See if all attributes has value missing

You can start by using NullAttributeCounter, it generates a table which tells you which attributes have null values (and even how many)

Hi ​@stinah ,

Do you need to check if all the selected 50+ attributes are missing for each record, or in entire input table?

you can use NullAttributeMapper > select all attributes or only the one you want > then you can use pythoncaller, to check if all those expose attributes are null dynamically.

Great

Perhaps I frased the question wrong. The goal is to get information if the attributes name has changed from the datasource when I download the data through a url. As I have the workspace set now I have a AttributeExposer that I import attribute name from an earlier downloaded file from the used url for the datasource and set that as the name for the attributes. But sometimes the organisation that is responsible for the datasource that I download change the attribute names - if that is the case all the attribute that i have in my written file is missing value (or null). So I wish to get the information when all the attribute that I written to a file has the value missing och null because the attribute name has changed and doesn’t exist anymore in the datsource.
So my question is can I get the information if multiple attribute that I have exposed but doesn’t really exists in the datasource anymore has value missing or null or even better is it a way to automatically always expose the correct attribute that the datasource has?
 

Hi ​@stinah 

You could use a SchemaScanner and ChangeDetector to detect missing attributes or changes in attribute names from the source dataset. 

There is an article that covers how to set up this workflow: Dynamic Workflows: Dealing with Schema Drift

I hope this helps!