No Location header when primary key is not specified in select=

[steve-chavez]

psql -c 'CREATE TABLE test_bulk(id serial primary key, code text)'

curl -i -X POST -d '{"code":42}' \
-H 'Prefer:return=representation' \
-H "Content-type: application/json" \
"localhost:3000/test_bulk?select=code"

#HTTP/1.1 201 Created
#Transfer-Encoding: chunked
#Date: Sat, 04 Aug 2018 17:58:57 GMT
#Server: postgrest/0.5.0.0 (fa1e92f)
#Content-Type: application/json; charset=utf-8
#Content-Range: */*

#[{"code":"42"}]

curl -i -X POST -d '{"code":42}' \
-H 'Prefer:return=representation' \
-H "Content-type: application/json" \
"localhost:3000/test_bulk?select=id,code"

#HTTP/1.1 201 Created
#Transfer-Encoding: chunked
#Date: Sat, 04 Aug 2018 18:00:44 GMT
#Server: postgrest/0.5.0.0 (fa1e92f)
#Location: /test_bulk?id=eq.2
#Content-Type: application/json; charset=utf-8
#Content-Range: */*

#[{"id":2,"code":"42"}]