django count code example

Example 1: count gabarit django

#in template you can use the filter length on your model post
{{ posts|length }}

Example 2: count gabarit django

#views.py
#You should instead pass places_count via the context to the template:
def places(request):
    places = Places.objects.order_by('-published_date')[:10]
    places_count = Places.objects.count()
    return render(
        request, 'templates/places.html', {'places':places, 'places_count': places_count}
    )
#in your templatee
<div class="container">
    <h2>Places <span class="badge">{{ places_count }}</span></h2>
</div>

Example 3: django group by

# If you mean to do aggregation you can use the aggregation features of the ORM:
from django.db.models import Count
Members.objects.values('designation').annotate(dcount=Count('designation'))

# This results in a query similar to:
SELECT designation, COUNT(designation) AS dcount
FROM members GROUP BY designation

#and the output would be of the form
[{'designation': 'Salesman', 'dcount': 2}, 
 {'designation': 'Manager', 'dcount': 2}]

Example 4: django filter values with OR operator

Blog.objects.filter(pk__in=[1, 4, 7])

Example 5: django 3.0 queryset examples

>>> Entry.objects.filter(
...     headline__startswith='What'
... ).exclude(
...     pub_date__gte=datetime.date.today()
... ).filter(
...     pub_date__gte=datetime.date(2005, 1, 30)
... )

Example 6: django queryset count

# Returns the total number of entries in the database.
Entry.objects.count()

# Returns the number of entries whose headline contains 'Lennon'
Entry.objects.filter(headline__contains='Lennon').count()