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Single form has some data source methods not extending properly

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Posted on by AB-28040732-0

Hello together!

There is a standard form LogisticsPostalAddress (Directory model) having LogisticsPostalAddress.Extension (App Suite model). This extension adds TaxRegistration table into it, this table has no insert/update/delete on table level. Also all extension logic is built using event handlers, mostly in LogisticsPostalAddressFormEventHandler class.

What I found:

1. write and delete methods for the form data source extension are not called at all, but validateWrite and validateDelete are called properly.

2. Table extension methods are called properly, but for insert, update and delete this.isFormDataSource() returns false when data processing is done via UI. But validateWrite and validateDelete methods return true as they should.

2nd point is result of 1st one I suppose. But I see no reason of such behaviour. Does anyone have any idea where can problem be originated from?

Only delete-related methods are presented below in the code for simplification.

I performed full build on directory and appSuite models having "include referenced models" checkbox set to yes.

Also it was reproduced on another devbox which is used for another project.

[ExtensionOf(formDataSourceStr(LogisticsPostalAddress, TaxRegistration))]
final class LogisticsPostalAddress_TaxRegistration_Fds_Extension
{
    public void delete() // not called
    {
        Info("fds delete extension"); 
        next delete();
    }

    public boolean validateDelete() // called
    {
        Info("fds validateDelete extension");
        return next validateDelete();
    }
}

[ExtensionOf(tableStr(TaxRegistration))]
final class TaxRegistration_Dbt_Extension
{
    void delete()
    {
        if (this.isFormDataSource())
            info("table delete is FDS");
        else
            info("table delete is not FDS"); // goes this way
	next delete();
    }

    public boolean validateDelete()
    {
        if (this.isFormDataSource())
            info("table validateDelete is FDS"); // properly shown
        else
            info("table validateDelete is not FDS");
        return next validateDelete();
    }
}

thank you for any helpful ideas!

BR, Aleksei

Categories:

Dynamics 365 Finance

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André Arnaud de Cal... 301,148 Super User 2025 Season 2 on at

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Hi Aleksei,

A possible explanation is that records are not physically deleted. The table is part of a date effectiveness framework where records are managed as being current using the fields ValidFrom and ValidTo.

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Raj Borad 1,428 on at

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Hi @AB-28040732-0,

I think that this issue arises because the `TaxRegistration` data source in `LogisticsPostalAddress` is likely marked as Insert/Update/Delete = No in the form data source properties, or it’s read-only due to join or mode configuration.

This prevents the form data source’s `delete()` method from being triggered, even though `validateDelete()` is still called during validation checks. Since table's `delete()` method is called outside of the form data source context, `this.isFormDataSource()` returns false.

To confirm, check the `TaxRegistration` data source properties in the form, and also ensure deletes are not handled solely through event handlers bypassing standard form methods. Consider logging the call stack to trace execution origin.

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Suggested answer

Khushbu Rajvi. 20,629 Super User 2025 Season 2 on at

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Hope this helps:https://community.dynamics.com/forums/thread/details/?threadid=cb2daece-7295-4b61-9aaa-1e284dfc00a5

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