[API] Generator: body for bulk, msearch and msearch_template is specific

Author: picandocodigo

elasticsearch-api/utils/thor/templates/method.erb

@@ -53,15 +53,20 @@ module Elasticsearch
 <%- else -%>
   <%= '  '*(@namespace_depth+4) %>params = {}
 <%- end -%>
-<%= '  '*(@namespace_depth+4) %>body   = <%= @spec['body'].nil? ? 'nil' : 'arguments[:body]' %>
 <%# Perform request %>
+<%= '  '*(@namespace_depth+4) %>body   = <%= @spec['body'].nil? ? 'nil' : 'arguments[:body]' %>
 <% if ['bulk', 'msearch', 'msearch_template'].include? @method_name %>
-  <%= '  '*(@namespace_depth+3) %>  perform_request(method, path, params, body, {"Content-Type" => "application/x-ndjson"}).body
+  if body.is_a? Array
+    payload = Utils.__bulkify(body)
+  else
+    payload = body
+  end
+
+  <%= '  '*(@namespace_depth+3) %>  perform_request(method, path, params, payload, {"Content-Type" => "application/x-ndjson"}).body
 <% else %>
   <%= '  '*(@namespace_depth+3) %>perform_request(method, path, params, body).body
 <% end %>
 <%= '  '*(@namespace_depth+3) %>end
-
 <%# Method, path, params, body  -%>
 
 <%= '  '*(@namespace_depth+3) %># Register this action with its valid params when the module is loaded.