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Feature #878

Updated by Daniel Curtis about 8 years ago

{{>toc}} 
 This is a condensed version of the Django tutorial found "here":https://docs.djangoproject.com/en/1.10/intro/tutorial01/ 

 h2. Setup The Environment 

 * Setup a python virtual environment to develop in 
 #* For Arch Linux use issue #876 
 #* For FreeBSD use issue #874 

 h2. Install Django 

 * Switch to the pydev user and activate the virtualenv: 
 <pre> 
 su - pydev 
 source ~/venv/new_app/bin/activate 
 </pre> 

 * And install Django: 
 <pre> 
 pip install Django 
 </pre> 

 h2. New Django App 

 * Create a new Django project: project and run the initial database migration: 
 <pre> 
 django-admin startproject www_example_com 
 cd www_example_com 
 ./manage.py migrate 
 </pre> 

 * Edit the project settings.py file: 
 <pre> 
 vi www_example_com/settings.py 
 </pre> 
 #* And add the host IP address of the local development machine: 
 <pre> 
 ALLOWED_HOSTS = ['192.168.1.90'] 
 </pre> 

 * Test the new app by running the development test web server: 
 <pre> 
 ./manage.py runserver 0.0.0.0:8000 
 </pre> 
 *NOTE*: Press @CTRL+C@ to stop the test web server 

 * Now create a new simple poll web application: 
 <pre> 
 ./manage.py startapp polls 
 </pre> 

 h3. Create View 

 * Create the initial view: 
 <pre> 
 vi polls/views.py 
 </pre> 
 #* And add the following: 
 <pre> 
 from django.shortcuts import render 
 from django.http import HttpResponse 

 def index(request): 
     return HttpResponse("Hello, world. You're at the polls index.") 
 </pre> 

 * Now map the view to a URL by creating: 
 <pre> 
 vi polls/urls.py 
 </pre> 
 #* And add the following: 
 <pre> 
 from django.conf.urls import url 

 from . import views 

 urlpatterns = [ 
     url(r'^$', views.index, name='index'), 
 ] 
 </pre> 

 * Next, point the root URLconf at the polls.urls module: 
 <pre> 
 vi www_example_com/urls.py mysite/urls.py 
 </pre> 
 #* And add the URL handler the @polls/@ part of the web application: 
 <pre> 
 from django.conf.urls import include, url 
 from django.contrib import admin 

 urlpatterns = [ 
     url(r'^polls/', include('polls.urls')), 
     url(r'^admin/', admin.site.urls), 
 ] 
 </pre> 

 * Rerun the development test server: 
 <pre> 
 ./manage.py runserver 0.0.0.0:8000 
 </pre> 
 #* And open a web browser and go to http://192.168.1.90/polls 

 h3. Connect to a Database 

 * Begin by initializing the database: 
 <pre> 
 ./manage.py migrate 
 </pre> 

 h3. Create Model 

 * Create the data model file: 
 <pre> 
 vi polls/models.py 
 </pre> 
 #* And add the following to create two data models, *Question* and *Choice*: 
 <pre> 
 from django.db import models 

 class Question(models.Model): 
     question_text = models.CharField(max_length=200) 
     pub_date = models.DateTimeField('date published') 


 class Choice(models.Model): 
     question = models.ForeignKey(Question, on_delete=models.CASCADE) 
     choice_text = models.CharField(max_length=200) 
     votes = models.IntegerField(default=0) 
 </pre> 

 * Edit the @www_example_com/settings.py@ file: 
 <pre> 
 vi www_example_com/settings.py 
 </pre> 
 #* And add the *@polls.apps.PollsConfig@* dotted path to the INSTALLED_APPS setting to include the app in our project: 
 <pre> 
 INSTALLED_APPS = [ 
     'polls.apps.PollsConfig', 
     'django.contrib.admin', 
     'django.contrib.auth', 
     'django.contrib.contenttypes', 
     'django.contrib.sessions', 
     'django.contrib.messages', 
     'django.contrib.staticfiles', 
 ] 
 </pre> 

 * Now create the polls data model migrations to update the database structure: 
 <pre> 
 ./manage.py makemigrations polls 
 </pre> 

 h2. Resources 

 * https://docs.djangoproject.com/en/1.10/intro/tutorial01/

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