I have a problem on the query on my test class. I have put AssetId__r.Product2Id on the 1st query, and put Product2Id in the Asset query. but still the error persist. as the error says it needs Asset.Product2 which is an SObject , not a field and I am lost on how to fix this error. does anyone encounter this error before? please I need your help.
would be easier if you'd post the actual query.
You probably have something like that in your code:
String name = myObject.AssetId__r.Product2.Name;
but the query SELECT AssetId__r.Product2Id, ... FROM MyTable WHERE ...
So what you can change is put more product fields in the query. You can go up to 5 dots "up".
SELECT AssetId__r.Product2.Id,
AssetId__r.Product2.Name,
AssetId__r.Product2.ProductCode
FROM myObject
WHERE ...
It will work and then Apex that uses it can treat AssetId__r.Product2
as a normal Product2
object, as if it was queried separately. It'll have Id, Name, ProductCode
fields set.
The query is also "safe". If AssetId__c is null or Product2Id is null - it'll still execute OK. You'll have to do null checks in Apex (or in query's WHERE clause)