project list page support for empty database / no projects

Author: jesteria

src/marketplace/templates/marketplace/proj_list.html

@@ -36,13 +36,15 @@ <h4>Filter results</h4>
           {% include 'marketplace/components/filter_checkbox.html' with field_name='projectstatus' field_value='completed' field_text='Completed' is_checked=checked_project_fields.completed %}
         </fieldset>
 
+        {% if project_years %}
         <fieldset class="mt-3" name="since">
           <legend>Posted in or after</legend>
           {# if we make form auto-submit on change, then these should perhaps be anchors. however, as currently implemented, radios perhaps make most sense. #}
           {% for project_year, is_checked in project_years %}
           {% include 'marketplace/components/filter_checkbox.html' with field_name='postedsince' field_value=project_year field_text=project_year field_type='radio' is_checked=is_checked %}
           {% endfor %}
         </fieldset>
+        {% endif %}
 
         <button type="submit"
                 form="projlist"

src/marketplace/views/proj.py

@@ -157,7 +157,7 @@ def project_list_view(request):
             Min('creation_year'),
         ).values()
     )
-    project_years = range(latest_year, (oldest_year - 1), -1)
+    project_years = range(latest_year, (oldest_year - 1), -1) if latest_year and oldest_year else ()
 
     try:
         filter_year = int(request.GET.get('postedsince', ''))