Django 2.0

Feature Overview

Features

• Simplified URL routing syntax
• Window expressions
• Slew of minor features

URL()

PATH()

urlpatterns = [

    url(r'^blog/$', views.blog_list),

    url(r'^blog/(?P<pk>\d+)/$', views.blog_detail)

]

urlpatterns = [

    path('blog/', views.blog_list),

    path('blog/entry/<int:pk>/', views.blog_detail)

]

PATH()

path('blog/', views.blog_list)



# str - matches any string, excluding the backslash '/'
path('blog/entry/<title>/', views.blog_detail)

path('blog/entry/<str:title>/', views.blog_detail)

     


# int - matches any zero or positive integer
path('blog/entry/<int:pk>/', views.blog_detail)

    


# slug - matches any string with hyphens
path('blog/entry/<slug:title>/', views.blog_detail)

    

PATH Convertors

• str, int, slug as already seen before
• uuid - Matches a formatted UUID. To prevent multiple URLs from mapping to the same page, dashes must be included and letters must be lowercase. For example, 075194d3-6885-417e-a8a8-6c931e272f00. Returns a UUID instance.
• path - Matches any non-empty string, including the path separator, '/'. This allows you to match against a complete URL path rather than just a segment of a URL path as with str.

Window Expressions

from django.db import models


class Product(models.Model):

    name = models.CharField(max_length=254)
    category = models.ForeignKey('Category', on_delete=models.PROTECT)
    price = models.PositiveSmallIntegerField(default=0)  # stored in pennies

Window Expressions

from django.db.models import Avg, F, Window


Product.objects.annotate(
    avg_price=Window(
        expression=Avg('price'),
        partition_by=F('category'),
        order_by=F('price').desc(),
    ),
)

Window Expressions

Minor Features

django.contrib.admin

django.contrib.auth

django.contrib.gis

django.contrib.postgres

Management Commands

Full List