Merge pull request #5326 from akvo/fix-invalid-project-created-at-date

Work around for invalid project.created_at timezone

akvo/rest/serializers/project.py

@@ -14,7 +14,7 @@
 from timeout_decorator import timeout
 
 from akvo.rsr.models import Project, ProjectUpdate, IndicatorPeriodData
-from akvo.utils import get_thumbnail
+from akvo.utils import get_thumbnail, make_safe_timezone_aware_date
 from akvo.rsr.models.project_thumbnail import get_cached_thumbnail
 from akvo.rsr.usecases.iati_validation import schedule_iati_activity_validation
 from . import OrganisationBasicSerializer
@@ -80,6 +80,7 @@ class ProjectSerializer(BaseRSRSerializer):
     iati_profile_url = serializers.SerializerMethodField()
     path = serializers.SerializerMethodField()
     uuid = serializers.ReadOnlyField()
+    created_at = serializers.SerializerMethodField()
 
     class Meta:
         model = Project
@@ -136,6 +137,14 @@ def get_iati_profile_url(self, obj):
     def get_path(self, project: Project):
         return str(project.path)
 
+    def get_created_at(self, project: Project):
+        """
+        This is a work around to silence the "Invalid datetime for the timezone
+        Europe/Stockholm" which has appeared several times and not yet known
+        why.
+        """
+        return make_safe_timezone_aware_date(project.created_at)
+
     def update(self, project: Project, validated_data: dict):
         if "contributes_to_project" in validated_data:
             parent = validated_data['contributes_to_project']

akvo/utils/__init__.py

@@ -6,7 +6,6 @@
 
 # utility functions for RSR
 from collections import namedtuple
-from datetime import datetime
 import hashlib
 import inspect
 import json
@@ -569,3 +568,18 @@ def __init__(self, real):
 
     def __getattr__(self, attr):
         return getattr(self._real, attr)
+
+
+def make_safe_timezone_aware_date(d):
+    '''
+    If datetime is naive and is an invalid datetime of current timezone,
+    then assume datetime is in UTC and convert it to a datetime of current
+    timezone.
+    '''
+    if not timezone.is_naive(d):
+        return d
+    try:
+        return timezone.make_aware(d, timezone.get_current_timezone())
+    except pytz.InvalidTimeError:
+        date_utc = timezone.make_aware(d, timezone.utc)
+        return date_utc.astimezone(timezone.get_current_timezone())