favorite
<http://stackoverflow.com/questions/39898978/methodfield-containing-serialized-object-does-not-return-proper-objects-methodf#>
I have two serializers like this.
class CourseSerializer(serializers.ModelSerializer):
pk = serializers.IntegerField(read_only=True)
name = serializers.CharField(required=True, max_length=30,
allow_blank=False)
chapters = serializers.SerializerMethodField()
def get_chapters(self, obj):
queryset = Chapter.objects.all().filter(course=obj.pk)
serializer_class = ChapterSerializer(queryset, many=True)
return serializer_class.data
class ChapterSerializer(serializers.ModelSerializer):
pk = serializers.IntegerField(read_only=True)
name = serializers.CharField(required=True, max_length=30,
allow_blank=False)
course = serializers.StringRelatedField()
cards_count = serializers.SerializerMethodField()
cards_learned_count = serializers.SerializerMethodField()
cards_still_to_go = serializers.SerializerMethodField()
cards_not_learned = serializers.SerializerMethodField()
def get_cards_learned_count(self, obj):
user = None
request = self.context.get("request")
if request and hasattr(request, "user"):
user = request.user
queryset = Card.objects.all().filter(chapter=obj.pk)
card_count = 0
for q in queryset:
card_detail = UserCardDetail.objects.all().filter(card=q,
user=user, learned=True)
card_detail.count()
card_count += card_detail.count()
return card_count
Now when I get the course serializer instead of getting the proper values
in the chapter field, I get zeroes, but when I call the chapter serializer
I get the right values.
I noticed that the MethodField works with obj - however shouldn't that be
passed already?
Is there something extra I have to pass to the chapters field?
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