如何限制每个字段在Django queryset中返回的字段

Question

I have rows of products, that tend to share some information, such as the same images (an image may show multiple products), descriptions, manufacturer, etc.

I would like to choose some fields to only show the information once. I can't use distinct for this (I don't think) as the information is not always identicle, such as with the description, but may be only subtly different enough that I don't want to repeat it.

At the moment, I am using a for loop to display fields from each result, which ends up with something like this:

This is the code I am using in my view:

def collection_detail(request, name=None):
    template = loader.get_template('/webapps/mywebapp/furniture/main_page/templates/main_page/detail.html')
    products = product.objects.filter(id=name)
    cart_product_form = CartAddProductForm()
    context={'products': products,
    'cart_product_form': cart_product_form}
    return HttpResponse(template.render(context))

What would be the appropriate way to do this in a view, ignoring subsequent rows for some fields?

edit: Example queryset results

collection_name|manufacturer|product_type|description|image_url
----------------------------------------------------------------
Testing        |FakeCo      |Bed         |pretty nice|/img/1.jpg
Testing        |FakeCo      |Desk        |pretty bad |/img/2.jpg
Testing        |FakeCo      |Nightstand  |pretty ok  |/img/1.jpg
Testing        |FakeCo      |Draws       |pretty nice|/img/3.jpg

In the example of the above data, I want to show the collection name and manufacturer just once, so the first result would do, each product type, the first description regardless of what it says, and each image that is distinct and not a duplicate.

Answer 1

By this

products = product.objects.filter(id=name)

it will return a queryset, that means it consists of several products information. If you want to get only single objects information change the query like below:

products = product.objects.filter(id=name).first()
or,
products = product.objects.filter(id=name)[:1]

Update If you want to display some fields one value then use this:

{{ value|first }}

Answer 2

products = product.objects.filter(id=name)
collection_name = []
manufacturer = []
product_type = []
description = []
image_url = []
for product in products:
    collection_name.append(product.collection_name)
    manufacturer.append(product.manufacturer)
    product_type.append(product.product_type)
    description.append(product.description)
    image_url.append(product.image_url)
collection_name = set(collection_name)
manufacturer = set(manufacturer)
product_type = set(product_type)
description = set(description)
image_url = set(image_url)

It is little long but it will solve your problem. "set" will make all common names once in the list.