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Dynamics 365 Community / Forums / Finance | Project Operations, Human Resources, ... / Buf2Buf error in table...
Finance | Project Operations, Human Resources, ...
Answered

Buf2Buf error in tables with Inheritance

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Posted on by SGbron 157

Hello to everyone. 

I have 2 tables. TableA and TableB. TableB use inheritance and extends TableA

It seems that everything works fine but I have one weird issue. 

I use a method like this: 

public void createElement(TableA _parentRecord, TableA _copyRecord)
{
    TableA newRecord;

    if (_copyRecord)
    {
        buf2Buf(_copyRecord, newRecord);
        //Other Code
    }
    else
    {
        buf2Buf(_parentRecord, newRecord);
        //Other Code
    }


I always recieve an error that inform that  "The field with ID '36' does not exist in table 'TableA'

I entered to the debugger inside the buf2Buf() to understand why this happens and I saw that the _from buffer is TableB and not TableA

even if I tried to cast again the buffers to TableA , when it goes inside the buf2buf method the type is TableB. 

Does anyone know why this happens?

I have the same question (0)
  • Martin Dráb Profile Picture
    Martin Dráb 237,965 Most Valuable Professional on at

    Casting an object to a parent type indeed doesn't change its type. It's still the same object as before.

    What is your intention here? Do you want to ignore all fields define in TableB? If not, your attempt to convert TableB to TableA wouldn't meet your requirements, even if it worked.

    In short, it seems that buf2buf() doesn't support what you want. Can't you achieve your goal with data() method?

  • SGbron Profile Picture
    SGbron 157 on at

    Hello Martin.

    Exactly, I want to ignore all fields that are coming from TableB. Becasue I received this error with the fieldId.

    And also I dont need them.

    .TableA does contain all the fields that I want. So what i am trying to do is to copy one record and I jsut want to modify some fields values after. Because there are many fields (almost 90%) that will remain the same.

    .data it was the first thing that I did but it didn't anything from values from the _parentRecord.

    I thought that this is becasue microsoft recomends on inheritance to use buf2buf instead of data.

    learn.microsoft.com/.../dynamics.ax.application.xrecord.data

  • Verified answer
    Martin Dráb Profile Picture
    Martin Dráb 237,965 Most Valuable Professional on at

    I don't think you'll get it working when using two different types (TableA and TableB). But if you're interested just with fields from the parent table, you could select its buffer directly.

    You can see an example below. I changed the types to DirPartyTable and DirPerson, to be able to test the code.

    void run()
{
    DirPerson person;
    select firstOnly person;

    this.createElement(person);
}

public void createElement(DirPartyTable _parentRecord)
{
    DirPartyTable input;

    if (_parentRecord.TableId == tableNum(DirPartyTable))
    {
        input = _parentRecord;
    }
    else
    {
        select firstonly input
            where input.RecId == _parentRecord.RecId;
    }

    DirPartyTable newRecord;
    buf2Buf(input, newRecord);
    info(newRecord.Name);
}

  • SGbron Profile Picture
    SGbron 157 on at

    Exactly

    it was solved with just a find method.

    TableA parent = TableA::findRecId(_parentRecord.RecId);

buf2Buf(parent, newElement);


    And now the returned type of the Object is TableA instead of TableB

    The thing that i dont understand is how it is posible to give in the method a TableA record from the cursor() position in the form and inside the method that record is a TableB record. 

    Anyway the problem is solved. 

    Thank you Martin

  • Martin Dráb Profile Picture
    Martin Dráb 237,965 Most Valuable Professional on at

    I guess you mean that the type of the data source is TableA, but it doesn't necessarily mean that the type of the record is TableA too. F&O supports polymorphism in forms.

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