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ORDA – Handle an event-driven logic during database operations

This feature keeps going on with a new paradigm: handle data in an event-driven way. The 4D 21 provides a complete series of events related to database operations (save or drop).

ORDA events can replace triggers and offer many more advantages: more control, allowing you to code your business logic (including time consuming jobs such as printing invoices or storing external data) directly in an ORDA data class function. They respond to events on data level such as new, modify, save, drop (CRUD)

ORDA events offer precise granularity and sophisticated error handling, leading to a strong data integrity and a better code organisation.

Discover how to implement the appropriate business logic in each step of a save or drop action.

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ORDA – Constructor and touched event – Detailed behaviour through a network

In this previous blog post, you discovered that ORDA entities can now have a constructor, allowing entity instantiation to follow a complete object-oriented approach.

And that’s not all — another blog post introduced the first ORDA data event in a full series: the touched event.

Want to know exactly WHEN and WHERE the constructor and the touched event are triggered while actions move back and forth between a client application and the server? This blogpost is for you.

Keep reading to learn all the details and explore a live demo!

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ORDA – Get started with the touched event

ORDA is a core long-term feature that opens up a world of new possibilities in 4D.

We keep enhancing ORDA to help you write powerful code. As a result, your apps become easier to develop and maintain — and most importantly, they are optimized for great performance for your end users. 

That’s why we’re excited to introduce a new feature in 4D 20 R10: in-memory data events.

In a typical user journey, the required data by the user is loaded into memory, modified according to user actions, and finally saved when the user clicks a Save button.

What if you could automatically trigger business logic when in-memory data changes? It’s now possible to format or prepare data as early as possible, so it’s ready to save when needed.

This is made possible by the new ORDA touched event on data — and the benefits are considerable.

Want to learn more? Keep reading!

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ORDA – Get started with the entity constructor

The 4D language supports the concept of classes and thus, the concept of constructor.

On the another hand, the ORDA abstraction layer, through Data Model Classes, provides a great business benefit. It allows you to write business-oriented code and “publish” it just like an API. Datastore, dataclasses, entity selections, and entities are all available as class objects that can contain functions as well as computed attributes, and aliases.

This leads your apps to follow easily the MVC principles with powerful and optimized code.

To work with a complete object-oriented approach, starting from 4D 20 R10, entity classes can now have a constructor(). Need to set up initial values when a new entity is instantiated? It’s now possible!  Keep reading to learn more …

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Energize your Web applications with the OutgoingMessage Class

In today’s digital world, a smooth and intuitive user experience is key to any web application’s success. A critical part of this experience is providing users with easy access to various resources—whether documents, images, or other data types. To make this possible, your server must manage and deliver different content formats efficiently.

With 4D’s 20 R7 new REST server feature, managing diverse content delivery is now easier than ever. Previously, the REST server could only return scalar, entity, or entity selection data. Now, it can deliver full web content directly—content ready for a browser to handle.

Downloading files or receiving binary data from the REST server is now straightforward, thanks to the new OutgoingMessage class. With it, you can easily customize responses to suit your needs.

Read on to explore how the OutgoingMessage class can enhance your application!

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Improved 4D Client Licenses Usage with Qodly Studio for 4D

Those of you who have started using Qodly Studio for 4D  already know how powerful this new tool is for developing business web applications. If you haven’t yet, find here more information on getting started.

Apps made with Qodly Studio for 4D rely on the REST APIs. 4D 20 R5 is shipped with a great new feature: “Force Login” mode.

With Force Login mode, a 4D Client license is only consumed when users successfully log in and begin working with your application’s data and logic.

Keep reading to find out more! And don’t forget to download our demo to see it in action!

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ORDA – From Beginner to Expert

ORDA, which stands for Object Relational Data Access, is a method of accessing data that combines the advantages of object-oriented programming with those of relational databases, allowing developers to focus on solving business problems rather than managing data access.

Whether you are new to ORDA or already familiar with it and want to expand your knowledge, consider this blog post a road map to guide you through the learning process.

This blog post includes the following:

Without further ado, let’s get down to business!

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