Added a migration to fix the mext meeting materials names and external links.

- Legacy-Id: 12404

ietf/meeting/migrations/0040_fix_mext_meeting_materials.py

@@ -0,0 +1,77 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+from django.db.utils import IntegrityError
+
+def forward(apps, schema_editor):
+    Group = apps.get_model('group', 'Group')
+    Document = apps.get_model('doc', 'Document')
+    SessionPresentation = apps.get_model('meeting', 'SessionPresentation')
+    #
+    mext = Group.objects.get(acronym='mext')
+    plist = SessionPresentation.objects.filter(session__group=mext)
+    for p in plist:
+        print(p.document_id)
+        name = p.document_id.replace('-dmm', '-mext')
+        try:
+            doc = p.document
+            new = Document.objects.create(
+                time=doc.time,
+                type=doc.type,
+                title=doc.title.replace('DMM', 'MEXT'),
+                group=mext,
+                rev=doc.rev,
+                order=doc.order,
+                external_url=doc.external_url.replace('dmm', 'mext'),
+                name=name,
+            )
+            doc.delete()
+        except Document.DoesNotExist as e:
+            print("%s: %s" % (p.document_id, e))
+        except IntegrityError as e:
+            print("%s: %s" % (p.document_id, e))
+        if not SessionPresentation.objects.filter(document_id=name).exists():
+            p.document_id = name
+            p.save()
+
+def backward(apps, schema_editor):
+    Group = apps.get_model('group', 'Group')
+    Document = apps.get_model('doc', 'Document')
+    SessionPresentation = apps.get_model('meeting', 'SessionPresentation')
+    mext = Group.objects.get(acronym='mext')
+    dmm  = Group.objects.get(acronym='dmm')
+    plist = SessionPresentation.objects.filter(session__group=mext)
+    for p in plist:
+        print(p.document_id)
+        name = p.document_id.replace('-mext', '-dmm')
+        try:
+            doc = p.document
+            old = Document.objects.create(
+                time=doc.time,
+                type=doc.type,
+                title=doc.title.replace('MEXT', 'DMM'),
+                group=dmm,
+                rev=doc.rev,
+                order=doc.order,
+                external_url=doc.external_url.replace('mext', 'dmm'),
+                name=name,
+            )
+            doc.delete()
+        except Document.DoesNotExist as e:
+            print("%s: %s" % (p.document_id, e))
+        except IntegrityError as e:
+            print("%s: %s" % (p.document_id, e))
+        if not SessionPresentation.objects.filter(document_id=name).exists():
+            p.document_id = name
+            p.save()
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('meeting', '0039_auto_20161017_1053'),
+    ]
+
+    operations = [
+        migrations.RunPython(forward, backward)
+    ]