combine end_time and start_time into timestamp in Logentry

atdb/taskdatabase/migrations/0002_auto_20210129_0739.py

+# Generated by Django 3.1.4 on 2021-01-29 06:39
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('taskdatabase', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name='logentry',
+            old_name='end_time',
+            new_name='timestamp',
+        ),
+        migrations.RemoveField(
+            model_name='logentry',
+            name='start_time',
+        ),
+    ]

atdb/taskdatabase/models.py

@@ -60,8 +60,7 @@ class LogEntry(models.Model):
     wall_clock_time = models.IntegerField(null=True,blank=True)
     url_to_log_file = models.CharField(max_length=100, blank=True, null=True)
     step_name = models.CharField(max_length=30, blank=True, null=True)
-    start_time = models.DateTimeField(blank=True, null=True)
-    end_time = models.DateTimeField(blank=True, null=True)
+    timestamp = models.DateTimeField(blank=True, null=True)
     status = models.CharField(max_length=50,default="defined", blank=True, null=True)
     description = models.CharField(max_length=100, blank=True, null=True)