def get_extra_context(self, request, instance):
related_changes = ObjectChange.objects.restrict(
request.user, 'view').filter(
request_id=instance.request_id).exclude(pk=instance.pk)
related_changes_table = tables.ObjectChangeTable(
data=related_changes[:50], orderable=False)
objectchanges = ObjectChange.objects.restrict(
request.user, 'view').filter(
changed_object_type=instance.changed_object_type,
changed_object_id=instance.changed_object_id,
)
next_change = objectchanges.filter(
time__gt=instance.time).order_by('time').first()
prev_change = objectchanges.filter(
time__lt=instance.time).order_by('-time').first()
if not instance.prechange_data and instance.action in [
'update', 'delete'
] and prev_change:
non_atomic_change = True
prechange_data = prev_change.postchange_data
else:
non_atomic_change = False
prechange_data = instance.prechange_data
if prechange_data and instance.postchange_data:
diff_added = shallow_compare_dict(
prechange_data or dict(),
instance.postchange_data or dict(),
exclude=['last_updated'],
)
diff_removed = {x: prechange_data.get(x)
for x in diff_added} if prechange_data else {}
else:
diff_added = None
diff_removed = None
return {
'diff_added': diff_added,
'diff_removed': diff_removed,
'next_change': next_change,
'prev_change': prev_change,
'related_changes_table': related_changes_table,
'related_changes_count': related_changes.count(),
'non_atomic_change': non_atomic_change
}
def get(self, request, pk):
objectchange = get_object_or_404(self.queryset, pk=pk)
related_changes = ObjectChange.objects.restrict(
request.user, 'view').filter(
request_id=objectchange.request_id).exclude(pk=objectchange.pk)
related_changes_table = tables.ObjectChangeTable(
data=related_changes[:50], orderable=False)
objectchanges = ObjectChange.objects.restrict(
request.user, 'view').filter(
changed_object_type=objectchange.changed_object_type,
changed_object_id=objectchange.changed_object_id,
)
next_change = objectchanges.filter(
time__gt=objectchange.time).order_by('time').first()
prev_change = objectchanges.filter(
time__lt=objectchange.time).order_by('-time').first()
if prev_change:
diff_added = shallow_compare_dict(
prev_change.object_data,
objectchange.object_data,
exclude=['last_updated'],
)
diff_removed = {
x: prev_change.object_data.get(x)
for x in diff_added
}
else:
# No previous change; this is the initial change that added the object
diff_added = diff_removed = objectchange.object_data
return render(
request, 'extras/objectchange.html', {
'objectchange': objectchange,
'diff_added': diff_added,
'diff_removed': diff_removed,
'next_change': next_change,
'prev_change': prev_change,
'related_changes_table': related_changes_table,
'related_changes_count': related_changes.count()
})