To Validate or Not to Validate: Line validation in Dynamics 365 Business Central Documents

Sun, 05 Mar 2023 19:54:00 +0000

This is a short note on how to add further validation to the sales or purchase document lines in Dynamics 365 Business Central with a small AL code extension.

There are a number of validations operating in the background for sales and purchase lines. Sometimes you need to add to this, in this example I'll build a small app to meet the following requirement.

Prevent sales lines with zero value

This is a great starting point for building apps https://learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/developer/devenv-get-started

To meet this requirement I'll use the OnAfterInsert trigger which will carry out the checks after the system already validated at the database level.

https://learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/developer/triggers-auto/tableextension/devenv-onafterinsert-tableextension-trigger

Here is the example code:

Lets see what ChatGPT has to say about this

Pretty handy!

What if we want more? I asked to validate in a different way: "Please rewrite the code to also prevent the job and job task from being blank"

Looks good, I liked the way it also updated the error message, very handy. Would need testing of course.

The original simple .app and code can be found here https://github.com/andywingate/d365bc-validatesalesline

Chatgpt on Wingate365

To Validate or Not to Validate: Line validation in Dynamics 365 Business Central Documents