MACOSX Python/Django/Postgres Development Setup Procedure

MACOSX Basic Django Setup

[A] VIRTUALENV
    1. Open Terminal
    2. sudo easy_install pip
    3. sudo pip install virtualenv
    4. sudo virtualenv {name of python virtual environment}
    5. cd {virtual environment created}
    6. source bin/activate
[B] DJANGO install & First Project Creation
    1. pip install django
    2. django-admin.py startproject {project name} [django-admin.py command will auto complete with a tab]
    3. cd {project name}
    4. ./manage.py startapp {appname - in django each module is considered an app. An app is plugable.}
    5. pip install psycopg2 [seperate installation in every new virtualenv]
    6. Make the following changes in settings.py
        DATABASES = {
            'default': {
                'ENGINE': 'django.db.backends.postgresql_psycopg2',
                'NAME': 'name of the database',
        	    'USER': 'username',
        	    'PASSWORD': 'password',
        	    'HOST': '127.0.0.1',
        	    'PORT': '5432'
            }
        }
    7. ./manage.py syncdb [Interactive will allow you to create an applicaiton superuser using default auth system of django]
    8. ./manage.py runserver [http://127.0.0.1:8000]

MACOSX Basic PostgreSQL Setup

[A] Install PostgreSQL on MACOSX.
1. Go to --> http://www.enterprisedb.com/products-services-training/pgdownload#osx
2. Unzip the downloaded the file and click on the installer file to start the installation.
3. /Library/PostgreSQL/9.3 as Default Path
4. /Library/PostgreSQL/9.3/data is the default path for data.
5. Set Superuser password.[superuser 'postgres']
6. Check out Applications--> PostgreSQL 9.3(version you have installed)
7. pgAdmin!!! and psql commandline script is available for your comfort.

******************************************************
Django to Connect to PostgreSQL uses psycopg2 package.
******************************************************
--> Refer to MACOSX psycopg2 Driver package/VirtualEnv Settings

MACOSX psycopg2 Driver package-VirtualEnv

[A]psycopg2 connectivity settings.
    1. export PATH=$PATH:/Library/PostgreSQL/9.3/bin/ [installed version with path to bin directory should be added to path]
    2. sudo -E pip install psycopg2
  
If required do upgrade to latest version of python.  

[ERROR] clang error: unknown argument: '-mno-fused-madd'
    1. export CFLAGS=-Qunused-arguments
    2. export CPPFLAGS=-Qunused-arguments
Reference: http://stackoverflow.com/questions/22313407/clang-error-unknown-argument-mno-fused-madd-python-package-installation-fa
    
[ERROR] Reason: No Image found Error:
sudo ln -s /Library/PostgreSQL/9.3/lib/libssl.1.0.0.dylib /usr/lib
sudo ln -s /Library/PostgreSQL/9.3/lib/libcrypto.1.0.0.dylib /usr/lib  
Reference: http://www.goalbrecht.com/2013/12/install-pythonpostgresqlpsycopg2-on-os-x-mavericks-10-9/    

Error loading psycopg2 module: dlopen(/Users/Tush/Documents/dev/grcvirtualenv/lib/python2.7/site-packages/psycopg2/_psycopg.so, 2): Library not loaded: libssl.1.0.0.dylib

libssl library not loaded error cleared after following same symlink steps for no image found error.

sudo ln -s /Library/PostgreSQL/9.3/lib/libssl.1.0.0.dylib /usr/lib
sudo ln -s /Library/PostgreSQL/9.3/lib/libcrypto.1.0.0.dylib /usr/lib