Add part 1, project and app with minimal models

.gitignore

+*~
+*.bak
+
+*.pyc
+
+venv/
+
+redurl.db

README.md

+A simple web application in Python, using Django
+================================================
+
+Install the virtual environment:
+
+    virtualenv --no-site-packages venv
+    source venv/bin/activate.csh
+    pip install -r requirements.txt
+
+Create the project:
+
+    django-admin startproject redurl
+
+Edit `redurl/settings.py` to define the database.
+Set up things:
+
+    python manage.py migrate
+
+Then start the server:
+
+    python manage.py runserver
+
+Now, create the application:
+
+    python manage.py startapp urlapp
+
+Edit `urlapp/models.py` to define your models.
+
+Add the application in `redurl/settings.py`.
+Then create the database migrations corresponding to your models:
+
+    python manage.py makemigrations urlapp
+
+You can see what really happened with:
+
+    python manage.py sqlmigrate urlapp 0001
+
+Finally, run the migrations:
+
+    python manage.py migrate
+
+Show in the interactive shell:
+
+    python manage.py shell
+    
+    >>> from urlapp.models import User, Url
+    >>> User.objects.all()
+    []
+    >>> u = User(username="nickie", password="sesame")
+    >>> u.save()
+    >>> u.id
+    1
+    >>> u.username
+    'nickie'
+    >>> u.password
+    'sesame'
+    >>> User.objects.all()
+    [<User: nickie>]
+    >>> User.objects.get(id=1)
+    <User: nickie>
+    >>> User.objects.get(pk=1)
+    <User: nickie>
+    >>> u.url_set.all()
+    []
+    >>> u.url_set.create(user=u, target="http://www.softlab.ntua.gr/~nickie/")
+    <Url: http://www.softlab.ntua.gr/~nickie/>
+    >>> u.url_set.all()
+    [<Url: http://www.softlab.ntua.gr/~nickie/>]
+    >>> u.url_set.count()
+    1
+

manage.py

+#!/usr/bin/env python
+import os
+import sys
+
+if __name__ == "__main__":
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "redurl.settings")
+
+    from django.core.management import execute_from_command_line
+
+    execute_from_command_line(sys.argv)

redurl/settings.py

+"""
+Django settings for redurl project.
+
+Generated by 'django-admin startproject' using Django 1.8.2.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/1.8/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/1.8/ref/settings/
+"""
+
+# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
+import os
+
+BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/1.8/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = 'f2$vs)e(0&%y-b3avsa3%j6dr^2s70&4d%sm)6vo%zq!p#9#ka'
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = []
+
+
+# Application definition
+
+INSTALLED_APPS = (
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+    'urlapp',
+)
+
+MIDDLEWARE_CLASSES = (
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+    'django.middleware.security.SecurityMiddleware',
+)
+
+ROOT_URLCONF = 'redurl.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.debug',
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'redurl.wsgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/1.8/ref/settings/#databases
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.sqlite3',
+        'NAME': os.path.join(BASE_DIR, 'redurl.db'),
+    }
+}
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/1.8/topics/i18n/
+
+LANGUAGE_CODE = 'en-us'
+
+TIME_ZONE = 'UTC'
+
+USE_I18N = True
+
+USE_L10N = True
+
+USE_TZ = True
+
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/1.8/howto/static-files/
+
+STATIC_URL = '/static/'

redurl/urls.py

+"""redurl URL Configuration
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/1.8/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
+Including another URLconf
+    1. Add an import:  from blog import urls as blog_urls
+    2. Add a URL to urlpatterns:  url(r'^blog/', include(blog_urls))
+"""
+from django.conf.urls import include, url
+from django.contrib import admin
+
+urlpatterns = [
+    url(r'^admin/', include(admin.site.urls)),
+]

redurl/wsgi.py

+"""
+WSGI config for redurl project.
+
+It exposes the WSGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/1.8/howto/deployment/wsgi/
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "redurl.settings")
+
+application = get_wsgi_application()

requirements.txt

+django==1.8.2

urlapp/admin.py

+from django.contrib import admin
+
+# Register your models here.

urlapp/migrations/0001_initial.py

+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Url',
+            fields=[
+                ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
+                ('target', models.CharField(max_length=256)),
+                ('used', models.IntegerField(default=0)),
+            ],
+        ),
+        migrations.CreateModel(
+            name='User',
+            fields=[
+                ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
+                ('username', models.CharField(max_length=32)),
+                ('password', models.CharField(max_length=128)),
+            ],
+        ),
+        migrations.AddField(
+            model_name='url',
+            name='user',
+            field=models.ForeignKey(to='urlapp.User'),
+        ),
+    ]

urlapp/models.py

+from django.db import models
+
+# Create your models here.
+
+class User(models.Model):
+    username = models.CharField(max_length=32)
+    password = models.CharField(max_length=128)
+
+    def __unicode__(self):
+        return self.username
+
+class Url(models.Model):
+    user = models.ForeignKey(User)
+    target = models.CharField(max_length=256)
+    used = models.IntegerField(default=0)
+
+    def __unicode__(self):
+        return self.target

urlapp/tests.py

+from django.test import TestCase
+
+# Create your tests here.

urlapp/views.py

+from django.shortcuts import render
+
+# Create your views here.