#3594 updates the article jump link to use a distinct set of elements…

… rather than using stages, will also reduce the number of queries.

src/submission/models.py

@@ -1679,6 +1679,17 @@ def get_subject_area(self):
     def workflow_stages(self):
         return core_models.WorkflowLog.objects.filter(article=self)
 
+    def distinct_workflow_elements(self):
+        workflow_element_ids = core_models.WorkflowLog.objects.filter(
+            article=self,
+        ).values_list(
+            'element'
+        ).distinct()
+
+        return core_models.WorkflowElement.objects.filter(
+            pk__in=[element_id[0] for element_id in workflow_element_ids]
+        )
+
     @property
     def current_workflow_element(self):
         try:

src/templates/admin/elements/article_jump.html

@@ -6,10 +6,9 @@
 {% if editor or section_editor %}
     <div class="small expanded button-group">
         <a class="button" href="{% url 'review_unassigned_article' article.pk %}">Editor Assignment</a>
-        {% for stage in article.workflow_stages %}
-
-            <a class="button{% if stage.element.element_name == 'review' and article.stage == 'Unassigned' %} disabled{% endif %}"
-               href="{% url stage.element.jump_url article.pk %}">{{ stage.element.element_name|capfirst }}</a>
+        {% for element in article.distinct_workflow_elements %}
+            <a class="button{% if element.element_name == 'review' and article.stage == 'Unassigned' %} disabled{% endif %}"
+               href="{% url element.jump_url article.pk %}">{{ element.element_name|capfirst }}</a>
         {% endfor %}
         <button class="button" type="button" data-toggle="more-dropdown">Logs, Documents and More</button>