I've just recently started using Hibernate Search, and I'm trying to figure out how I might go about indexing a single class into multiple indexes with slightly different information. Each index has a concept of "uniqueness" (@DocumentId), but the field needs to be different for each index. My initial reaction is that a single class can't support this. Is that correct?

So I have a single entity Foo that needs to be indexed in both index A and index B. Foo has multiple fields, including version and revision. Index A sees Foo as unique based on its version number. Index B sees Foo as unique based on its revision number.

I'm interested in any recommendations as to how I might go about this. I was thinking of some kind of inheritance, but that hasn't worked for me yet. I'm using a MySQL database, if it makes any difference.

Thanks,
Clay

Hi,

indexing the same class into two different indexes is not possible. However, you might not have to. If your usecase is to index certain fields of entity in multiple ways, just use @Fields. This annotation allows you to index the same field multiple times using for example different Analyzers. Or just write your own Field- or ClassBRridge. Doing so will also allow you to control exactly which fields are added to the Lucene document.

At query time you can then just decide yourself which fields to query.

--Hardy