corrected functionality from the stat_contributors_graph

app/assets/javascripts/common_d3/index.js

 export {
   select,
   selectAll,
+  event,
 } from 'd3-selection';
 
 export {

app/assets/javascripts/graphs/stat_graph_contributors.js

@@ -84,9 +84,12 @@ export default (function() {
     return _.each(author_commits, (function(_this) {
       return function(d) {
         _this.redraw_author_commit_info(d);
-        $(_this.authors[d.author_name].list_item).appendTo("ol");
-        _this.authors[d.author_name].set_data(d.dates);
-        return _this.authors[d.author_name].redraw();
+        if (_this.authors[d.author_name] != null) {
+          $(_this.authors[d.author_name].list_item).appendTo("ol");
+          _this.authors[d.author_name].set_data(d.dates);
+          return _this.authors[d.author_name].redraw();
+        }
+        return '';
       };
     })(this));
   };
@@ -108,10 +111,14 @@ export default (function() {
   };
 
   ContributorsStatGraph.prototype.redraw_author_commit_info = function(author) {
-    var author_commit_info, author_list_item;
-    author_list_item = $(this.authors[author.author_name].list_item);
-    author_commit_info = this.format_author_commit_info(author);
-    return author_list_item.find("span").html(author_commit_info);
+    var author_commit_info, author_list_item, $author;
+    $author = this.authors[author.author_name];
+    if ($author != null) {
+      author_list_item = $(this.authors[author.author_name].list_item);
+      author_commit_info = this.format_author_commit_info(author);
+      return author_list_item.find("span").html(author_commit_info);
+    }
+    return '';
   };
 
   return ContributorsStatGraph;

app/assets/javascripts/graphs/stat_graph_contributors_graph.js

@@ -12,6 +12,7 @@ import {
   area as d3Area,
   brushX as d3BrushX,
   timeParse as d3TimeParse,
+  event as d3Event,
 } from '../common_d3/index';
 
 const extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; };
@@ -166,7 +167,7 @@ export const ContributorsMasterGraph = (function(superClass) {
   };
 
   ContributorsMasterGraph.prototype.create_brush = function() {
-    return this.brush = d3BrushX(this.x).on("end", this.update_content);
+    return this.brush = d3BrushX(this.x).extent([[this.x.range()[0], 0], [this.x.range()[1], this.height]]).on("end", this.update_content);
   };
 
   ContributorsMasterGraph.prototype.draw_path = function(data) {
@@ -178,7 +179,12 @@ export const ContributorsMasterGraph = (function(superClass) {
   };
 
   ContributorsMasterGraph.prototype.update_content = function() {
-    ContributorsGraph.set_x_domain(this.brush.empty() ? this.x_max_domain : this.brush.extent());
+    // d3Event.selection replaces the function brush.empty() calls
+    if (d3Event.selection != null) {
+      ContributorsGraph.set_x_domain(d3Event.selection.map(this.x.invert));
+    } else {
+      ContributorsGraph.set_x_domain(this.x_max_domain);
+    }
     return $("#brush_change").trigger('change');
   };
 
@@ -260,7 +266,8 @@ export const ContributorsAuthorGraph = (function(superClass) {
   };
 
   ContributorsAuthorGraph.prototype.create_svg = function() {
-    this.list_item = document.querySelectorAll('.person')[0];
+    var persons = document.querySelectorAll('.person');
+    this.list_item = persons[persons.length - 1];
     return this.svg = d3Select(this.list_item).append("svg").attr("width", this.width + this.MARGIN.left + this.MARGIN.right).attr("height", this.height + this.MARGIN.top + this.MARGIN.bottom).attr("class", "spark").append("g").attr("transform", "translate(" + this.MARGIN.left + "," + this.MARGIN.top + ")");
   };