I am using django-background-tasks to read data from an API into my database. A cronjob is starting python manage.py process_tasks every 15 minutes and works off the jobs in the queue. The task is looking like:
#background(schedule = 900)
def API_2_DB()
....
return None
Now for the first question:
So, how do I reliable create the tasks that will be worked off while the page is "not in use"?
Second question: The database is stockpiling completed tasks - I know I can easily delete them with CompletedTasks.objects.all().delete() somewhere - but is there no built in automatism for this?
As I needed to look around a lot and Stackoverflow being my major source for django related questions, I thought I shared what I learned in case someone comes looking for the same question here:
After a task was created in the task.py inside an app you can regularly call that task while no user is active calling it from the project urls.py:
urls.py:
from django.contrib import admin
from django.urls import path, include
from django.views.generic.base import RedirectView
urlpatterns = [
path('home/', RedirectView.as_view(url='/')),
path('admin/', admin.site.urls),
path('', include('APPName.urls')),
]
from APPName.tasks import API_2_DB
API_2_DB(repeat=100, repeat_until=None)
Related
I was doing tutorial "Writing your first Django app, part 1" and I got stuck in "Write your first view". I have fulfil all instructions regardings files. When I go to http://127.0.0.1:8000/ then I can see "The install worked successfully! Congratulations!" but if I go to http://localhost:8000/polls/ then I see:
Page not found (404)
Request Method: GET
Request URL: http://localhost:8000/polls/
Using the URLconf defined in mysite.urls, Django tried these URL patterns, in this order:
admin/
The current path, polls/, didn’t match any of these.
In this case according instructions I should see "Hello, world. You're at the polls index". I attached 2 files content and 2 interesting screens (why does it emphasize?).
views.py
from django.http import HttpResponse
def index(request):
return HttpResponse("Hello, world. You're at the polls index.")
urls.py
from django.contrib import admin
from django.urls import include, path
urlpatterns = [
path('polls/', include('polls.urls')),
path('admin/', admin.site.urls),
]
I was looking answer in Stack Overflow (also in hints) or YouTube but unfortunately without success. Interesting but in another computer it works, but on my laptop not.
So you are doing the URLS incorrectly, or partially at least.
You need to create another app in django called polls:
python manage.py startapp polls
Then in the polls/urls.py file, include an extension for /polls, that references your view in polls/view.py:
urlpatterns = [
path('/polls', views.<view-name>, name='Polls URL')
]
Then it should work, otherwise you are doing something wrong and need to elaborate on our problem.
Note that Django's DEBUG should be True when developing at all times, so you can see the full error log. DEBUG=FALSE is used if you have a webapp public (aka deployed/in production.
Subject closed. Solution -> Bad configuration urls.py file in mysite and polls. Check content both files in tutorial context.
I’m still learning django and assume this may be easy for some. I’m trying to figure out the best way of simply setting up the API URLs (and so that they all display in the api root and can actually be used in the project - in my case at /api/). I’m using django rest framework, and can’t seem to set up more than one API - it works for just one, but the problem occurs when trying to set up another.
So I have an app called pages and accounts (and core - the default where the main urls.py is). I’ve created another urls.py inside the pages app and another inside the accounts app.
accounts/urls.py:
from . import views
from rest_framework.routers import DefaultRouter
router = DefaultRouter()
router.register(r"accounts", views.AccountsViewSet, basename="accounts")
urlpatterns = router.urls
pages/urls.py:
from . import views
from rest_framework.routers import DefaultRouter
router = DefaultRouter()
router.register(r"pages", views.PagesViewSet, basename="pages")
urlpatterns = router.urls
And the core urls.py:
from django.contrib import admin
from django.urls import path, include
from rest_framework import routers
from rest_framework.routers import DefaultRouter
router = routers.DefaultRouter()
urlpatterns = [
path("admin/", admin.site.urls),
path("api/", include("pages.urls")), # works but root only shows pages API
# path("api/", include("pages.urls", "accounts.urls")), # fails with error: “django.core.exceptions.ImproperlyConfigured: Specifying a namespace in include() without providing an app_name is not supported. Set the app_name attribute in the included module, or pass a 2-tuple containing the list of patterns and app_name instead.”
# path("api/", include(router.urls)), # no error but root api is empty
]
I would assume, possibly incorrectly, that just router.urls should include all the apis when visiting the root. The root apis currently looks like this when using just include("pages.urls”):
{
"pages": "http://localhost:8000/api/pages/"
}
How can I get it to correctly show all apis? The only way I could do it was by putting router.register(r"accounts", views.AccountsViewSet, basename="accounts”) in the pages urls.py, which is very undesirable, especially as the project grows even further.
Thank you
Have you tried to use:
path("api/pages/", include("pages.urls")),
path("api/accounts/", include("accounts.urls")),
In your urls.py?
Possibly that would mean your routes would be:
{
"pages": "http://localhost:8000/api/pages/pages/"
"accounts": "http://localhost:8000/api/accounts/accounts/"
}
In that case you could try to use
router.register("", views.AccountsViewSet, basename="accounts")
in accounts/urls.py.
And similarly,
router.register("", views.AccountsViewSet, basename="pages")
in pages/urls.py.
That way, you might achieve to have routes like:
{
"pages": "http://localhost:8000/api/pages/"
"accounts": "http://localhost:8000/api/accounts/"
}
if that is what you want.
I'm new to Django, have been doing several tutorials to get really comfortable with the structuring, and am now running through the official tutorial.
I've created an polls App, which has a polls/views.py file as follows:
from django.shortcuts import render
from django.http import HttpResponse
# Create your views here.
def index(request):
return HttpResponse("Hello, World. You're at the polls index.")
I've also created an App URLconf file polls/urls.py with the following code:
from django.conf.urls import url
from . import views
url_patterns = [
url(r'^$', views.index, name='index'),
]
This is pretty much exactly as done in the Django tutorial.
My issue is when I'm specifying url routes in the main projectname/url.py file on a project level as such:
from django.conf.urls import include, url
from django.contrib import admin
urlpatterns = [
url(r'^polls/', include('polls.urls')),
url(r'^admin/', admin.site.urls),
]
When doing this, I get the following error:
django.core.exceptions.ImproperlyConfigured: The included URLconf '<module 'polls.urls' from 'ProjectFolder\\polls\\urls.py'>' does not appear to have any patterns in it. If you see valid patterns in the file then the issue is probably caused by a circular import.
This is how the official Django tutorial dictates it to be done. However, if I explicity import the polls/views.py file from the app, I can accomplish the task as follows:
from django.conf.urls import url
from django.contrib import admin
from polls import views
urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^polls/', views.index),
]
My immediate concern is the import of every app/urls file I ever create being necessitated by this approach, as well as the obvious divergence from the official Django instruction.
I hesitated to even ask this question because I feel that such a fundamental issue has bound to have an easy fix. Any help would be greatly appreciated.
To clarify, I can get around the error by explicitly importing the view files from apps. Whenever using the Django documentation-described approach of using the include() function I receive the error. I can appreciate the value of this function, and would like to know why is giving me the error described above.
Just writte urlpatterns = [ .. and not url_patterns in your poll.views.py.
I have a project with two apps with their respective views, but I want to create a views.py in django project directory for some generic pages such as about, login... It is correct to place the views.py and templates in the root project folder for this purpose?
I have been reading about this. The practice more recommended for this is create an app that creates cohesion between other apps, call it web_site or site whatever is better for you.
python manage.py startapp my_site
Everything in this site app will be done the regular way.
In the projects url you will want to import the url in this way so the web pages appear in the / url pattern.
urlpatterns = [
path('admin/', admin.site.urls),
path('', include('my_site.urls'))
]
I do this for project level pages like you describe. These are usually simple pages that tie the project's apps together, and not contain any business logic.
You can do that by making views.py file into the project directory.
from django.contrib import admin
from django.urls import path, include
from attendance import views
urlpatterns = [
path('admin/', admin.site.urls),
path('', include('insert.urls')),
path('login/', views.logins, name='login'),# relevant line
]
And this is the code of login view
from django.shortcuts import render
from django.http import HttpResponse
# Create your views here.
def logins(request):
return HttpResponse("THIS IS LOGIN PAGE !!!")
I am trying to enable the admin for my app. I managed to get the admin running, but I can't seem to make my models appear on the admin page.
I tried following the tutorial (here) which says:
(Quote)
Just one thing to do: We need to tell
the admin that Poll objects have an
admin interface. To do this, create a
file called admin.py in your polls
directory, and edit it to look like
this:
from polls.models import Poll from
django.contrib import admin
admin.site.register(Poll)
(end quote)
I added an admin.py file as instructed, and also added the following lines into urls.py:
from django.contrib import admin
admin.autodiscover()
urlpatterns = patterns('',
...
(r'^admin/', include(admin.site.urls)),
)
but it appears to have no effect. I even added a print 1 at the first line of admin.py and I see that the printout never happens, So I guess django doesn't know about my admin.py. As said, I can enter the admin site, I just don't see anything other than "groups", "users" and "sites".
What step am I missing?
You need to ensure you have app containing Poll listed in INSTALLED_APPS :)
Also: If you're adding the admin.py file with the dev server running, make sure to restart it. This tripped me up for a minute. :)