Django is giving me a 404 error - django

I installed Django, and it works. I set it up so it uses my mysql database, and I started a project. So far so good.
I followed the tutorial on setting up your first Django app over at
https://docs.djangoproject.com/en/dev/intro/tutorial01/
It is a tutorial over setting up a pre-existing poll app where everything has practically been built for you. The database structure has even been handled.
I ran:
python manage.py startapp polls
python manage.py sql polls
python manage.py syncdb
I didn't receive any kind of success message so I went into my phpmyadmin, and hooray! There are new tables and rows in my database.
Their tutorial then told me to run:
python manage.py shell
and that I'd see some database stuff, but I didn't. Why could this be? I ignored it and went on to step two. I still hadn't set DEBUG in my settings.py to False so I did. Only to get a 500 error.
After some digging I read I needed to add:
ALLOWED_HOSTS = ['my ip address'];
I did this and now after running:
python manage.py runserver myip:8000
When I try to access Django in my browser I get a
Not Found
The requested URL / was not found on this server.
Obviously / changes to a different location when navigating to those places as well, but the point is I get a 404 no matter what.
So I look at my terminal and I have a yellow message in my terminal that says.
"GET / HTTP/1.1" 404 74
and there is 1 message like this for each place I tried to access.
I'm thinking there is a Python package that I don't have installed on my server?
I do not want to use ALLOWED_HOSTS ['*'] I read that this is bad practice. I did try it and it produces the same results as using my ip address in place of the * (I just wanted to add that extra piece of info in case it helps)

If you want to use the database shell, you should run the dbshell command instead of shell as in your post, like this:
python manage.py dbshell
If you run shell, you get a Python shell, where you can easily import and inspect the Python objects of your project.
On your local PC, it's better to have DEBUG = True in your settings.py. That way you don't need to bother about ALLOWED_HOSTS, because in debug mode all hosts are allowed. Secondly, when you get a 404 error in debug mode, the page will show you the valid URLs that you can try.
The Django tutorial certainly works. The only way it won't work for you is if you missed a step or mistyped something somewhere. If you start over and pay extra attention, I think it will work.

Related

Internal server error running Django on Heroku accessing from browser

I think this is a simple fix, but I've deployed quite a few Django apps to Heroku and I still can't figure out what's going on.
Accessing https://dundjeon-finder.herokuapp.com/ gives me a 500 error when using the browser/curl, but if I shell into the app using heroku run ./manage.py shell I can render the views no problem. My logs aren't telling me anything (just that the response is 500) despite DEBUG being set to True, and Sentry isn't receiving an error (it has previously when the database env variable was set badly), so I'm assuming it's something to do with the way the request works.
The repo is public, any help would be much appreciated! The settings file is here.
Well it was because of using asgi instead of wsgi. I'm not sure why that caused the errors, but will do some more searching.

Google Chrome does not show the back end error

I want chrome to show the error by detail but it doesn't!
the way I see
I want something like this.
the way I want to see
Seems like you don't have the server running.
Try opening your terminal on the folder you have installed Django.
Then run:
python manage.py runserver
And see if you can access it.
Additionally, make sure you have set up DEBUG = True in your settings.py file.

Heroku Server 500 error on particular page

Just deployed a Django app on Heroku. Everything works except for one page of my site which creates a Server 500 error (even though it works fine on my local development server).
The page raising the error doesn't do anything unusual. It makes some database calls, renders some forms, implements JQuery, etc. Any clue what this could be or how I can debug it?
Also, I thought this might be a data issue since my data in Dev doesn't match my data in production, but I checked and this doesn't seem to be the cause.
enable DEBUG=TRUE in your django settings.py file or type in console heroku logs --app your_app to get heroku server logs.
This was because I didn't include a runtime.txt telling Heroku to use Python 3 instead of 2 which subsequently raised an error in one of my views where I called super() with no args.

Django manage.py runserver never finishes "validating models"

I am trying to follow the django tutorial. I am running on windows+eclipse.
When I run python manage.py runserver I get the message Validating models... and afterwards see no progress...
Am I doing something wrong?
I've got my answer in another question: can't get django to work in eclipse + windows
When I ran the server with the --noreload option, I saw that there's an exception thrown. After I fixed that, the output does complete, and says:
Validating models...
0 errors found
Django version 1.2.1, using settings 'XXX'
Development server is running at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.
The shell is running the runserver process, and it won't go back to a command prompt until the server process ends. So, this sounds normal.
Is the server functioning?
You could possibly be importing something in your models.py file that is failing in another file. I had an import in a try/catch clause that caused this behavior. Installing the missing dependency fixed the problem.
This is what you're supposed to see. If you make a request to your test site (via your browser), you will see the log of the request. If you don't see that, then something else is wrong.

Django: Why can't I get my development server to work?

I'm on Windows XP with the latest install of Python 2.6 (and the development server has been working up until last night). I have the path and Python path stuff all set up, and my dev server has worked forever. I recently replaced my django-trunk with a new pull from the Django trunk. I thought maybe there was an import error or something that Django wouldn't catch in one of my app's models.py so I started a new project (empty but just for testing) and it still didn't work. I restarted my computer and tried the new empty app again python manage.py runserver 8080 and went to http://127.0.0.1:8080/ and it worked ("Congrats. Django is insta..."). So I CD over to my real project and tried again and it didn't work. I'm not getting a stack trace or anything like that. I either get [17/Ja/2010 16:30:51] "GET / HTTP/1.1" 301 0 as output when I visit http://127.0.0.1:8080/ in my CMD prompt or I get nothing (even if I hard refresh, etc). What could this be?
Update (Important):
Firefox tells me Firefox can't find the server at www.127.0.0.1. even though I'm at http://127.0.0.1:8080/. Does this mean that Django is really sending a 301 to www.127.0.0.1 for some other reason?
I removed PREPEND_WWW from settings.py, and even removed all the apps (except for the django admin and preset ones) that were installed in settings.py.
Update 2: It works in Safari! How can this be? It's like Firefox is getting some sort of 301 but Safari works just fine.
yep, 301 permanent redirect is remembered by firefox, i've been stuck once on that one, restarting or cleaning history/cache didn't help, so i just ran it on another port.
edit after commenting:
assuming you use some localhost_settings.py to setup your project locally and still want to www_redirect on the production website:
try:
from localhost_settings import *
PREPEND_WWW = False
except ImportError:
PREPEND_WWW = True
i do it this way