Django: How to Convert QuerySet into String

Question

I'm using Python 3 and trying to convert a QuerySet into human-readable text. I have a line like this:

top_post = Post.objects.filter(category='1')[:1]

That prints like this:

<QuerySet [<Post: Test Post 1>]>

What makes me scratch my head is a similar QuerySet successfully converts when displayed via a template:

latest = Post.objects.order_by('-published_date')[:5]

"Latest" uses a for...loop in the template:

{% for latest_posts in latest %}
<h1>{{ latest_posts }}</h1>

While "top_post" displays only a blank:

<h1>{{ top_post }}</h1>

Anyone see what's missing?

Answer 1

{{top_post}} is a query set (slicing a queryset also produces a queryset), so it should display that. When you loop over the queryset, as you do over latest , you display the objects inside.

{{top_post.0}} would give you the object top_post contains.

Alternatively you can use

top_post = Post.objects.filter(category='1').first()

to get the object directly.

Answer 2

You should implement the __str__ method in the Post model where you define what to print. Moreover you should .get instead of .filter if you expect one object to be returned.

Answer 3

Convert it into list

def 
return(Post.objects.filter(category='1').first)

Answer 4

要解决它，您可以使用嵌套循环（其他循环中的循环）

Answer 5

if you are using filter then I am assuming you want more than one value else use get method. You can convert the queryset into list and then play around list.

top_post = list(Post.objects.filter(category='1')[:1])[0]

now top_post will gives the first object in list.