana Accounting Extensions Maker GPT

The GPT is only experimental: it might be subject to changes and improvements.

This GPT was created using ChatGPT, and is intended for creating extensions or asking questions about extension development. The GPT uses documentation updated as of 10.01.2025.

Requirements

To use this GPT, you must have a ChatGPT Plus subscription. Without it, you can try the service for free for up to ten requests. After that, you’ll need to either upgrade to ChatGPT Plus or wait some hours before making additional requests.

How it works

• Open the Banana GPT from this link:
  • https://chatgpt.com/g/g-tqSbETV6v-banana-accounting-extensions-maker-gpt.
• In the Message field at the bottom, enter a sentence describing what you want. Generally, more specific requests will yield better results.
• GPT will process your request and returns the javascript code.
• Generated code should always be checked.

Examples of messages to enter in GPT

The following are examples of messages that can be entered into the GPT chat.

• Create an extension that prints a report on which text is displayed.
• Create an extension that prints a report. In the report I want to see a table with data taken from the Accounts table. In the first column enter the Account, in the second column the Description, and in the third column the Balance. Enter only the rows that have an account. Align the amounts on the right and the descriptions in the middle. I am working on a double-entry accounting system with VAT.