from rest_framework import serializers from core.apps.eggs.models import History class HistorySerializer(serializers.ModelSerializer): avatar = serializers.SerializerMethodField() class Meta: model = History fields = [ "id", "content_type", "object_id", "action", "avatar", "timestamp", "created_by", "created_who", "comment", "reason", ] def get_avatar(self, obj): if obj.avatar and hasattr(obj.avatar, "url"): return obj.avatar.url return None