Conceptual questions on the SDK: Dev Best Practices

Question

Hello ByD Community,
As I am not a master in development, I have interrogations on many things regarding how I should do my development in the SDK.
First, for my first question I will take an example:
BO Extensions:
- Imagine you already have extended one of your Business Object (Purchase Order) with error messages, a new field in one screen, etc.. for a specific solution.
- Now, you need to do another work for the same customer in the same Business Object
* What should we do?:
          - Create a new Customer-Specific solution with a new extension of the Purchase Order BO? Or will this create issues between the two extensions created? Actually is it possible to create as many BO Extensions for the same BO in the same tenant?
          - Or we should go in the already done BO Extension and do the thing you need and add them to the scripts you already did for the first solution?
Second issue:
Where the changes will apply when we extend a Business Object contained in various screens?
My second issue is that I have problems understanding how all the screens in ByD are separated according to the BO in the Repository explorer. Finding the screens in the UI designer is easy, but I have problems understanding how the repository is working sometimes.
- Imagine you want to make a field mandatory in a specific screen, the Product Category ID in Purchase Order for example. So you go and you write your scripts in the Purchase Order Extension BO created. And you choose the ProductCategoryID which is in the PurchaseOrder BO from the repository explorer
- How are we sure that the ProductCategoryID becomes mandatory only in the Purchase Order creation screen and not in other screens as we never specify for which screen we want this message? This is the concept I have the more problem getting into. How my Business Logic developed in the SDK only affects some screens and not others?
- Finally, can we assume that this PurchaseOrder.Item.ProductCategoryID (not the real path just for example) is a different element that PurchaseRequest.Item.ProductCategoryID? So as if we make changes to the PO.ProductCategoryID, it won't affect the PR.ProductCategoryID.
Thank you very much for your help and for your guidance to improve my understanding.
Best regards!
Jacques-Antoine

Answer 1

Hello Jacques-Antoine,
Your first question: "another work for the same customer in the same Business Object"
If this belongs to the same project it should be part of the same solution.
If this is a new project then create a new solution
You can create as many solutions as you want and expand in these solutions the same BO again and agin.
Second question: "extend a Business Object contained in various screens"
If you extend the BO it si valid in all screens where this BO is used.
So setting a element as mandatory will be applied to all UIs.
If you want to have this only for a specific UI, you must enhance this UI
HTH,
   Horst