add debug feature and minor tweaks to es integration

es.js

@@ -243,10 +243,10 @@ function elasticSearchQuery(params) {
     }
 
     // paging (number of results, and start cursor)
-    if (options.from) {
+    if (options.from !== undefined) {
         qs["from"] = options.from
     }
-    if (options.page_size) {
+    if (options.page_size !== undefined) {
         qs["size"] = options.page_size
     }
 

jquery.reportview.js

@@ -100,7 +100,11 @@ function theReportview(options) {
      */
 
     // the reportview object to be appended to the page
-    var thereportview = '<div class="reportview"><svg></svg></div>';
+    var thereportview = '<div class="reportview"><svg></svg>'
+    if (options.debug) {
+        thereportview += "<div class='reportview_debug'><textarea style='width: 100%; height: 200px'></textarea></div>"
+    }
+    thereportview += '</div>';
     return thereportview
 }
 
@@ -287,6 +291,9 @@ function renderMultiBar(params) {
             // to the must filter
             "fixed_filters" : false,
 
+            // size of result set
+            "page_size" : 0,
+
             ///// internal state monitoring /////////////////////////////
 
             // these are used internally DO NOT USE

rv_example.html

@@ -101,6 +101,7 @@
 
     $('#report-view-bar-facet').each(function() {
         $(this).report({
+            debug: true,
             type: "multibar",
             search_url: "http://localhost:9200/doaj/article/_search",
             facets: [