Files attached to a File Field


Is there a way to tell if a file field has a file attached?

We have a connection to an external file storage. We have business rules that invoke a method on create of a record and on update, if the metadata fields change, but sometimes a user will attach a file to a record without changing other fields.

We would like the business rule to invoke the method if a file has been attached to a file field, but there does not seem to be a way to determine whether or not a file has been attached. File fields aren’t avaliable in business or layout rules.

Is there a way to acheive this? For performance reasons, we would prefer to not run the Java classes unconditionally.

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