fix the bug and add a test

Author: tsullivan

x-pack/legacy/plugins/reporting/export_types/csv/types.d.ts

@@ -6,10 +6,21 @@
 
 import { JobDocPayload, JobParamPostPayload, ConditionalHeaders, RequestFacade } from '../../types';
 
+interface DocValueField {
+  field: string;
+  format: string;
+}
+
+interface SortOptions {
+  order: string;
+  unmapped_type: string;
+}
+
 export interface JobParamPostPayloadDiscoverCsv extends JobParamPostPayload {
   state?: {
     query: any;
-    sort: any[];
+    sort: Array<Record<string, SortOptions>>;
+    docvalue_fields: DocValueField[];
   };
 }
 

x-pack/legacy/plugins/reporting/export_types/csv_from_savedobject/server/lib/generate_csv_search.ts

@@ -80,10 +80,11 @@ export async function generateCsvSearch(
 
   let payloadQuery: QueryFilter | undefined;
   let payloadSort: any[] = [];
+  let docValueFields: any[] = [];
   if (jobParams.post && jobParams.post.state) {
     ({
       post: {
-        state: { query: payloadQuery, sort: payloadSort = [] },
+        state: { query: payloadQuery, sort: payloadSort = [], docvalue_fields: docValueFields },
       },
     } = jobParams);
   }
@@ -115,7 +116,11 @@ export async function generateCsvSearch(
         },
       };
     }, {});
-  const docValueFields = indexPatternTimeField ? [indexPatternTimeField] : undefined;
+
+  if (indexPatternTimeField) {
+    docValueFields = [indexPatternTimeField].concat(docValueFields);
+  }
+
   const searchRequest: SearchRequest = {
     index: esIndex,
     body: {