Github user jaydoane commented on the pull request:
https://github.com/apache/couchdb-couch-replicator/pull/12#issuecomment-118463246
It seems like the fundamental issue is that "null" is a string, but we're
expecting an array. My inclination would be to return a response code 400 with
the payload {"error":"parameter \`doc_ids\` must be an array"}.
To make this work, we presumably change the function clause to this:
```
convert_options([{<<"doc_ids">>, V} | _R]) when not is_list(V) ->
throw({bad_request, <<"parameter `doc_ids` must be an array">>});
```
but unfortunately, this also requires adding this additional try clause to
chttpd_misc:handle_replicate_req:
```
{bad_request, Reason} ->
send_json(Req, 400, {[{error, Reason}]});
```
to avoid sending the client a 500 try_clause error.
Does this seem like the correct approach?
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