GetMany doesn't detect default index and type from generic T parameter

[oguzhaneren]

NEST/Elasticsearch.Net version: 2.3.1

Elasticsearch version: 2.32

Description of the problem including expected versus actual behavior:

When i call GetMany method, nest thrown exception like below:
Request:

_elasticClient.GetMany(taskIds)

Exception:

# FailureReason: BadResponse when trying to POST http://localhost:9200/_mget
# Audit trail of this API call:
 - BadResponse: Node: http://localhost:9200/ Took: 00:00:00.0414999
# ServerError: ServerError: 400Type: action_request_validation_exception 
Reason: "Validation Failed: 1: index is missing for doc 0;2: 
index is missing for doc 1;3:

But when I add defaultIndex and type to GetMany call everythink is ok.

 _elasticClient.GetMany(taskIds),index:_elasticClient.ConnectionSettings.DefaultIndex,type:"task"]);

[russcam]

Hey @oguzhaneren, thanks for submitting this, this is a bug.

When index and type are not specified (null values), the index and type should be inferred from the type T on client.GetMany<T>().

[gmarz]

Bumped to 2.3.3.

[russcam]

Fixed in 2.x with 4b3744b

Forward ported to 5.x in fe16bb7