added predecessor_status field now returns 'unknown' if there is not predecessor

atdb/taskdatabase/models.py

@@ -59,7 +59,10 @@ class Task(models.Model):
 
     @property
     def predecessor_status(self):
-        return self.predecessor.status
+        try:
+            return self.predecessor.status
+        except:
+            return "unknown"
 
 class LogEntry(models.Model):
     cpu_cycles = models.IntegerField(null=True,blank=True)

atdb/taskdatabase/templates/taskdatabase/index.html

@@ -80,7 +80,7 @@
         {% include 'taskdatabase/pagination.html' %}
        </div>
     </div>
-    <p class="footer"> Version 1.0.0 (28 oct 2021 - 11:00)
+    <p class="footer"> Version 1.0.0 (28 oct 2021 - 11:30)
 
 </div>