Python rest_framework.serializers 模块，ImageField() 实例源码

def _postsave(self, validated_data, instance):
        for field, value in validated_data.items():
            # Optimize images with TinyPNG
            if type(self.Meta.model._meta.get_field(field)) == models.models.ImageField:
                value = getattr(instance, field)
                filename = value.name
                content = value.read()
                if not content:
                    setattr(instance, field, None)
                    continue
                image = shrinkImageFromData(content, filename, settings=getattr(self.Meta.model, 'tinypng_settings', {}).get(field, {}))
                image.name = self.Meta.model._meta.get_field(field).upload_to(instance, filename)
                setattr(instance, field, image)
        return instance

def test_should_image_convert_string():
    assert_conversion(serializers.ImageField, graphene.String)

def to_representation(self, obj):
        if isinstance(obj,UserProfile):
            return super(UserProfileSerializer,self).to_representation(obj)
        serializer = TokenSerializer(obj)
        return serializer.data

# class ScoreSerializer(serializers.ModelSerializer):
#     UserId = serializers.IntegerField(source='GiverPersonId_id',read_only=True) #Read olurken hangi user in verdigini anlamak icin kullanilir
#     Score = serializers.IntegerField(source='Point')
#     Name = serializers.CharField(source='GiverPersonId.user.first_name',read_only=True)
#     Image = serializers.ImageField(source='GiverPersonId.Photo', max_length=None, use_url=True, read_only=True)
#     class Meta(object):
#         model = Score
#         fields = ('Score','UserId','Name','Image')
#     def create(self, validated_data):
#         taker = self.context['view'].kwargs['pk']
#         score = Score.objects.create(TakerPersonId_id=taker ,GiverPersonId_id=self.context['request'].user.id, **validated_data)
#         scores = Score.objects.filter(TakerPersonId_id=taker)
#         total = 0.0
#         for score in scores:
#             total += score.Point
#         avarage_score =  total / len(scores)
#         user = UserProfile.objects.get(pk=taker)
#         user.Score = avarage_score
#         user.save()
#         return {'IsSuccess':True,'context':''}
#     def to_representation(self, obj):
#         if isinstance(obj,Score):
#             return super(ScoreSerializer,self).to_representation(obj)
#         serializer = ResultSerializer(obj)
#         return serializer.data