wilamowski-b-m-irwin-j-d-industrial-communication-systems-2011

63-2 Industrial Communication Systems
FIGURE 63.1
Shell interface of Python.
It adheres to the DRY principle, which means “don’t repeat yourself.” Django also provides optional
administrative “create, read, update, and delete” (CRUD) interface templates, which are generated
dynamically through introspection and configured via admin models.
63.2 Software Installation
Both Python and Django are required for setting up the programming environment. Python can be
freely downloaded from http://www.python.org. Versions 2.4 to 2.6 are recommended (Django is
not properly compatible with Python 3.0). The shell interface of Python after installation is shown in
Figure 63.1.
Django can be downloaded from http://www.djangoproject.com/download/ as a packed file, like
“Django-[version number].tar.gz.” After unpacking the file, in command prompt model, the current
directory should be set as where the Django files were released (by cd [directory]). Then the command
setup.py install can be entered for installation. After installation, enter import django
in the shell interface of Python; if there is no error information, it means Django is successfully installed
and bonded with Python (Figure 63.2).
For database development, at least one database server, PostgreSQL, MySQL, or Orade, is required to
be installed in the server. If Django is used on a production site, Apache with mod_wsgi is required for
server configuration [A08].
63.3 Database-Driven Web Site Design
In order to introduce how to use Django for database-driven Web site design, let us have a simple example.
The purpose is to build an online database with basic “CRUD” operations.
63.3.1 Create a Project
The project can be auto-generated by Django, and the important part
is to set a proper instance, including database configuration, Djangospecific
options and application-specific settings [B08].
The whole process is shown in Figure 63.3. First of all, copy the file
django-admin.py to the place where the project will be built, then
locate into the directory by cd in command prompt model. After that,
FIGURE 63.2 Successful instalÂ
lation of Django.
© 2011 by Taylor and Francis Group, LLC