I want to show ProductImageSerializer
in the browsable API. But I got this error:
UnicodeDecodeError at /api/product_images/
'utf-8' codec can't decode byte 0xff in position 0: invalid start byte
Unicode error hint
The string that could not be encoded/decoded was: �����
Here's my models.py
:
class ProductImage(models.Model):
product = models.ForeignKey(Product, on_delete=models.CASCADE)
image = models.ImageField(upload_to='product_images', width_field=None, height_field=None,
max_length=250)
default = models.BooleanField(verbose_name='Default Picture', default=False)
def __str__(self):
return '%s - %s' % (self.product.product_id, self.default)
Here's my serializers.py
:
class ProductImageSerializer(serializers.ModelSerializer):
product = serializers.PrimaryKeyRelatedField(many=False, queryset=Product.objects.all())
class Meta:
model = ProductImage
fields = ['id', 'product', 'image', 'default']
def to_representation(self, instance):
if self.context['request'].method == 'GET':
product = ProductSerializer(instance.product, many=False, context=self.context).data
data = {
'id': instance.id,
'product': product,
'image': instance.image,
'default': instance.default,
}
return data
return Serializer.to_representation(self, instance)
Here's my views.py
:
class ProductImageView(viewsets.ModelViewSet):
queryset = ProductImage.objects.all()
serializer_class = ProductImageSerializer
I think from what I've searched on several StackOverflow posts is that the problem occurs because of the image
field.
Here's the screenshot when I removed image
field from to_representation
function in serializers.py
:
What should I add or edit in ProductImageSerializer
to be able to show the image
field properly?
try
instance.image.url instead of instance.image
and for full url use
self.context['request'].build_absolute_uri(instance.image.url)
after reading all your code you can do this also
class ProductImageSerializer(serializers.ModelSerializer):
product = ProductSerializer()
class Meta:
model = ProductImage
fields = ['id', 'product', 'image', 'default']
# remove to_representation function
and also you can show images related to product in new key 'images'
# in your product serializer it will be like this
class ProductImageSerializer(serailizers.ModelSerializer):
class Meta:
model = ProductImage
fields = ['id', 'image', 'default']
class ProductSerializer(serializers.ModelSerilaizer):
images = ProductImageSerializer(many=True)
# should send many = True as it may be more than image related to every product
class Meta:
model = Product
fields = [....., 'images']
you can also user SerializerMethodField to get images as a list of string
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