Some fixes

src/wirecloud/platform/context/models.py

@@ -31,4 +31,4 @@ class Meta:
         db_table = 'wirecloud_constant'
 
     def __str__(self):
-        return self.concept.concept
+        return self.concept

src/wirecloud/platform/context/utils.py

@@ -97,7 +97,7 @@ def get_constant_context_values():
 
     constants = Constant.objects.all()
     for constant in constants:
-        res[constant.concept.concept] = constant.value
+        res[constant.concept] = constant.value
 
     return res
 

src/wirecloud/platform/static/js/wirecloud/ui/WorkspaceView.js

@@ -87,6 +87,10 @@
     const on_workspace_unload = function on_workspace_unload(workspace) {
         // This must be always the case
         // if (this.model === workspace) {
+        this.model.operators.forEach((operator) => {
+            operator.unload(true);
+        });
+
         this.model = null;
         this.editButton.enabled = false;
         this.editButton.active = false;

src/wirecloud/platform/static/js/wirecloud/wiring/Operator.js

@@ -533,6 +533,21 @@
             return Promise.resolve(this);
         }
 
+        /**
+         * Unload the operator.
+         */
+        unload(onlyv2 = false) {
+            if (!this.loaded) {
+                return;
+            }
+
+            if (onlyv2 && this.meta.macversion <= 1) {
+                return;
+            }
+
+            on_unload.call(this);
+        }
+
         /**
          * @returns {Wirecloud.wiring.Operator}
          */