I am trying to deploy a project with digital ocean. I followed the instructions found at https://www.digitalocean.com/community/tutorials/how-to-set-up-django-with-postgres-nginx-and-gunicorn-on-ubuntu-16-04
Some of the important ones:
I ran:
postgres=# CREATE DATABASE jobzumoDB;
CREATE DATABASE
then:
postgres=# CREATE USER admin WITH PASSWORD '123';
CREATE ROLE
postgres=# GRANT ALL PRIVILEGES ON DATABASE jobzumoDB TO admin;
GRANT
set the following in settings.py:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': 'jobzumoDB',
'USER':'admin',
'PASSWORD':'123',
'HOST':'localhost',
'PORT':'',
}
then tried to run:
~/jobzumo/manage.py makemigrations
and got:
File "/home/justin/jobzumo/env/lib/python3.6/site-packages/psycopg2/__init__.py", line 126, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
django.db.utils.OperationalError: FATAL: database "jobzumoDB" does not exist
Two things:
ALLOWED_HOSTS = ['jobzumo.com', '142.93.184.125']
I have not yet connect jobzumo.com to digital ocean, but the IP address was copied from my droplet.
Also, I ran: pip install django gunicorn psycopg2 (from digitial ocean)
but a tutorial on youtube said it was very important to now
install psycopg2-binary instead, however, I did not do this as the video was veering far from digital ocean's tutorial.
Thanks for any help, after starting to understand django I didn't think deploying would be this much of a headscratcher.
Formalizing what we worked out in the comments as an answer, when you give postgres an unquoted string as an identifier, it forces it to lower-case. see this similar answer from pgsql-general mailing list. So the actual name of the database created by the command CREATE DATABASE jobzumoDB; is jobzumodb. to create a database named jobzumoDB it's necessary to use quotes, as in CREATE DATABASE "jobzumoDB";
Use:
NAME': 'jobzumodb',
Instead of:
NAME': 'jobzumoDB',
Related
I'm new to Django and I'm trying to display the result that comes from a Snowflake database. I know that Django has multiple built-in database backend engines like: django.db.backends.postgresql and django.db.backends.mysql among the other few it supports.
Unfortunately, I couldn't find a proper way of configuring a database backend engine in the
settings.py
When I enter sqlalchemy or snowflake-sqlalchemy as the engine, I get this error:
Try using 'django.db.backends.XXX', where XXX is one of:
'mysql', 'oracle', 'postgresql', 'sqlite3'
My guess was to go with sqlalchemy as that's what I usually use to connect to Snowflake outside of Django but for some reason, it's not working properly.
I'd appreciate any guidance on that.
2022 update: There's now a Snowflake backend for Django funded by
Snowflake customers and implemented by Django's Tim Graham:
https://github.com/cedar-team/django-snowflake
From their docs:
Install and usage
Use the version of django-snowflake that corresponds to your version of Django. For example, to get the latest compatible release for Django 3.2.x:
pip install django-snowflake==3.2.*
The minor release number of Django doesn't correspond to the minor release number of django-snowflake. Use the latest minor release of each.
Configure the Django DATABASES setting similar to this:
DATABASES = {
'default': {
'ENGINE': 'django_snowflake',
'NAME': 'MY_DATABASE',
'SCHEMA': 'MY_SCHEME',
'WAREHOUSE': 'MY_WAREHOUSE',
'USER': 'my_user',
'PASSWORD': 'my_password',
'ACCOUNT': 'my_account',
},
}
Some of the discussion while implementing it:
https://groups.google.com/g/django-developers/c/po9dS-2h4lg/m/UeKBoL8dBgAJ?pli=1
You should install a custom Snowflake engine like the following ones. Note that, as of today, those are incomplete. Though, it should not be difficult to implement missing Django features by completing the operations.pyfile.
-> https://github.com/pricemoov/django-snowflake
or
-> https://pypi.org/project/django-snowflake-backend/
please install snowflake-connector-python .E.g. below
pip3 install snowflake-connector-python==1.8.1
Here is the code to connect from SQL Alchemy.
=====================================================================
#!/usr/bin/env python
from snowflake.sqlalchemy import URL
from sqlalchemy import create_engine
engine = create_engine(URL(
account = 'XXXX',
user = 'XXXX',
password = 'XXXXX',
database = 'XXXXXX',
schema = 'XXXXXX',
warehouse = 'XXXXX',
role='XXXXXXXX',
))
try:
connection = engine.connect()
connection.execute(
"CREATE OR REPLACE TABLE test_async(c1 TIMESTAMP_NTZ,c2 VARIANT)",_no_results=True)
finally:
connection.close()
engine.dispose()
=========================================================================
I'm trying to create a geospatial database with geodjango and postgis following the recommendations of the book : Python Geospatial development, 3rd Edition of Erik Westra, in order to do it I'm trying to configure my django database and to connect it to my PostgreSQL db.
After having launched my PostgreSQL database, I've created my django project and django apps. From then I'd like to apply makemigrations command to my shared app with :
python manage.py makemigrations shared
But then I've go the following error :
File "C:\Users\[...]\Anaconda3\lib\site-packages\psycopg2\__init__.py", line 130, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
django.db.utils.OperationalError
I've even tried to check migrations with showmigrations but it makes the same error message so I've absolutely no clue what's going on.
here's my settings.py file:
DATABASES = {
'default': {
'ENGINE': 'django.contrib.gis.db.backends.postgis',
'NAME': 'shapeeditor',
'USER': 'shapeeditor',
'PASSWORD': '(password)',
}
}
I've put (password) to hide the real one but I've checked it's the good one.
The NAME corresponds to the database name with a USER who has the same name
The shared app is written in INSTALLED_APPS so I've checked I didn't forget it.
I've looked at the many posts in StackOverflow about the error I got but it doesn't correspond to what I've facing here
After writing my own question I've found where it bugged...
my USER shapeeditor didn't have the privileges, so it couldn't work, just switched with postgres and I worked, I'll have to change privileges in order to make it work
I am following a tutorial from the book:
Mele, Antonio. Django 2 by Example: Build powerful and reliable Python web applications from scratch (Kindle Locations 1917-1918).
Packt Publishing. Kindle Edition.
I'm at this part:
Adding full-text search to your blog
Installing PostgreSQL
I'm on Windows 10 and I installed Postgres fine. The instructions say to type in the postgres shell:
su postgres
createuser -dP blog
I guess I'm trying to create a user called blog that will have a password and be allowed to create databases?
When I do that I get:
Server [localhost]: su postgres
Database [postgres]: createuser -dP blog
Port [5432]:
Username [postgres]:
psql: warning: extra command-line argument "postgres" ignored
psql: warning: extra command-line argument "-d" ignored
psql: warning: extra command-line argument "createuser" ignored
psql: warning: extra command-line argument "-dP" ignored
psql: warning: extra command-line argument "blog" ignored
psql: warning: extra command-line argument "-p" ignored
psql: warning: extra command-line argument "5432" ignored
psql: could not translate host name "su" to address: Unknown host
Press any key to continue . . .
I'm not sure what to do or what exactly is going on? The instruction is pretty unclear
It looks like you're trying to use commands in psql, su postgres and createuser -dP blog, that are meant for a bash like shell. su postgres says to switch the the postgres OS user, and the createuser command is a shell command to create database users. However, if you are in psql that command isn't accessible.
It also appears that you're typing those commands in when psql is asking for database connection info, so even if you were sending it sql/psql commands it wouldn't work at that point.
Here is the PostgreSQL Documentation on the createuser command. Use this command from the system shell to create database users.
Here is the PostgreSQL Documentation on CREATE ROLE. This is how you create users from within psql.
createuser is a command to be given from the command line. Since you are on Windows that means it is a .exe file probably located in the bin directory of wherever you installed Postgres. At the command prompt or powershell prompt use createuser -dP blog.
Additionally you may have to provide -h localhost -p 5432 -U postgres -W password to createuser.exe to enable it to communicate with the server.
I did as I'd done when I was reading Django for Professionals by William S. Vincent.
Once you clicked on PostgreSQL's install it will ask you for a password. Type: postgres
When it finishes installing the database go to settings.py of your project, comment out the older one:
# DATABASES = {
# 'default': {
# 'ENGINE': 'django.db.backends.sqlite3',
# 'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
# }
# }
and paste the text:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql',
'NAME': 'postgres',
'USER': 'postgres',
'PASSWORD': 'postgres',
'HOST': '127.0.0.1',
'PORT': '5432',
}
}
That's it! I've saved your time! Now you owe me!
I'm trying to add a column to a table via my Django app with South but keep getting the following error upon running the python manage.py migrate <app name> command:
conn = _connect(dsn, connection_factory=connection_factory, async=async)
psycopg2.OperationalError: could not translate host name "ec2-107-21-99-105.comp
ute-1.amazonaws.com" to address: Temporary failure in name resolution
Does anybody have an idea why this is happening? I'm a newbie to both South AND the PostgreSQL database management system (which Heroku uses), so I am more than a bit confused.
Make sure you have defined your default database in settings.py like this:
DATABASES = {
'default': dj_database_url.config(default=os.environ.get('DATABASE_URL'))
}
I have 2 Django projects with following db settings:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': 'db1', # 'db2' for second db
...
}
}
When trying to sync second db with command
python manage.py syncdb --database=db2
I receive error
django.db.utils.ConnectionDoesNotExist: The connection db2 doesn't exist
When I use some other commands, South uses migrations from first project and fills db2 with wrong tables. How to correctly sync/migrate several projects served by single Django + South instance?
The database syncing method does not take the NAME key in the --database option. As specified earlier, default for your db1 only works.
So you need to setup an additional database dictionary for your db2.