'DemoAppProductUpdateDestroySerializer' object has no attribute 'get_image' - django

Question

'DemoAppProductUpdateDestroySerializer' object has no attribute 'get_image'.
i am getting error on 'DemoAppProductUpdateDestroySerializer' object has no attribute 'get_image'. any help, would be appreciated.
'DemoAppProductUpdateDestroySerializer' object has no attribute
'get_image'
models.py
class Product(models.Model):
title = models.CharField(max_length=30)
slug= models.SlugField(blank=True, null=True)
sku = models.CharField(max_length=30)
description = models.TextField(max_length=200, null=True, blank=True)
instruction = models.TextField(max_length=200, null=True, blank=True)
price = models.DecimalField(decimal_places=2, max_digits= 10,)
discount_price= models.DecimalField(decimal_places=2, max_digits= 10, null=True, blank=True)
brand = models.ForeignKey("Brand", null=True, blank=True, on_delete=models.CASCADE)
waist = models.ForeignKey("Waist", null=True, blank=True, on_delete=models.CASCADE)
occasion = models.ForeignKey("Occasion", null=True, blank=True, on_delete=models.CASCADE)
style = models.ForeignKey("Style", null=True, blank=True, on_delete=models.CASCADE)
neck = models.ForeignKey("Neck", null=True, blank=True, on_delete=models.CASCADE)
fit = models.ForeignKey("Fit", null=True, blank=True, on_delete=models.CASCADE)
pattern_type = models.ForeignKey("Pattern_Type", null=True, blank=True, on_delete=models.CASCADE)
color = models.ForeignKey("Color", null=True, blank=True, on_delete=models.CASCADE)
size = models.ManyToManyField("Size", null=True, blank=True)
sleeve = models.ForeignKey("Sleeve_Length", null=True, blank=True, on_delete=models.CASCADE)
material = models.ForeignKey("Material", null=True, blank=True, on_delete=models.CASCADE)
category = models.ManyToManyField('Category', )
default = models.ForeignKey('Category', related_name='default_category', null=True, blank=True, on_delete=models.CASCADE)
created_on = models.DateTimeField(default=timezone.now)
updated_on = models.DateTimeField(null=True, blank=True)
status = models.BooleanField(default=True)
class Meta:
ordering = ["-id"]
def __str__(self): #def __str__(self):
return self.title
def get_absolute_url(self):
return reverse("product_detail", kwargs={"pk": self.pk})
def get_image_url(self):
img = self.productimage_set.first()
if img:
return img.image.url
return img #None
def pre_save_post_receiver(sender, instance, *args, **kwargs):
if not instance.slug:
instance.slug = unique_slug_generator(instance)
pre_save.connect(pre_save_post_receiver, sender=Product)
def image_upload_to(instance, filename):
title = instance.product.title
slug = slugify(title)
basename, file_extension = filename.split(".")
new_filename = "%s-%s.%s" %(slug, instance.id, file_extension)
return "products/%s/%s" %(slug, new_filename)
class ProductImage(models.Model):
product = models.ForeignKey(Product, on_delete=models.CASCADE)
image = models.ImageField(upload_to=image_upload_to)
created_on = models.DateTimeField(default=timezone.now)
status = models.BooleanField(default=True)
def __unicode__(self):
return self.product.title
views.py
class ProductUpdateDestroyAPIView(generics.RetrieveUpdateDestroyAPIView):
model = Product
queryset = Product.objects.all()
serializer_class = DemoAppProductUpdateDestroySerializer
permission_classes = [IsAdminUser]
authentication_classes = [BasicAuthentication]
serializers.py
class DemoAppProductUpdateDestroySerializer(serializers.ModelSerializer):
image = serializers.SerializerMethodField()
class Meta:
model = Product
fields=[
"id",
"title",
"slug",
"sku",
"price",
"discount_price",
"image",
]
def get_image(self, obj):
return obj.productimage_set.first().image.url