DocIDQuery - How to query a single document by DocID

[prabhatsharma]

Bleve used to have a DocIDQuery, Is that not built on purpose in bluge. What is the recommendation for querying a specific document by DocID?

[mschoch]

So, in Bluge we removed the DocIDQuery because we want to emphasize that there isn't really anything special about the _id field. It is just a field in which all values are unique. To search for a document using it's identifier, you should simply create a term query for the ID, and scope it to only search the _id field.

Background: The top-level Bluge API makes it easy to create documents, all which have a field named _id, and we do this because it works well for many use cases. However, the internals of Bluge were designed to not assume/require this field. Also, one of the design constraints of Bluge was to have a smaller API surface area where possible (avoid multiple ways to do the same thing). Given both of these, it made sense to me to remove it. In summary I would say that we want Bluge developers to not think of ID's as special, and instead think of them like just another field.