Author: Marie-Sophie Landrieu-Yvert

• Product Owner • Marie-Sophie Landrieu-Yvert has joined the 4D Product team as a Product Owner in 2017. As a Product Owner, she is in charge of writing the user stories then translating it to functional specifications. Her role is also to make sure that the feature implementation delivered is meeting the customer need.Marie-Sophie graduated from the ESIGELEC Engineering School and began her career as an engineer at IBM in 1995. She participated on various projects (maintenance or build projects) and worked as a Cobol developer. Then she worked as an UML designer and Java developer. Lately her main roles were analyzing and writing functional requirements, coordinate business and development teams.
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ORDA: Breaking news for entity selection methods

When it comes to ORDA, 4D v18 R3 is full of good news! New member methods are at your disposal to further enhance your coding experience.

For starters, extracting data from an entity selection has been greatly enriched allowing you to build a fully customized collection with your entity selection data.

In addition, we’re providing you a way to indicate to an entity selection that its data needs to be refreshed from the server immediately, invalidating cached data.

Interested in some details? Keep reading, everything you need to know is below. 

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Ease your developer’s life with list boxes

Our main objective is to make developers’ lives easier, day after day, and list boxes are one 4D’s most used and powerful form objects that serve this purpose. We all know that list boxes trigger many events, that’s why in 4D v18 R2 we’ve enhanced the Form event command to return even more information when list box events are triggered.
Want to let go of your old tricky code for guessing which row, column, or header you clicked or put your mouse on? Let us show you a smoother and smarter way to do it!
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Multiple 4D data sources, interested?

We’ve got an exciting new feature to announce in 4D v18 and the title may have already given you a hint!

This feature opens new possibilities for client/server work. Rather than being limited to the current database and requiring a permanent network connection, an application in 4D v18 can get data from another, remote 4D database that’s exposed on a 4D server!

A lot of options become available thanks to this feature. For example, you could organize your applications to work offline and only synchronize local data when remote data is reachable. Or you could consider publishing your data on multiple servers and switching from one to the other as necessary. Another option could be splitting your data model across different databases (e.g. local data, international data). What about having your data distributed in different places yet still accessible through a single 4D client code (project methods and form objects)? All of these scenarios are now possible and this blog post tells you how!

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Optimize your ORDA code with requests logging

Ever need to analyze the traffic of your ORDA requests between a client and the 4D server? Sometimes it may take a while to receive a response from the server, which can make you wonder if it’s due to network traffic or to an unoptimized request you’ve written! Thankfully, 4D v17 R6 makes it possible to determine the likely reason(s) for this latency with the new ORDA methods available on the ds object. They’re not only debugging functions, they also allow you to optimize your ORDA code with a better understanding of the sent requests.

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More sophisticated ORDA queries with formulas

In 4D v17 R6, ORDA queries are becoming increasingly more powerful and concise. This blog post is for those of you who need more sophisticated search criteria than just a simple syntax like “name = Smith‘”. With this R-release, you can use any project method or 4D expression in the query() member method by using formulas.

What better way to explain this feature than with an example? Let’s dig into the details.

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Write generic code with the latest ORDA features

ORDA has its share of features with 4D v17 R5, including various ways to write generic code.

Writing generic code allows you to centralize your code to facilitate updating it. Not only does it enable you to write reusable code that can be used in different use cases, freeing you from having to reinvent the wheel again and again, it also lets you add extra functionalities on top of what you’ve already done.

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ORDA member methods to get the structure information

How can I know the dataClass of an entity? I need it to write generic methods“. “I need information about a field in a dataClass: what is its type? Is it indexed? Is it unique?“. These are the kinds of questions we’ve heard you asking on the forum. 4D v17 R5 provides the answers: introducing new ORDA member methods to provide useful information about your database. Keep reading, because you’ll appreciate the benefits of reducing the size of your code and making it reusable and easy to maintain!