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import asyncio
from asgiref.sync import sync_to_async
from django.contrib.auth.models import User
from django.core.cache import cache
from django.http import HttpResponseRedirect, JsonResponse
from django.shortcuts import render
from django.template.response import TemplateResponse
from django.views.decorators.cache import cache_page
def execute_sql(request):
list(User.objects.all())
return render(request, "base.html")
async def async_execute_sql(request):
"""
Some query API can be executed asynchronously but some requires
async version of itself.
https://docs.djangoproject.com/en/5.1/topics/db/queries/#asynchronous-queries
"""
list_store = []
# make async query with filter, which is compatible with async for.
async for user in User.objects.filter(username="test"):
list_store.append(user)
# make async query with afirst
async_fetched_user = await User.objects.filter(username="test").afirst()
list_store.append(async_fetched_user)
return render(request, "base.html")
async def async_execute_sql_concurrently(request):
await asyncio.gather(sync_to_async(list)(User.objects.all()), User.objects.acount())
return render(request, "base.html")
def regular_view(request, title):
return render(request, "basic.html", {"title": title})
def csp_view(request):
"""Use request.csp_nonce to inject it into the headers"""
return render(request, "basic.html", {"title": f"CSP {request.csp_nonce}"})
def template_response_view(request, title):
return TemplateResponse(request, "basic.html", {"title": title})
def new_user(request, username="joe"):
User.objects.create_user(username=username)
return render(request, "basic.html", {"title": "new user"})
def resolving_view(request, arg1, arg2):
# see test_url_resolving in tests.py
return render(request, "base.html")
@cache_page(60)
def cached_view(request):
return render(request, "base.html")
def cached_low_level_view(request):
key = "spam"
value = cache.get(key)
if not value:
value = "eggs"
cache.set(key, value, 60)
return render(request, "base.html")
def json_view(request):
return JsonResponse({"foo": "bar"})
def regular_jinjia_view(request, title):
return render(request, "basic.jinja", {"title": title}, using="jinja2")
def listcomp_view(request):
lst = [i for i in range(50000) if i % 2 == 0]
return render(request, "basic.html", {"title": "List comprehension", "lst": lst})
def redirect_view(request):
return HttpResponseRedirect("/regular/redirect/")
def ajax_view(request):
return render(request, "ajax/ajax.html")
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