Handle case of filterlist with no items

Author: programcsharp

Griddly/Scripts/griddly.js

@@ -776,31 +776,39 @@
                 var self = this;
 
                 var checkbox = $(el).parents(".filter-content").find("input:first");
-                var filter = checkbox.data("griddly-filter");
 
-                var selector = ".dropdown-menu li" + (!filter.data("griddly-filter-ismultiple") ? ":not(.griddly-list-group-header)" : "");
-
-                $(el).click(function ()
+                if (checkbox.length)
                 {
-                    $(this).parents(".filter-content").find(selector).addClass("griddly-filter-selected");
-                    $(this).parents(".filter-content").find("input").prop("checked", true).first().change();
-                });
+                    var filter = checkbox.data("griddly-filter");
+
+                    var selector = ".dropdown-menu li" + (!filter.data("griddly-filter-ismultiple") ? ":not(.griddly-list-group-header)" : "");
+
+                    $(el).click(function ()
+                    {
+                        $(this).parents(".filter-content").find(selector).addClass("griddly-filter-selected");
+                        $(this).parents(".filter-content").find("input").prop("checked", true).first().change();
+                    });
+                }
             }, this));
 
             $(".griddly-filters-inline .filter-content .griddly-clear", this.$element).each($.proxy(function (i, el)
             {
                 var self = this;
 
                 var checkbox = $(el).parents(".filter-content").find("input:first");
-                var filter = checkbox.data("griddly-filter");
 
-                var selector = ".dropdown-menu li" + (!filter.data("griddly-filter-ismultiple") ? ":not(.griddly-list-group-header)" : "");
-
-                $(el).click(function ()
+                if (checkbox.length)
                 {
-                    $(this).parents(".filter-content").find(selector).removeClass("griddly-filter-selected");
-                    $(this).parents(".filter-content").find("input").prop("checked", false).first().change();
-                });
+                    var filter = checkbox.data("griddly-filter");
+
+                    var selector = ".dropdown-menu li" + (!filter.data("griddly-filter-ismultiple") ? ":not(.griddly-list-group-header)" : "");
+
+                    $(el).click(function ()
+                    {
+                        $(this).parents(".filter-content").find(selector).removeClass("griddly-filter-selected");
+                        $(this).parents(".filter-content").find("input").prop("checked", false).first().change();
+                    });
+                }
             }, this));
         },
 

Griddly/Views/Shared/Griddly/GriddlyFilterInline.cshtml

@@ -41,7 +41,7 @@
                 }
                 else
                 {
-                <a class="btn btn-link btn-xs filter-trigger">
+                <a class="btn btn-xs @(filterList == null || filterList.Items.Count > 0 ? "btn-link filter-trigger" : "disabled")">
                     <span class="griddly-filter-display">
                         @if (filterBox != null)
                         {
@@ -105,7 +105,10 @@
                             }
                         }
                     </span>
+                    @if (filterList == null || filterList.Items.Count > 0)
+                    {
                     <span class="caret"></span>
+                    }
                 </a>
                 <div class="filter-content">
                     @if (filterBox != null)