LinkedCommand & callbackcommand not doing anything - acumatica

Question

I'm trying to add an hyperlink from a field in a grid in a processing screen pointing to a custom object I made but it seems it doesnt do anything.
When I try to debug and set breakpoints it seems it doesnt even execute the code in my function.
I tried following this : How to create a hyperlink user field
And I tried to follow the example 3.4 in T200 (which is basically the same)
Here's my code :
public PXAction<ARRegister> ViewLettering;
[PXButton]
protected virtual void viewLettering()
{
ARRegister row = LinesPendingLettering.Current;
LELettering letPiece = PXSelect<LELettering,
Where<LELettering.letteringCD,
Equal<Required<LELettering.letteringCD>>>>
.Select(this, row.GetExtension<ARRegisterLeExt>().LettrageCD);
// Create instance of destination graph
LetteringAR graph = PXGraph.CreateInstance<LetteringAR>();
graph.Piece.Current = letPiece;
if (graph.Piece.Current != null)
{
throw new PXRedirectRequiredException(graph, true, Constantes.letteringPiece);
}
else
{
throw new PXException(Constantes.errNotFound);
}
}
#endregion
And the code of my page :
<%# Page Language="C#" MasterPageFile="~/MasterPages/FormDetail.master" AutoEventWireup="true" ValidateRequest="false" CodeFile="LE202001.aspx.cs" Inherits="Page_LE202001" Title="Untitled Page" %>
<%# MasterType VirtualPath="~/MasterPages/FormDetail.master" %>
<asp:Content ID="cont1" ContentPlaceHolderID="phDS" Runat="Server">
<px:PXDataSource ID="ds" runat="server" Visible="True" Width="100%"
TypeName="LE.ProcessAR"
PrimaryView="Filter"
>
<CallbackCommands>
<px:PXDSCallbackCommand Name="ViewLettering" Visible="False" DependOnGrid="grid" /></CallbackCommands>
</px:PXDataSource>
</asp:Content>
<asp:Content ID="cont2" ContentPlaceHolderID="phF" Runat="Server">
<px:PXFormView ID="form" runat="server" DataSourceID="ds" DataMember="Filter" Width="100%" Height="100px" AllowAutoHide="false">
<Template>
<px:PXLayoutRule StartColumn="True" ID="PXLayoutRule1" runat="server" StartRow="False"></px:PXLayoutRule>
<px:PXSelector CommitChanges="True" runat="server" ID="CstPXSelector2" DataField="BranchID" ></px:PXSelector>
<px:PXSelector AutoRefresh="True" CommitChanges="True" runat="server" ID="CstPXSelector1" DataField="AccountID" ></px:PXSelector>
<px:PXLayoutRule runat="server" ID="CstPXLayoutRule5" StartColumn="True" ></px:PXLayoutRule>
<px:PXNumberEdit runat="server" ID="CstPXNumberEdit3" DataField="TotalCredit" ></px:PXNumberEdit>
<px:PXNumberEdit runat="server" ID="CstPXNumberEdit4" DataField="TotalDebit" ></px:PXNumberEdit>
<px:PXLayoutRule runat="server" ID="CstPXLayoutRule6" StartColumn="True" />
<px:PXCheckBox CommitChanges="True" runat="server" ID="CstPXCheckBox7" DataField="ShowAll" ></px:PXCheckBox></Template>
</px:PXFormView>
</asp:Content>
<asp:Content ID="cont3" ContentPlaceHolderID="phG" Runat="Server">
<px:PXGrid SyncPosition="True" AutoAdjustColumns="True" ID="grid" runat="server" DataSourceID="ds" Width="100%" Height="150px" SkinID="Details" AllowAutoHide="false">
<Levels>
<px:PXGridLevel DataMember="LinesPendingLettering">
<Columns>
<px:PXGridColumn Type="CheckBox" AllowFilter="True" AllowCheckAll="True" CommitChanges="True" DataField="Selected" Width="30" ></px:PXGridColumn>
<px:PXGridColumn DataField="DocType" Width="70" ></px:PXGridColumn>
<px:PXGridColumn DataField="RefNbr" Width="70" ></px:PXGridColumn>
<px:PXGridColumn DataField="DocDesc" Width="200" ></px:PXGridColumn>
<px:PXGridColumn DataField="CuryOrigDocAmt" Width="100" ></px:PXGridColumn>
<px:PXGridColumn DataField="CuryID" Width="70" ></px:PXGridColumn>
<px:PXGridColumn LinkCommand="ViewLettering" DataField="LettrageCD" Width="70" ></px:PXGridColumn></Columns>
</px:PXGridLevel>
</Levels>
<AutoSize Container="Window" Enabled="True" MinHeight="150" ></AutoSize>
<ActionBar >
</ActionBar>
</px:PXGrid>
</asp:Content>

Answer 1

The generic type parameter of PXAction has to be the same DAC as the primary view DAC.
The primary view attribute is set on PXDataSource element in the ASPX page:
<px:PXDataSource ID="ds" runat="server" PrimaryView="Filter">
In your graph or graph extension you can locate the primary view DAC:
public PXFilter<DAC> Filter;
Make sure the PXAction declaration is on the same DAC:
public PXAction<DAC> Action;

Answer 2

Adding an observation I had to this older thread, hoping it may help someone:
If you have everything setup as recommended but it is still not working, look carefully at your use of OrderBy in the View's delegate, specifically whether you defined an OrderBy<> directly on its PXSelectBase or used an OrderByNew<> later in
the delegate logic. Using OrderBy<> worked well, but using OrderByNew<> affected the functionality. Details:
The View:
[PXFilterable()]
public PXSelectOrderBy<DAC, OrderBy<Asc<DAC.field1>>> Records;
The Delegate:
protected virtual IEnumerable records()
{
PXSelectBase<DAC> cmd = new PXSelectJoinOrderBy<DAC,
InnerJoin<OtherDAC, On<DAC.field1, Equal<OtherDAC.field1>>>,
OrderBy<Desc<DAC.field1,
Desc<DAC.field2>>>>(this);
...
some filtering logic
...
// defining OrderByNew affected DependOnGrid/LinkCommand functionality
// cmd.OrderByNew<OrderBy<Desc<DAC.field1,
// Desc<DAC.field2>>>>();
foreach(DAC rec in cmd.Select())
yield return rec;
}
I am using 2018R1, Build 18.112.0019.