Events

Enter a new dimension with 4D v17 and ORDA – Thomas & LR from the 4D Summit 2018

Automatically translated from English

Object Relational Data Access, or simply ORDA, is the biggest feature set we’ve ever had … in more than 30 years. And the biggest announcement of the 4D Summit 2018.

Watch the video of the ORDA announcement during the 4D Summit 2018 Keynote. It features Thomas Maul, VP of Product Strategy, introducing this progressive technology and explaining how using your database as an object can open a whole new world of possibilities for your 4D-based applications.

Product

Display an entity selection in a list box

Automatically translated from English

4D v17 introduces a new concept: ORDA. If you’re not familiar with ORDA yet, we’ve created a series of blog posts to explain how to use and take advantage of ORDA. When working with ORDA, you’re going to use entity selections, which are basically objects containing references to entities belonging to the same dataclass (i.e. table). One of the main benefits of ORDA, is the very simple and powerful ability of binding with forms.

In this blog post, you’ll learn how to display an entity selection in a list box. In fact, it’s very simple.

Product

Handle entities in an entity selection

Automatically translated from English

FIRST RECORD, LAST RECORD, NEXT RECORD, PREVIOUS RECORD; does that ring any bells? I bet it does. You’ve already been using them to handle selections! ORDA provides useful and familiar methods to navigate through entities in an entity selection – and obviously, some perks!

For starters, you can handle several entity selections at the same time and navigate through them independently, whereas normally you can only manage a single ‘current selection’ per table. That’s precisely what we’re going to see in this blog post.

Product

Working with ORDA optimistic locking

Automatically translated from English

4D v17 introduces ORDA, a major evolution in 4D which is opening a world of new possibilities for 4D developers. One of the benefits of using ORDA is related to record locking, because ORDA offers a choice between optimistic and pessimistic locking. After having introduced the ORDA locking mechanisms, we continue the ORDA series so you can discover how to work efficiently with optimistic locking with ORDA.

Product

Locking entities with ORDA

Automatically translated from English

The ORDA series continues! In this blog post, we’ll look at how you can use locks in your databases with ORDA concepts! It’s not uncommon to need to manage conflicts that might occur when several users or processes load and/or attempt to modify the same records at the same time. Record locking is a methodology used in relational databases to avoid inconsistent updates to data.

ORDA provides an optimistic locking mode in addition to the one you already know (pessimistic locking).

Product

ORDA: work with objects and collections

Automatically translated from English

In this latest addition to the ORDA series, we’ll look at how the new ORDA concepts can interact with existing objects and collections. In fact, it’s possible to turn entities and entity selections into objects and collections, as well as build entities and entity selections from objects and collections. By doing so, you can easily integrate ORDA code within your existing code. You can take full advantage of ORDA without needing to rewrite your code!

Product

Going back and forth between current selections to ORDA

Automatically translated from English

ORDA is a major innovation of 4D v17, this is why we’re dedicating an entire series of blog posts to ORDA. While ORDA has its own concepts that are very different from the classic approach, it’s still possible to mix ORDA with your existing code.

In a nutshell, this blog post will show you how you can update the current selection of a table from an entity selection and get an entity selection from the current selection of a table. It’ll allow you to smoothly integrate ORDA concepts into your existing 4D code, step by step.