Added a migration to remove most duplicate 'Upload' doc events.

- Legacy-Id: 12098

ietf/submit/migrations/0016_fix_duplicate_upload_docevents.py

@@ -0,0 +1,67 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+import debug                            # pyflakes:ignore
+
+verbose = False
+def note(s):
+    if verbose:
+        print(s)
+
+
+def clean_up_duplicate_upload_docevents(apps, schema_editor):
+    DocEvent = apps.get_model('doc', 'DocEvent')
+    DocHistory = apps.get_model('doc', 'DocHistory')
+
+    def get_dochistory(e):
+        return DocHistory.objects.filter(time__lte=e.time,doc__name=e.doc.name).order_by('-time', '-pk').first()
+
+    def rev(e):
+        if hasattr(e, 'newrevisiondocevent'):
+            return e.newrevisiondocevent.rev
+        else:
+            h = get_dochistory(e)
+            if h:
+                return h.rev
+            else:
+                return "  "
+
+    events = DocEvent.objects.filter(time__gt='2016-09-10', doc__type='draft', desc='Uploaded new revision').order_by('id')
+    docs = set()
+    for e in events:
+        docs.add(e.doc)
+    for doc in docs:
+        note("\n%s" % doc.name)
+        docevents = list(events.filter(doc=doc))
+        prev = docevents[0]
+        for i, event in enumerate(docevents):
+            if rev(event) != rev(prev):
+                note("")
+            if event.time < prev.time:
+                print( "    *** Timestamp discrepancy:")
+            note((u"    %6d  %s  %-20s  %s  %s" % (event.id, event.time, event.by.name[:24], rev(event), event.desc[:64].replace('\n',''), )).encode('utf-8'))
+            if event.by.name == '(System)':
+                for j in range(i+1, len(docevents)):
+                    next = docevents[j]
+                    if rev(next) == rev(event):
+                        note((u"    Deleting event %6d  %s  %-20s  %s" % (event.id, event.time, event.by.name[:24], rev(event), )).encode('utf-8'))
+                        event.delete()
+                        break
+            prev = event
+    return False
+
+def noop(apps, schema_editor):
+    pass
+
+
+class Migration(migrations.Migration):
+    
+    dependencies = [
+        ('submit', '0015_fix_bad_submission_docevents'),
+    ]
+
+    operations = [
+        migrations.RunPython(clean_up_duplicate_upload_docevents, noop)
+    ]