Fix #426: Added "Clear cache" button to Analyze view.

This forces recomputing the materialized view.

genome_designer/main/static/js/variants_table_component.js

@@ -84,6 +84,10 @@ gd.VariantsTableComponent = Backbone.View.extend({
     $('#gd-filter-field-select-btn').click(
             _.bind(this.handleShowFieldSelect, this));
 
+    // Decorate force refresh materialized view.
+    $('#gd-filter-force-refresh-btn').click(
+        _.bind(this.handleForceRefreshMaterializedView, this));
+
     // Manually handle error alert close.
     $('#gd-snp-filter-error-close-btn').click(
         _.bind(this.handleErrorAlertClose, this));
@@ -232,6 +236,18 @@ gd.VariantsTableComponent = Backbone.View.extend({
     })
   },
 
+  /** Forces refereshing the materialized view. */
+  handleForceRefreshMaterializedView: function() {
+    var requestData = {
+      'refGenomeUid': this.model.get('refGenomeUid'),
+    };
+    $.post('/_/variants/invalidate_materialized_view', requestData,
+        _.bind(function() {
+            this.renderDatatable();
+        }, this));
+
+  },
+
   /**
    * Hides the alert box.
    *
@@ -362,6 +378,8 @@ gd.VariantsTableComponent = Backbone.View.extend({
   handleRefreshMaterializedView: function(onSuccess) {
     this.setUIStartLoadingState();
 
+    $('#gd-datatable-hook').empty();
+
     // Show special message indicating this initial load might be a bit long.
     $('#gd-datatable-hook').append(
         '<div id="gd-refresh-materialized-view-msg" ' +

genome_designer/main/templates/controls/variant_filter_controls.html

@@ -32,6 +32,12 @@
               Fields...
             </button>
           </div>
+          <div class="btn-group">
+            <button id="gd-filter-force-refresh-btn" class="btn btn-default gd-btn-with-margins"
+                title="Views are cached for speed but may become stale. Click to force refresh.">
+              Clear Cache
+            </button>
+          </div>
         </div>
       </div>
     </div>

genome_designer/main/xhr_handlers.py

@@ -1048,6 +1048,20 @@ def is_materialized_view_valid(request):
     return HttpResponse(response_data, content_type='application/json')
 
 
+@login_required
+@require_POST
+def invalidate_materialized_view(request):
+    """Checks whether the materialized view is valid for this ReferenceGenome.
+    """
+    ref_genome_uid = request.POST.get('refGenomeUid')
+    reference_genome = get_object_or_404(ReferenceGenome,
+                project__owner=request.user.get_profile(),
+                uid=ref_genome_uid)
+    reference_genome.invalidate_materialized_view()
+    response_data = json.dumps({})
+    return HttpResponse(response_data, content_type='application/json')
+
+
 @login_required
 @require_GET
 def get_ref_genomes(request):

genome_designer/urls.py

@@ -112,6 +112,8 @@
             'main.xhr_handlers.export_variants_as_csv'),
     url(r'^_/variants/is_materialized_view_valid$',
             'main.xhr_handlers.is_materialized_view_valid'),
+    url(r'^_/variants/invalidate_materialized_view$',
+            'main.xhr_handlers.invalidate_materialized_view'),
     url(r'^_/variants/delete$',
         'main.xhr_handlers.variant_sets_delete'),
     url(r'^_/variants/save_filter$',