Auto add date_collected in v2 advisory

Signed-off-by: Keshav Priyadarshi <git@keshav.space>

Author: keshav-space

vulnerabilities/models.py

@@ -2961,9 +2961,15 @@ class AdvisoryV2(models.Model):
     )
 
     date_published = models.DateTimeField(
-        blank=True, null=True, help_text="UTC Date of publication of the advisory"
+        blank=True,
+        null=True,
+        help_text="UTC Date of publication of the advisory",
+    )
+    date_collected = models.DateTimeField(
+        auto_now_add=True,
+        db_index=True,
+        help_text="UTC Date on which the advisory was collected",
     )
-    date_collected = models.DateTimeField(help_text="UTC Date on which the advisory was collected")
 
     original_advisory_text = models.TextField(
         blank=True,

vulnerabilities/pipes/advisory.py

@@ -313,7 +313,6 @@ def insert_advisory_v2(
             "avid": f"{pipeline_id}/{advisory.advisory_id}",
             "summary": advisory.summary,
             "date_published": advisory.date_published,
-            "date_collected": datetime.now(timezone.utc),
             "original_advisory_text": advisory.original_advisory_text,
             "url": advisory.url,
             "precedence": precedence,