Searching by _source on a specific resource type will return matches on all resource types.

[epeartree]

Description
Searching by the _source parameter on a specific resource will return source matches for all resources.

To Reproduce

1. Post Patient with: “meta”: { “source”: “source” }
2. Post Condition with: “meta”: { “source”: “source” }
3. request: GET localhost:8000/Condition?_source=source

Observed results: Even though we are attempting a GET on Condition resources, we get back both the Condition resource AND the Patient resource.

Expected behavior
For the search to return only Condition resources matching the provided source.