[Answer]-Issues with Fetching the data from database

.all() will return a list of objects that represent the rows in your model. .get() only returns one object. Your template is trying to print the result of all() if it was one object.

This is the same as if you had a list and you wanted to loop through it. In your view you would do:

product = Product_attributes.objects.all()
for i in product:
   print i.size
   print i.color

The equvalent for the template is:

<ul>
{% for i in product %}
   <li>{{ i.size }}</li>
   <li>{{ i.color }}</li>
{% endfor %}
</ul>