Data View Customization in Extension - acumatica

Question

I have overwritten the data view for a custom graph in an extension, which returns the correct data without issue, both by re-declaring the view, and using the delegate object techniques. The issue is that when I do, the AllowSelect/AllowDelete modifications on the view in the primary graph stop working, once I comment out the overwrite, the logic works as normal.
Not sure what I'm missing, but any thoughts would be appreciated
Edit: To clarify, on the main graph, without the extension, the data retrieval and Allow... work without issue
public class FTTicketEntry : PXGraph<FTTicketEntry, UsrFTHeader>
{
public PXSelect<UsrFTHeader> FTHeader;
public PXSelect<UsrFTGridLabor, Where<UsrFTGridLabor.ticketNbr, Equal<Current<UsrFTHeader.ticketNbr>>>> FTGridLabor;
And with the extension, the data is returned correctly from the modified view, but the Allow... do not work from the main graph, only when entered on the extension
public class FTTicketEntryExtension : PXGraphExtension<FTTicketEntry>
{
public PXSelect<UsrFTGridLabor, Where<UsrFTGridLabor.ticketNbr, Equal<Current<UsrFTHeader.ticketNbr>>, And<UsrFTGridLabor.projectID, Equal<Current<UsrFTHeader.projectID>>, And<UsrFTGridLabor.taskID, Equal<Current<UsrFTHeader.taskID>>>>>> FTGridLabor;
I have also tried the other process on the extension with the same results, the data is filtered correctly, but the Allow... commands fail.
public PXSelect<UsrFTGridLabor, Where<UsrFTGridLabor.ticketNbr, Equal<Current<UsrFTHeader.ticketNbr>>>> FTGridLabor;
public virtual IEnumerable fTGridLabor()
{
foreach (PXResult<UsrFTGridLabor> record in Base.FTGridLabor.Select())
{
UsrFTGridLabor p = (UsrFTGridLabor)record;
if (p.ProjectID == Base.FTHeader.Current.ProjectID && p.TaskID == Base.FTHeader.Current.TaskID)
{
yield return record;
}
}
}
My main concern with not wanting to use PXSelectReadOnly, is that there is a status field on the header which drives when certain combinations of the conditions are required and are called on the rowselected events, sometimes all and sometimes none, and the main issue is that I obviously don't want to have to replicate all of the UI logic into the extension, when overwriting the view was the main intent of the extension for the screen.
Appreciate the assistance, and hopefully you see something I'm overlooking or have missed
Thanks

Answer 1

Every BLC instance stores all actual data views and actions within 2 collections: Views and Actions. Whenever, you customize a data view or an action with a BLC extension, the original data view / action gets replaced in the appropriate collection by your custom object declared within the extension class. After the original data view or action was removed from the appropriate collection, it's quite obvious that any change made to the original object will not make any effect, since the original object is not used by the BLC anymore.
The easiest way to access actual object from either of these 2 collections would be as follows: Views["FTGridLabor"].Allow... = value;
Alternatively, you might operate with AllowInsert, AllowUpdate and AllowDelete properties on the cache level: FTGridLabor.Cache.Allow... = value;
By changing AllowXXX properties on the cache level, you completely eliminate the need for setting AllowXXX on the data view, since PXCache.AllowXXX properties have higher priority when compared to identical properties on the data view level:
public class PXView
{
...
protected bool _AllowUpdate = true;
public bool AllowUpdate
{
get
{
if (_AllowUpdate && !IsReadOnly)
{
return Cache.AllowUpdate;
}
return false;
}
set
{
_AllowUpdate = value;
}
}
...
}
With all that said, to resolve your issue with UI Logic not applying to modified view, please consider one of the following options:
Set AllowXXX property values in both the original BLC and its extensions via the object obtained from the Views collection:
Views["FTGridLabor"].Allow... = value;
operate with AllowXXX property values on the cache level: FTGridLabor.Cache.Allow... = value;

Answer 2

First check if your DataView should/should not be a variant of PXSelectReadonly.
Without more information my advice would be to set the Allow properties in Initialize method of your extension:
public override void Initialize()
{
// This is similar to PXSelectReadonly
DataView.AllowDelete = false;
DataView.AllowInsert = false;
DataView.AllowUpdate = false;
}