Bugfix: Reload version attr in OCC

taiga/base/utils/db.py

@@ -27,3 +27,13 @@ def get_typename_for_model_class(model:object, for_concrete_model=True) -> str:
         model = model._meta.proxy_for_model
 
     return "{0}.{1}".format(model._meta.app_label, model._meta.model_name)
+
+
+def reload_attribute(model_instance, attr_name):
+    """Fetch the stored value of a model instance attribute.
+
+    :param model_instance: Model instance.
+    :param attr_name: Attribute name to fetch.
+    """
+    qs = type(model_instance).objects.filter(id=model_instance.id)
+    return qs.values_list(attr_name, flat=True)[0]

taiga/projects/occ/mixins.py

@@ -18,6 +18,7 @@ from django.db import models
 from django.utils.translation import ugettext_lazy as _
 
 from taiga.base import exceptions as exc
+from taiga.base.utils import db
 
 
 class OCCResourceMixin(object):
@@ -37,6 +38,11 @@ class OCCResourceMixin(object):
 
         super().pre_save(obj)
 
+    def post_save(self, obj, created=False):
+        super().post_save(obj, created)
+        if not created:
+            obj.version = db.reload_attribute(obj, 'version')
+
 
 class OCCModelMixin(models.Model):
     """