Problem trying to use postgresql and psycopg2 in a django project

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tramites xpress drive

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Nov 20, 2019, 6:50:01 AM11/20/19
to Django users

Hi, I Have been trying to setup my django 2 developement environment and to connect it to postgresql but whern I change the parameters in settings.py on the sections of DATABASES to use POSTGRES and Psycopg2  I Receive the following error



eztve) Indiras-MBP-16a3:ezt Sindira$ python manage.py runserver


Watching for file changes with StatReloader

Exception in thread django-main-thread:

Traceback (most recent call last):

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/db/backends/postgresql/base.py", line 20, in <module>

    import psycopg2 as Database

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/psycopg2/__init__.py", line 50, in <module>

    from psycopg2._psycopg import (                     # noqa

ImportError: dlopen(/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/psycopg2/_psycopg.cpython-37m-darwin.so, 2): Library not loaded: libssl.1.1.dylib

  Referenced from: /Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/psycopg2/_psycopg.cpython-37m-darwin.so

  Reason: image not found


During handling of the above exception, another exception occurred:


Traceback (most recent call last):

  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/threading.py", line 926, in _bootstrap_inner

    self.run()

  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/threading.py", line 870, in run

    self._target(*self._args, **self._kwargs)

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/utils/autoreload.py", line 54, in wrapper

    fn(*args, **kwargs)

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 109, in inner_run

    autoreload.raise_last_exception()

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/utils/autoreload.py", line 77, in raise_last_exception

    raise _exception[1]

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/core/management/__init__.py", line 337, in execute

    autoreload.check_errors(django.setup)()

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/utils/autoreload.py", line 54, in wrapper

    fn(*args, **kwargs)

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/__init__.py", line 24, in setup

    apps.populate(settings.INSTALLED_APPS)

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/apps/registry.py", line 114, in populate

    app_config.import_models()

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/apps/config.py", line 211, in import_models

    self.models_module = import_module(models_module_name)

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/importlib/__init__.py", line 127, in import_module

    return _bootstrap._gcd_import(name[level:], package, level)

  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import

  File "<frozen importlib._bootstrap>", line 983, in _find_and_load

  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked

  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked

  File "<frozen importlib._bootstrap_external>", line 728, in exec_module

  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/contrib/auth/models.py", line 2, in <module>

    from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/contrib/auth/base_user.py", line 47, in <module>

    class AbstractBaseUser(models.Model):

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/db/models/base.py", line 117, in __new__

    new_class.add_to_class('_meta', Options(meta, app_label))

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/db/models/base.py", line 321, in add_to_class

    value.contribute_to_class(cls, name)

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/db/models/options.py", line 204, in contribute_to_class

    self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/db/__init__.py", line 28, in __getattr__

    return getattr(connections[DEFAULT_DB_ALIAS], item)

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/db/utils.py", line 201, in __getitem__

    backend = load_backend(db['ENGINE'])

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/db/utils.py", line 110, in load_backend

    return import_module('%s.base' % backend_name)

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/importlib/__init__.py", line 127, in import_module

    return _bootstrap._gcd_import(name[level:], package, level)

  File "/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/django/db/backends/postgresql/base.py", line 24, in <module>

    raise ImproperlyConfigured("Error loading psycopg2 module: %s" % e)

django.core.exceptions.ImproperlyConfigured: Error loading psycopg2 module: dlopen(/Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/psycopg2/_psycopg.cpython-37m-darwin.so, 2): Library not loaded: libssl.1.1.dylib

  Referenced from: /Users/Sindira/Documents/ezt/eztve/lib/python3.7/site-packages/psycopg2/_psycopg.cpython-37m-darwin.so

  Reason: image not found



My virtual Envirnonment have the following packages installed




Django==2.2.5

psycopg2==2.8.3

pytz==2019.2

sqlparse==0.3.0


Yoo

unread,
Nov 21, 2019, 12:58:54 AM11/21/19
to Django users
Hey, I think for OSX (Mac) or anything using the Darwin OS (basically apple) has to use psycopg2’s binary. Just install psycopg2-binary and it should work.
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