Skip to content

Instantly share code, notes, and snippets.

@dmendiza

dmendiza/01_install.sh

Last active March 1, 2021 18:09
Show Gist options
  • Save dmendiza/1b2d3231c9bfe33c0b8a to your computer and use it in GitHub Desktop.
Save dmendiza/1b2d3231c9bfe33c0b8a to your computer and use it in GitHub Desktop.
Download ZIP
Django Unchained - PyTexas 2014
Raw
01_install.sh
# Install Django
pip install django
Raw
02_new_project.sh
# Create a new Project called "bookstore"
django-admin startproject bookstore
cd bookstore/
Raw
03_run_server.sh
# Run the development server
python manage.py runserver
# Django is now serving your project at http://127.0.0.1:8000/
Raw
04_create_app.sh
# Create a new application called "inventory"
python manage.py startapp inventory
Raw
05_add_app_to_settings.py
# Skip this! This is done differently for 2.0
#
# Add the new application to your project
# in bookstore/bookstore/settings.py edit INSTALLED_APPS to include 'inventory'
INSTALLED_APPS = (
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
# Not for 2.0
# 'inventory',
'inventory.apps.InventoryConfig',
)
Raw
06_home_view.py
# In bookstore/inventory/views.py add a new view
# First import Django’s HTTPResponse
from django.http import HttpResponse
# Now add the home view we previously mapped in the URLConf
def home(request):
return HttpResponse(
'<html><body><h1>Django Unchained!</h1></body></html>'
)
# We should now have a new home page that says "Django Unchained!"
Raw
07_map_url.py
# In bookstore/bookstore/urls.py add a new url pattern
# url is obsolete in 2.0
# url(r'^$', 'inventory.views.home'),
# In bookstore/inventory/urls.py
from django.urls import path
from . import views
urlpatterns = [
path('', views.home, name='home'),
]
# Then go to bookstoore/bookstore/urls.py
from django.urls import include, path
urlpatterns = [
path('/', include('inventory.urls')),
path('admin/', admin.site.urls),
]
Raw
08_models.py
# In bookstore/inventory/models.py add the following two models
class Author(models.Model):
first_name = models.CharField(max_length=256)
last_name = models.CharField(max_length=256)
class Book(models.Model):
author = models.ForeignKey(Author)
title = models.CharField(max_length=256)
release_date = models.DateField(null=True)
isbn = models.CharField(max_length=13)
list_price = models.DecimalField(max_digits=8, decimal_places=2)
on_hand = models.IntegerField(default=0)
Raw
09_migration.sh
# Create and apply the first migration
python manage.py makemigraitons
python manage.py migrate
Raw
10_urlconf.py
# Let’s design a view that will give you book details when you navigate to a URL that has the book’s ISBN
# In bookstore/bookstore/urls.py add a new url pattern
# http://localhost:8000/books/ISBN
url(r'^books/(\d+)/$', 'inventory.views.detail'),
Raw
11_detail_view.py
# Adding the detail view
# In bookstore/inventory/views.py let’s add some imports
from django.http import HttpResponse, Http404
from inventory.models import Book
# Now let's add the detail view function
def detail(request, isbn):
matches = Book.objects.filter(isbn__exact=isbn)
if not matches:
raise Http404
else:
book = matches[0]
return render(request, 'detail.html', {'book': book})
Raw
12_base.html
<!-- Create a new directory for templates at bookstore/inventory/templates/ -->
<!-- add a new base.html template in the directory we just created -->
<!DOCTYPE html>
<html>
<head>
<title>{% block title %}{% endblock %}</title>
</head>
<body>
{% block content %}
{% endblock %}
</body>
</html>
Raw
13_detail.html
<!-- add a new detail.html template -->
{% block title %}Django Bookstore{% endblock %}
{% block content %}
<div class="book">
<h1>{{ book.title }}</h1>
<h2>by {{ book.author.first_name }} {{ book.author.last_name }}</h2>
{% if book.release_date %}
<p>Released on {{ book.release_date }}</p>
{% endif %}
</div>
{% endblock %}
Raw
14_order_model.py
# Let’s add a new model to save form data
class Order(models.Model):
first_name = models.CharField(max_length=256)
last_name = models.CharField(max_length=256)
email = models.EmailField()
book = models.ForeignKey(Book)
quantity = models.IntegerField(default=1)
# Don't forget to migrate
# python manage.py makemigrations
# python manage.py migrate
Raw
15_order_form.py
# Now let’s make a Form from the model
# First add a new file bookstore/inventory/forms.py
from django import forms
from inventory import models
class OrderForm(forms.Form):
first_name = forms.CharField(max_length=256)
last_name = forms.CharField(max_length=256)
email = forms.emailField()
book = forms.ModelChoiceField(queryset=models.Book.objects.all())
quantity = forms.IntegerField()
Raw
16_order_urls.py
# Now let’s wire up some new URLs and a couple of views to process form data.
# In bookstore/bookstore/urls.py add
url(r'^books/order/$', 'inventory.views.order'),
url(r'^books/thanks/$', 'inventory.views.thanks'),
Raw
17_order_view.py
# In bookstore/inventory/views.py add
from django.http import HttpResponse, Http404, HttpResponseRedirect
from inventory.forms import OrderForm
from inventory.models import Book, Order
def thanks(request):
return HttpResponse(
'<html><body><h1>Thanks!</h1></body></html'
)
def order(req):
if request.method == 'POST':
form = OrderForm(request.POST)
if form.is_valid():
order = Order()
order.first_name = form.cleaned_data['first_name']
order.last_name = form.cleaned_data['last_name']
order.book = form.cleaned_data['book']
order.quantity = form.cleaned_data['quantity']
order.save()
return HttpResponseRedirect('/books/thanks/')
else:
form = OrderForm()
return render(request, 'order.html', {'form': form})
Raw
18_order.html
<!-- Add a new template in bookstore/inventory/templates/order.html -->
{% block title %}Order a book{% endblock %}
{% block content %}
<form action="/books/order/" method="post">
{% csrf_token %}
{{ form.as_p }}
<input type=submit>
</form>
{% endblock %}
Raw
19_add_user.sh
# First let’s add a new user
python manage.py createsuperuser
# Now let's check out the admin site at http://localhost:8000/admin
Raw
20
# Let's add our models to the Admin site
# In bookstore/inventory/admin.py add
from inventory import models
admin.site.register(models.Book)
admin.site.register(models.Author)
admin.site.register(models.Order)
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment