Hello i built my first Django app and i tried to make it live using heroku.
My app works fine locally. When i deployed it on heroku i get this error: "Application error
An error occurred in the application and your page could not be served. If you are the application owner, check your logs for details."
I am really new to this. I dont know where to look for logs.
I tried this tutorial to deploy the app.
My code on github.
Any ideas?
# Database
# https://docs.djangoproject.com/en/2.0/ref/settings/#databases
db_from_env = dj_database_url.config(conn_max_age=500)
DATABASES['default'].update(db_from_env)
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
}
}
I had a look at your code on Github. These are the mistakes you have made
You should rename Procfile.txt to Procfile
You also have to change your DATABASES settings in your settings.py. You can have a look at this answer.
Hope that helps!
Related
I just deploy my Django app to Heroku but I cant migrate my migrations to heroku. First I run :
heroku run python manage.py migrate all the migrations list as OK but when I showmigrations, none of them is migrating (all blank [ ]).
Then I try heroku run bash and migrate from there, everything seems ok even showmigrations from bash showing all of the migrations is working. I even manage to create a superuser. But when I open my admin page and log in with superuser it shows 'account.account' table does not exist and when I check showmigrations again all of the migrations are gone. I have been repeating this migration over and over and still can't figure this out.
Does anyone know what I am doing wrong here?
Edit :
I don't know if this is related but when I push my project to Heroku the first time, I'm using Postgre with this setting :
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': DB_NAME,
'USER': DB_USER,
'PASSWORD': DB_PASSWORD,
'HOST': 'localhost',
'PORT': '5432',
}
}
but when I try to run migrations it shows an error something like cant access localhost with 5432 port, it turns out that Heroku trying to access postgre in my localhost instead of using Heroku Postgres. The solution I found is to dump my db and reload it to Heroku. And since I don't know how to set that up. I just comment that postgre setting and replace it with default django setting :
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': BASE_DIR / 'db.sqlite3',
}
}
create my dbsqlite file, running migrations again then once again push it to Heroku, hoping to find an easy way out but instead ended up in this problem
I'd recommend you to push a migrated project to heroku that is
python manage.py migrate
then push that migrated project to heroku
the reason your superuser doesn't get stored while creating superuser from heroku bash is because heroku has an ephemeral drive i.e heroku clears all the modified data from orignal push after equal interval of time.
It turns out that I forgot to install django-heroku. More on this : https://devcenter.heroku.com/articles/django-app-configuration
Well, I had one setting file before and it was working perfectly both in local and AWS of course with both the database configuration in one setting file. When ever I use to push my code on AWS I would comment my local db configuration and then push. So for sure, that's annoying. I can't comment and uncomment constantly both the database configuration in one file.
Therefore, I decided to have 2 setting files. one for the local and the other for AWS.
Once I pulled the code into AWS server and run migrations
python manage.py migrate --settings=settings.staging
It worked and migrated. By the way, this is the setting file which resides my RDS configuration. Now the moment I hit the endpoints via postmant the output is as
OperationalError at /account/v1/login
could not connect to server: Connection refused
Is the server running on host "localhost" (127.0.0.1) and accepting
TCP/IP connections on port 5432?
means it is still reading the default settings file. How come I make the server run this particular staging setting file. Do I have to declare it on nginx, supervisor or gunicorn?
I'm using these 3 services as well.
Below is my settings file for staging.
from .base import *
# --------------- AWS RDS ---------------
DATABASES = {
'default': {
# 'ENGINE': 'django.db.backends.sqlite3',
# 'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': 'db name here',
'HOST': 'RDS host here',
'USER': 'postgres',
'PASSWORD': 'pass here',
'PORT': '5432'
}
}
This is my complete staging.py file. which only have this while the rest of the setting is being imported from base.py which is a default setting file. Also it has the local settings.
Any recommendations?
This is also what I've tried.
import socket
hostname = socket.gethostname()
if hostname == "staging":
from settings.staging import *
Thank you
The way I solved this issue is using hostnames. We have 1 settings file with all the default settings. We then import specific files depending on the hostname. Of course you could also use things like IAM-instance roles or something.
We would have this in the default settings file:
import socket
DATABASE = {'default': {'ENGINE': 'django.db.backends.sqlite3', ...}}
hostname = socket.gethostname()
if hostname == "staging-blabla"
from staging import *
staging.py would contain the following:
DATABASE = {'default': {'ENGINE': 'django.db.backends.postgresql_psycopg2', ...}}
I'm trying to deploy my django app on pythonanywhere by cloning from my github.
When migrating, I'm getting access denied error followed by (using password:YES),here is the a screenshot of that,
Thanks in advance !!
It seems to me like your database settings are wrong. Your database hostname on PythonAnywhere should look something like yourusername.mysql.pythonanywhere-services.com
Check the Database page in your PythonAnywhere dashboard for the correct settings.
Edit: you must use the hostname, username and password from your dashboard in the Django settings file. The adress 10.0.0.4 indicates that your current settings file does not contain the correct settings.
You should configure your DB settings on yourapp/settings.py as mentioned in pythonanywhere guide
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': '<your_username>$<your_database_name>',
'USER': '<your_username>',
'PASSWORD': '<your_mysql_password>',
'HOST': '<your_mysql_hostname>',
}
}
There is also an existing post on SO that might be helpful
I have been struggling for this issue for the whole days while no solutions at all. so I post it here.
I am trying to set up a blog website in Heroku via Django 1.8 which uses Python 3.4.3. I follows the instructions from Heroku website here.
I use "foreman start" to run Django project in my Mac and I already installed all dependence.
Part of my setting.py file involving the database initially looks like:
import dj_database_url
DATABASES = {}
DATABASES['default'] = dj_database_url.config()
Then I got error: ImproperlyConfigured at /settings.DATABASES is improperly configured. Please supply the ENGINE value.
Then I modify the files by adding one line supplying the ENGINE value:
import dj_database_url
DATABASES = {}
DATABASES['default'] = dj_database_url.config()
DATABASES['default']['ENGINE'] = 'django.db.backends.postgresql_psycopg2'
Based on this post answered by Or Arbel, it should work. But I got another error: ImproperlyConfigured at /settings.DATABASES is improperly configured. Please supply the NAME value.
What should I do next? Actually my Django project is very simple and does not involve any database operations(may need in the future). I just want to make it works on Heroku. Thanks!
Do I need to create a database to continue? I just want to make the webpage works.
Thanks for your guys help, specially souldeux.
Update:
I have fixed the issue by using souldeux's method by providing more informations about the database. Here I want to emphasis that it seems the code from the original Heroku tutorial does not work for Django 1.8:
import dj_database_url ####not working for my case
DATABASES = {}
DATABASES['default'] = dj_database_url.config()
Initially I did not create a database because I think it is not necessary for simple projects, based on my understanding obtained from Heroku tutorial. Actually it does need to create a database in Heroku to make it works. The tutorial is here. You need run "heroku config -s | grep HEROKU_POSTGRESQL" to get the database information. The format is like:
scheme://username:password#host:port/database
So you can get 'database', 'username', 'password', etc.
Afterwards, modify the 'settings.py' according to souldeux, then run following codes:
git add .
git commit -m "Ready to go to Heroku"
git push heroku master
heroku run python manage.py syncdb
Now it works. But other issues arise like my webpages do not show images... Anyway it solved. Please confirm my solutions, thanks.
I think you need to add more information to your database definition. For instance, here's what my own database entry looks like in my settings.py:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': 'django',
'USER': 'redacted',
'PASSWORD': 'redacted',
'HOST': '127.0.0.1',
'PORT': '5432',
}
}
If you don't have a database user and password to enter in the fields marked redacted then you need to make sure you have the actual database created and psycopg2 installed.
I put a Django app on Heroku recently. The home page looks fine, but when I try to go to a page that involves making a query (e.g. p = Photo.objects.get(title=title)), I get this error:
could not connect to server: Connection refused
Is the server running on host "localhost" and accepting
TCP/IP connections on port 5432?
In accordance with this answer, I did $ heroku pg:promote HEROKU_POSTGRESQL_GREEN_URL
Then in my settings.py:
DATABASES = {'default': dj_database_url.config(default=os.environ['DATABASE_URL'])}
Still got the same error, so I tried looking at the results of this (as this answer suggests):
$ heroku run python manage.py shell
>>> from django.conf import settings
>>> print settings.DATABASES['default']
{'TIME_ZONE': 'UTC', 'TEST_MIRROR': None, 'NAME': 'snorthway', 'OPTIONS': {},
'HOST': 'localhost', 'TEST_NAME': None, 'PASSWORD': '******', 'ENGINE':
'django.db.backends.postgresql_psycopg2', 'PORT': '', 'USER': 'snorthway',
'TEST_COLLATION': None, 'TEST_CHARSET': None}
At which point I realized I don't know what I should even be looking for in that. I still don't understand what the error means, so I am unsure how to go about debugging it.
You have not configured your django database correctly in settings.py. It thinks your database is on localhost. Sounds like you have a heroku postgres database so your host should be something like:
df3-64-304-50-250.compute-1.amazonaws.com
Heroku exposes a special database URL through an environment variable called:
DATABASE_URL
There is a very cool python package here called dj_database_url: https://github.com/kennethreitz/dj-database-url it converts that environment variable to what django expects.
you can install it with:
$pip install dj-database-url
I use the following in my settings.py
import dj_database_url
DATABASES = {
'default': dj_database_url.config()
}