Develop Reference

Django Models disappear from app deployed in Heroku

I am building a personal portfolio website with Django which I'm hoping to host on Heroku. I am aware of the platform's ephemeral storage problem so all of the images are served from an s3 bucket. After deploying the app though and running the python manage.py migrate from the dyno and check the postgresql database on the dashboard I can see rows and columns created but they're not populated. Therefore, there are no models stored in this database. I'm not .gitignore-ing the db.sqlite3. I'm also using a virtual environment.
Ih short here's the output of the tree command from the root folder:
├── Procfile
├── db.sqlite3
├── manage.py
├── media
│ └── images
│ ├── angular.png
│ ├── bash.png
│ ├── c.png
│ ├── calibration.png
│ ├── commerce_img.png
│ ├── css3.png
│ ├── django.png
│ ├── git.png
│ ├── html.png
│ ├── image-processing-api.png
│ ├── js-logo.png
│ ├── mail.png
│ ├── my_store.png
│ ├── network.png
│ ├── nodejs.png
│ ├── programmer.svg
│ ├── python.png
│ ├── rest_with_node.png
│ ├── sql.png
│ ├── typescript.png
│ └── wiki_image.png
├── portfolio
│ ├── __init__.py
│ ├── __pycache__
│ │ ├── __init__.cpython-39.pyc
│ │ ├── settings.cpython-39.pyc
│ │ ├── urls.cpython-39.pyc
│ │ └── wsgi.cpython-39.pyc
│ ├── asgi.py
│ ├── settings.py
│ ├── urls.py
│ └── wsgi.py
├── requirements.txt
├── staticfiles
└── webdev_portfolio
├── __init__.py
├── __pycache__
│ ├── __init__.cpython-39.pyc
│ ├── admin.cpython-39.pyc
│ ├── apps.cpython-39.pyc
│ ├── models.cpython-39.pyc
│ ├── tech_stack.cpython-39.pyc
│ ├── urls.cpython-39.pyc
│ └── views.cpython-39.pyc
├── admin.py
├── apps.py
├── models.py
├── static
│ └── webdev_portfolio
│ └── styles.css
├── templates
│ └── webdev_portfolio
│ ├── index.html
│ ├── layout.html
│ ├── project.html
│ └── projects.html
├── tests.py
├── urls.py
└── views.py
Finally here's my settings.py file in case I missed something:
...
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
}
}
import dj_database_url
db_from_env = dj_database_url.config(conn_max_age=600)
DATABASES['default'].update(db_from_env)
Am I missing something?
Thanks.

So you are using psql on Heroku trying to populate it with db.sqlite3 file? If that is your intention that is not going to work. Both databases are different, in fact, to populate a newly created PSQL you would need either a fixture or backup.
Check the Heroku documentation

Cannot import model from .models file to nested app sub_directory

I suspect that I am not understanding something about django. I am trying to test the file scrape.py which calls an api and parses then writes the response to the model CMC in the models.py using sqlalchemy. I am trying to test it to see if the file itself will run but (here's where I think I'm going wrong) I am pressing the play button while having the scrape.py file pulled up in vscode. I suspect there is something here that Django won't allow but am not familiar enough with django to know if that is the case. It is throwing a ModuleNotFound error as described below but I suspect that it's doing that because I am calling it because when I type the dot after apis after import at the top of the file it shows a list of all the drop-down files in my apis app.
Here is my project tree:
(base) justinbenfit#MacBook-Pro-3 cds_website % tree
.
├── api
│ ├── __init__.py
│ ├── __pycache__
│ │ ├── __init__.cpython-38.pyc
│ │ ├── admin.cpython-38.pyc
│ │ ├── apps.cpython-38.pyc
│ │ ├── models.cpython-38.pyc
│ │ ├── serializers.cpython-38.pyc
│ │ ├── urls.cpython-38.pyc
│ │ └── views.cpython-38.pyc
│ ├── admin.py
│ ├── apps.py
│ ├── main.py
│ ├── management
│ │ ├── __init__.py
│ │ ├── commands
│ │ │ ├── __init__.py
│ │ │ ├── __pycache__
│ │ │ │ └── private.cpython-39.pyc
│ │ │ ├── private.py
│ │ │ └── scrape.py
│ │ └── test.py
│ ├── migrations
│ │ ├── 0001_initial.py
│ │ ├── __init__.py
│ │ └── __pycache__
│ │ ├── 0001_initial.cpython-38.pyc
│ │ └── __init__.cpython-38.pyc
│ ├── models.py
│ ├── serializers.py
│ ├── tests.py
│ ├── urls.py
│ └── views.py
├── cds_website
│ ├── __init__.py
│ ├── __pycache__
│ │ ├── __init__.cpython-38.pyc
│ │ ├── settings.cpython-38.pyc
│ │ ├── urls.cpython-38.pyc
│ │ └── wsgi.cpython-38.pyc
│ ├── asgi.py
│ ├── settings.py
│ ├── urls.py
│ └── wsgi.py
├── manage.py
└── requirements.txt
api is an app in a greater project called cds_website. The settings.py file in cds_website project directory contains the following installed apps:
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'api.apps.ApiConfig',
'rest_framework',
'environ'
]
and my apps.py file in the api app contains the following class:
from django.apps import AppConfig
class ApiConfig(AppConfig):
name = 'api'
CMC is a model in my models.py file. I am trying to import it into scrape.py. I have tried:
from ...models import CMC
from api.models import CMC
from ... import CMC
first one throws: ImportError: attempted relative import with no known parent package second one throws: ModuleNotFoundError: No module named 'api' third one throws: ImportError: attempted relative import with no known parent package
Here is a link to the code repo: https://github.com/Justinbenfit23/cds_website
Everything I have read indicates that at least one of these should work. Any direction appreciated!

I'm teste your project with from api.models import CMC and it's worked

The easiest way is to create ecrape_manage.py in cds_website-master
folder, content of ecrape_manage.py:
import os
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "cds_website.settings")
import django
django.setup()
exec(open("api/management/commands/scrape.py").read())
and just run with python ecrape_manage.py

Django can't find my models in Linux but can in Windows

I am somewhat still unfamiliar with Django so please excuse the possible elementary question.
am trying to deploy a Django project, but I am having some problems with it.
The project works exactly as it should on Windows, however I am getting this error on my Ubuntu VPS:
Unhandled exception in thread started by <function wrapper at [...]>
Traceback (most recent call last):
[...]
Stack trace from system/django files
File "/home/django/[Project Name]/apps/sale/admin.py", line 8, in <module>
from .forms import SaleRequestFormAdmin
File "/home/django/[Project Name]/apps/sale/forms.py", line 6, in <module>
from apps.listing.models import Listing
ImportError: No module named listing.models
My structure for the project is like this (with irrelevant components removed or shortened):
.
├── apps
│ ├── [...]
│ ├── listing
│ │ ├── admin.py
│ │ ├── api.py
│ │ ├── apps.py
│ │ ├── forms.py
│ │ ├── __init__.py
│ │ ├── migrations
│ │ │ ├── [...]
│ │ ├── models.py
│ │ ├── tests.py
│ │ └── views.py
│ ├── sale
│ │ ├── admin.py
│ │ ├── api.py
│ │ ├── apps.py
│ │ ├── forms.py
│ │ ├── __init__.py
│ │ ├── migrations
│ │ │ ├── [...]
│ │ ├── models.py
│ │ ├── tests.py
│ │ └── views.py
├── __init__.py
├── [Project Name]
│ ├── __init__.py
│ ├── settings.py
│ ├── urls.py
│ └── wsgi.py
├── manage.py
The apps folder contains all of my Django apps, and is in the same folder as manage.py and my project folder.
You can see that there is a file called models.py in the listing app.
Does anyone have any idea why this does not work on Linux? I couldn't find any relevant information on Google, and I really don't know why it is failing.
Any help would be greatly appreciated.

I think the problem is that apps path is not in your sys path
Try adding the following in your settings.py file:
import os
import sys
PROJECT_ROOT = os.path.dirname(__file__)
sys.path.insert(0, os.path.join(PROJECT_ROOT, 'apps'))
Let know if it helps!

Deploying Project in PythonAnywhere. Settings Module Import Errror

I´m trying to deploy my django 1.6.4 project on pythonAnywhere using python 2.7
I already configured a virtual enviroment and the wsgi file according to the guidelines on the website. But I´m getting a 404 when I check the site. The error lol tells me this:
ImportError: Could not import settings 'tango_with_django_project.settings' (Is it on sys.path? Is there an import error in the settings file?): No module named tango_with_django_project.settings
Here´s my wsgi:
# +++++++++++ DJANGO +++++++++++
# TURN ON THE VIRTUAL ENVIRONMENT FOR YOUR APPLICATION
activate_this = '/home/pjestrada/.virtualenvs/rango/bin/activate_this.py'
execfile(activate_this, dict(__file__=activate_this))
# To use your own django app use code like this:
import os
import sys
#
## assuming your django settings file is at '/home/pjestrada/mysite/settings.py'
path = '/home/pjestrada/rango/tango_with_django_project'
if path not in sys.path:
sys.path.append(path)
os.chdir(path)
os.environ['DJANGO_SETTINGS_MODULE'] = 'tango_with_django_project.settings'
#
import django.core.handlers.wsgi
application = django.core.handlers.wsgi.WSGIHandler()
My tree:
├── Dropbox
│ ├── README.txt
│ └── __init__.py
├── README.txt
└── rango
├── LICENSE
├── README.md
└── tango_with_django_project
├── manage.py
├── media
│ ├── profile_images
│ │ └── 10411981_634016890008979_1609187547738555774_n.jpg
│ └── rango2.jpg
├── populate_rango.py
├── rango
│ ├── __init__.py
│ ├── __init__.pyc
│ ├── admin.py
│ ├── admin.pyc
│ ├── bing_search.py
│ ├── bing_search.pyc
│ ├── forms.py
│ ├── forms.pyc
│ ├── models.py
│ ├── models.pyc
│ ├── tests.py
│ ├── urls.py
│ ├── urls.pyc
│ ├── views.py
│ └── views.pyc
├── static
│ ├── about.jpg
│ ├── css
│ │ ├── bootstrap-fluid-adj.css
│ │ ├── bootstrap-responsive.css
│ │ ├── bootstrap-responsive.min.css
│ │ ├── bootstrap.css
│ │ └── bootstrap.min.css
│ ├── img
│ │ ├── glyphicons-halflings-white.png
│ │ └── glyphicons-halflings.png
│ ├── js
│ │ ├── bootstrap.js
│ │ ├── bootstrap.min.js
│ │ ├── jquery-2.1.1.js
│ │ └── rango-ajax.js
│ └── rango.jpg
├── tango_with_django_project
│ ├── __init__.py
│ ├── __init__.pyc
│ ├── settings.py
│ ├── settings.pyc
│ ├── urls.py
│ ├── urls.pyc
│ └── wsgi.py
└── templates
└── rango
├── about.html
├── add_category.html
├── add_page.html
├── base.html
├── category.html
├── category_list.html
├── index.html
├── login.html
├── page_list.html
├── profile.html
├── register.html
├── restricted.html
└── search.html

Try changing value of path.
path = '/home/pjestrada/rango'
That path is your project directory. It worked for me.

Django ImportError no module named

I've been googling this all day and have not come across a solution, hope you can help:
Using Django 1.6, I made an app called "builds" as part of a project called "computerbuilder".
The site works fine when I use the test server, however I created a file to populate the database with some items, and it's giving me the error when I run python fillDB.py:
Traceback (most recent call last):
File "fillDB.py", line 1, in <module>
from builds.models import BuildsTable
ImportError: No module named builds.models
This is my file fillDB.py:
from builds.models import BuildsTable
moboDB = open("db.txt", "r")
lines = moboDB.read().split('\",')
print lines
def main():
global lines
global BuildsTable
for item in lines:
mobo = BuildsTable.objects.get(moboListing="%s" % item[0])
price_local = BuildsTable.objects.get(moboListing="%s" % item[1])
if(BuildsTable.objects.filter(
moboListing = mobo, price = price_local).exists() == False):
mydb = BuildsTable(moboListing = mobo, price = price_local)
mydb.save()
main()
This is my models.py file from the "builds" app I made:
from django.db import models
# Create your models here.
class BuildsTable(models.Model):
id = models.AutoField(primary_key=True)
moboListing = models.CharField(max_length=200)
price = models.IntegerField()
My directory looks like this:
├── builds
│ ├── admin.py
│ ├── __init__.py
│ ├── models.py
│ ├── tests.py
│ └── views.py
├── computerbuilder
│ ├── dev
│ │ ├── db.txt
│ │ ├── fillDB.py
│ ├── __init__.py
│ ├── settings.py
│ ├── urls.py
│ ├── views.py
│ ├── wsgi.py
├── manage.py
└── requirements.txt
Since I'm using an external file not part of Django, I think that's why its having trouble recognizing it. Also using postgres if that helps.

You need to add the init.py in dev folder. Because it treated as a python package. Next you need to add your django project path in fillDB.py like this,
Root
├──├── builds
│ ├── admin.py
│ ├── __init__.py
│ ├── models.py
│ ├── tests.py
│ └── views.py
├── computerbuilder
│ ├── dev
│ │ ├── db.txt
│ │ ├── fillDB.py
│ ├── __init__.py
│ ├── settings.py
│ ├── urls.py
│ ├── views.py
│ ├── wsgi.py
├── manage.py
└── requirements.txt
Follow the above folder structure,
And also you need to set the django environment variable to this file.
fillDB.py
import sys
import os
if __name__ == "__main__":
sys.path.append('/path/Root')
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "computerbuilder.settings")
from builds.models import BuildsTable
mobo = BuildsTable.objects.all()
print mobo
Hope this help you

Check you sys.path to see whether there have you path or not. Every time you run your python project, python will append you current path to the sys.path. And once you quit the python enviroment, python will remove the path you appended in.
Your problem is you run just run fillDB.py, python just append '../computerbuilder/dev' into sys.path, so python can not find builds module.
The solution is move your fillDB.py file to the same level as builds folder
├── builds
├── fillDB.py
│ ├── admin.py
│ ├── __init__.py
│ ├── models.py
│ ├── tests.py
│ └── views.py
├── computerbuilder
│ ├── dev
│ │ ├── db.txt
│ ├── __init__.py
│ ├── settings.py
│ ├── urls.py
│ ├── views.py
│ ├── wsgi.py
├── manage.py
└── requirements.txt
Hope it can help you :D