Hi Team,

Could you please let me know what would be the proper way to filter DOM objects?

Example use case, i want to know is an upgrade object with some specific properties is already present to determine whether i should create a new one or update it.

currently using this code:

public static DomInstance GetUpgrade(this UpgradeModule upgradeModule, UpgradeFieldsGeneralValues upgrade)
{
var customerDescriptorId = UpgradeDomDefinition.UpgradeSectionGeneralInfo.FieldDescriptors.CustomerDcpId.ID;
var customerFilter = DomInstanceExposers.FieldValues.DomInstanceField(customerDescriptorId).Equal(upgrade.CustomerDcpId);

var dmaDescriptorId = UpgradeDomDefinition.UpgradeSectionGeneralInfo.FieldDescriptors.DmaId.ID;
var dmaFilter = DomInstanceExposers.FieldValues.DomInstanceField(dmaDescriptorId).Equal(upgrade.DmaId);

var previousVersionDescriptorId = UpgradeDomDefinition.UpgradeSectionGeneralInfo.FieldDescriptors.PreviousVersion.ID;
var previousVersionFilter = DomInstanceExposers.FieldValues.DomInstanceField(previousVersionDescriptorId).Equal(upgrade.PreviousVersion);

var newVersionDescriptorId = UpgradeDomDefinition.UpgradeSectionGeneralInfo.FieldDescriptors.NewVersion.ID;
var newVersionFilter = DomInstanceExposers.FieldValues.DomInstanceField(newVersionDescriptorId).Equal(upgrade.NewVersion);

var filter = customerFilter.AND(dmaFilter).AND(previousVersionFilter).AND(newVersionFilter);
return upgradeModule.DomHelper.DomInstances.Read(filter).FirstOrDefault();
}

as reference i'm using: https://docs.dataminer.services/user-guide/Advanced_Modules/DOM/DOM_examples/DOM_Invoice_app_example.html#readingfiltering-dom-instances

thanks in advance