1 files changed, 24 insertions, 0 deletions
diff --git a/ishtar_common/utils_migrations.py b/ishtar_common/utils_migrations.py
index d161c1f29..edbeb5567 100644
--- a/ishtar_common/utils_migrations.py
+++ b/ishtar_common/utils_migrations.py
@@ -1,6 +1,8 @@
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
+import datetime
+
 from django.core.files import File
 import os
 
@@ -112,3 +114,25 @@ def migrate_main_image(apps, app_name, model_name):
         item.skip_history_when_saving = True
         item.save()
 
+
+def m2m_historization_init(obj):
+    hist_values = obj.history_m2m or {}
+    for attr in obj.HISTORICAL_M2M:
+        values = []
+        for value in getattr(obj, attr).all():
+            if not hasattr(value, "history_compress"):
+                continue
+            values.append(value.history_compress())
+        hist_values[attr] = values
+    obj.history_m2m = hist_values
+    for hist in obj.history.all():
+        hist.history_m2m = hist_values
+        d = hist.history_date
+        date = datetime.datetime(year=d.year, month=d.month, day=d.day,
+                                 hour=d.hour, minute=d.minute, second=d.second,
+                                 microsecond=d.microsecond)
+        hist.history_date = date
+        hist.last_modified = date
+        hist.save()
+    obj.skip_history_when_saving = True
+    obj.save()