Djando 2.0.7 image handling problem on production server

[Asif Khan]

I developed application that uses an ImageField in Django==2.0.7 with Pillow 5.2.0 there is no issue on development machine but facing problem on production server giving "Server Error 500" 

Exception Value: No module named 'PIL' which I have not used or called in my code. I new to Python and Django but seems to me is Django or Pillow problem. If I am not wrong.

the following DEBUG=False production detail 

Internal Server Error: /admin/vv/institutes/add/

ModuleNotFoundError at /admin/vv/institutes/add/

No module named 'PIL'

Request Method: POST

Request URL: http://asifkhan69.webfactional.com/admin/vv/institutes/add/

Django Version: 2.0.7

Python Executable: /usr/local/bin/python3

Python Version: 3.6.6

Python Path: ['/home/asifkhan69/webapps/rmsapp', '/home/asifkhan69/webapps/rmsapp/src', '/home/asifkhan69/webapps/rmsapp/lib/python3.6', '/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg', '/home/asifkhan69/webapps/rmsapp/lib/python3.6/pytz-2018.5-py3.6.egg', '/usr/local/lib/python36.zip', '/usr/local/lib/python3.6', '/usr/local/lib/python3.6/lib-dynload', '/usr/local/lib/python3.6/site-packages']

Server time: Sat, 21 Jul 2018 13:16:26 +0000

Installed Applications:

['django.contrib.admin',

'django.contrib.auth',

'django.contrib.contenttypes',

'django.contrib.sessions',

'django.contrib.messages',

'django.contrib.staticfiles',

'accounts',

'vv']

Installed Middleware:

['django.middleware.security.SecurityMiddleware',

'django.contrib.sessions.middleware.SessionMiddleware',

'django.middleware.common.CommonMiddleware',

'django.middleware.csrf.CsrfViewMiddleware',

'django.contrib.auth.middleware.AuthenticationMiddleware',

'django.contrib.messages.middleware.MessageMiddleware',

'django.middleware.clickjacking.XFrameOptionsMiddleware']

Traceback:

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/core/handlers/exception.py" in inner

  35.             response = get_response(request)

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/core/handlers/base.py" in _get_response

  128.                 response = self.process_exception_by_middleware(e, request)

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/core/handlers/base.py" in _get_response

  126.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/contrib/admin/options.py" in wrapper

  575.                 return self.admin_site.admin_view(view)(*args, **kwargs)

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/utils/decorators.py" in _wrapped_view

  142.                     response = view_func(request, *args, **kwargs)

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/views/decorators/cache.py" in _wrapped_view_func

  44.         response = view_func(request, *args, **kwargs)

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/contrib/admin/sites.py" in inner

  223.             return view(request, *args, **kwargs)

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/contrib/admin/options.py" in add_view

  1554.         return self.changeform_view(request, None, form_url, extra_context)

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/utils/decorators.py" in _wrapper

  62.             return bound_func(*args, **kwargs)

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/utils/decorators.py" in _wrapped_view

  142.                     response = view_func(request, *args, **kwargs)

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/utils/decorators.py" in bound_func

  58.                 return func.__get__(self, type(self))(*args2, **kwargs2)

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/contrib/admin/options.py" in changeform_view

  1451.             return self._changeform_view(request, object_id, form_url, extra_context)

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/contrib/admin/options.py" in _changeform_view

  1483.             if form.is_valid():

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/forms/forms.py" in is_valid

  179.         return self.is_bound and not self.errors

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/forms/forms.py" in errors

  174.             self.full_clean()

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/forms/forms.py" in full_clean

  376.         self._clean_fields()

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/forms/forms.py" in _clean_fields

  392.                     value = field.clean(value, initial)

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/forms/fields.py" in clean

  578.         return super().clean(data)

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/forms/fields.py" in clean

  148.         value = self.to_python(value)

File "/home/asifkhan69/webapps/rmsapp/lib/python3.6/Django-2.0.7-py3.6.egg/django/forms/fields.py" in to_python

  611.         from PIL import Image

Exception Type: ModuleNotFoundError at /admin/vv/institutes/add/

Exception Value: No module named 'PIL'

Request information:

USER: asifkhan

[Jason]

sounds like pillow wasn't installed in your prod environment.  how did you set that servcer up?

[Asif Khan]

Pillow is install in my production environment and the same Pillow 5.2.0 on both development and production. 

[Jason]

are you sure?

open up a python shell on the server and do from PIL import image  If it works, then the problem is somewhere else.  If you get an error, its a missing dependency.

[Asif Khan]

Oh dear I checked and found that Pillow was install in Python3.5 where as production setup is for Python3.6 so Pillow was installed by pip3.5 but not with pip3.6 which I have installed now. the problem is resolved. Thanks for make me focus on this.

[Melvyn Sopacua]

On zaterdag 21 juli 2018 19:08:03 CEST Asif Khan wrote:

> Oh dear I checked and found that Pillow was install in Python3.5 where as

> production setup is for Python3.6 so Pillow was installed by pip3.5 but not

> with pip3.6 which I have installed now.

 

Have a look at pyenv. Relying on "versioned commands" goes wrong too often.

 

--

Melvyn Sopacua

[mottaz hejaze]

thats why they invented virtualenv 

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[Gerald Brown]

I use pyvenvwrapper which I find is even better than pyenv.  Once a project is created just enter "workon proj-name" and it will take you to the project directory.  It can be found at: https://github.com/solovyevn/pyvenvwrapper

To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAHV4E-eF%3D3XqH0gf-Y-V7FpsTgc3fN6FzaMkTh26OHuHm6Sy5A%40mail.gmail.com.

[Melvyn Sopacua]

On zondag 22 juli 2018 04:30:09 CEST mottaz hejaze wrote:

> thats why they invented virtualenv

 

Just so you know: pyenv is a wrapper around virtualenv, which can pin a project to a python version and just makes virtual environments easier to work with.

 

There's also virtualenvwrapper for somewhat the same thing, except you have to manually select the virtual environment. The combination of the two is a plugin for pyenv, called pyenvwrapper .

 

A different approach to the same problem is mentioned by Gerald Brown.

 

So there are a lot of options to not work with versioned commands and the point I mentioned pyenv for is that it can read the required version for a given project from a single file in the project directory - something virtualenv cannot do.

 

--

Melvyn Sopacua