serializers.py 文件源码

def get_ratings(self, obj):
        score = None
        if obj.type == USER_TYPE_DEVELOPER:
            query = Rating.objects.filter(
                tasks__closed=True, tasks__participants=obj, tasks__participation__status=STATUS_ACCEPTED
            ).order_by('criteria')
            details = query.values('criteria').annotate(avg=Avg('score'))
            criteria_choices = dict(Rating._meta.get_field('criteria').flatchoices)
            for rating in details:
                rating['display_criteria'] = criteria_choices[rating['criteria']]
                rating['display_avg'] = rating['avg'] and '{:0,.0f}%'.format(rating['avg']*10)
            avg = query.aggregate(avg=Avg('score'))['avg']
            score = {'avg': avg, 'display_avg': avg and '{:0,.0f}%'.format(avg*10) or None, 'details': details}
        return score