Cannot use all the fields we've in build in a ES query

[calixteman]

For example:

curl -s -X POST https://buildhub.moz.tools/api/search -d '{"size": 5, "query": {"term": {"build.target": "x86_64-pc-mingw32"}}}'

doesn't return anything.

[bhearsum]

I had a brief look at this and was hoping this would be as simple as:

diff --git a/buildhub/main/search.py b/buildhub/main/search.py
index a4fb60d..add77d6 100644
--- a/buildhub/main/search.py
+++ b/buildhub/main/search.py
@@ -23,16 +23,17 @@ logger = logging.getLogger("buildhub")
 )
 def es_retry(callable, *args, **kwargs):
     return callable(*args, **kwargs)
 
 
 class _Build(InnerDoc):
     id = Keyword()
     date = Date()
+    target = Keyword()
 
 
 class _Source(InnerDoc):
     product = Keyword()
     repository = Keyword()
     tree = Keyword()
     revision = Keyword()

...but that doesn't appear to be the case. Even after injesting new events with this code, I still can't query by build.target.