Ledger dimension vs Default dimension In Dynamics 365 Finance and Operations

In short Ledger dimension it is Main account + default dimension.

So, if you need to replace any attribute value in a given Ledger dimension, do not forget to get a Default dimension first.

LedgerDimensionFacade::getDefaultDimensionFromLedgerDimension(ledgerjournalTrans.LedgerDimension);

Then you can use this old good way.

DimensionDefault newDim = DimensionHelper::setValueToDefaultDimension(hcmEmployment.DefaultDimension, DimensionAttribute::findByName(_dimensionName).RecId, _dimensionValue);

BTW, the opposite thing works like that:

LedgerDimensionFacade::serviceCreateLedgerDimension(ledgerDimensionMainAccount, inventTrans.defaultDimension);

Supporting method

public static DimensionDefault setValueToDefaultDimension(DimensionDefault _dimensionDefault, RefRecId _dimensionAttributeRecId, DimensionValue  _newDimensionValue)

    {

        DimensionAttributeValueSetStorage   dimStorage;

        DimensionDefault                    newDimensionDefault = _dimensionDefault;

        DimensionAttributeValue             dimensionAttributeValue;

        if (_dimensionAttributeRecId)

        {

            dimStorage = DimensionAttributeValueSetStorage::find(_dimensionDefault);

            if (_newDimensionValue)

            {

                dimensionAttributeValue = DimensionAttributeValue::findByDimensionAttributeAndValue(DimensionAttribute::find(_dimensionAttributeRecId), _newDimensionValue, false, true);

                dimStorage.addItem(dimensionAttributeValue);

            }

            else

            {

                dimStorage.removeDimensionAttribute(_dimensionAttributeRecId);

            }

            newDimensionDefault = dimStorage.save();

        }

        return newDimensionDefault;

    }

Bigger usage example

      // replace TransactionType to the one from parameters

        // first we need to get main account and default dimension from the originl transaction ledger dimension 

        mainAccountRecId = LedgerDimensionFacade::getMainAccountRecIdFromLedgerDimension(_ledgerJournalTransOrig.LedgerDimension);

        dimensionDefault = LedgerDimensionFacade::getDefaultDimensionFromLedgerDimension(_ledgerJournalTransOrig.LedgerDimension);

        // then replace this attribute with a new value

        dimensionDefault = mgcDimValueHelper::setDefaultDimensionValue(dimensionDefault, mgcDimensionConstants::TransactionType, LedgerParameters::find().mgcGLDimInvTransSale);

        // get default dimension for main account

        ledgerDimensionMainAccount = LedgerDefaultAccountHelper::getDefaultAccountFromMainAccountRecId(mainAccountRecId);

        // finally combine it with original main account to get a new ledger dimension

        ledgerJournalTrans.OffsetLedgerDimension  = LedgerDimensionFacade::serviceCreateLedgerDimension(ledgerDimensionMainAccount, dimensionDefault);

        ledgerJournalTrans.modifiedField(fieldNum(LedgerJournalTrans, OffsetLedgerDimension));