Python Console(2)Vesion Upgrade and Sample Admin/List/Detail

Python Console(2)Vesion Upgrade and Sample Admin/List/Detail

Creating an admin user
>python manage.py createsuperuser

my default user name is carl, and my usually password.

Make the poll app modifiable in the admin.
modify the polls/admin.py file
# -*- coding: utf-8 -*-from __future__ import unicode_literals

from django.contrib import admin

# Register your models here.from .models import Question Admin
from .models import Choice

admin.site.register(Question)
admin.site.register(Choice)

View Module and Functions
Question ‘index’ Page, Question ‘detail’ page, Question ‘results’ page, Vote action

prepare more views in polls/views.py

def detail(requesst, question_id):
return HttpResponse("You're looking at question %s." % question_id)

def results(request, question_id):
response = "You're looking at the results of question %s." return HttpResponse(response % question_id)

def vote(request, question_id):
return HttpResponse("You're voting on question %s." % question_id)

url mapping in polls/urls.py
urlpatterns = [
# ex: /polls/ url(r'^$', views.index, name='index'),
# ex: /polls/5/ url(r'^(?P<question_id>[0-9]+)/$', views.detail, name='detail'),
# ex: /polls/5/results/ url(r'^(?P<question_id>[0-9]+)/results/$', views.results, name="results"),
# ex: /polls/5/vote/ url(r'^(?P<question_id>[0-9]+)/vote/$', views.vote, name="vote"),
]

Call the DAO API and doing something in the index page
def index(request):
latest_question_list = Question.objects.order_by('-pub_date')[:5]
output = ', '.join([q.question_text for q in latest_question_list])
return HttpResponse(output)

Use Template
django will look for templates directory in default. polls/templates/polls/index.html
{% if latest_question_list %}
<ul>
{% for question in latest_question_list %}
<li>
<a href="/polls/{{question.id}}/">
{{ question.question_text }}
</a>
</li>
{% endfor %}
</ul>
{% else %}
<p>No polls are available.</p>
{% endif%}

The template render and loading
from django.http import HttpResponse
from django.template import loader
from .models import Question


def index(request):
latest_question_list = Question.objects.order_by('-pub_date')[:5]
template = loader.get_template('polls/index.html')
context = {
'latest_question_list':latest_question_list,
}
return HttpResponse(template.render(context,request))

We can use shortcut render instead of template loader
from django.shortcuts import render
from django.http import HttpResponse
from .models import Question


def index(request):
latest_question_list = Question.objects.order_by('-pub_date')[:5]
context = {
'latest_question_list':latest_question_list,
}
return render(request, 'polls/index.html', context)


Raising a 404 if necessary
from django.http import Http404
def detail(request, question_id):
try:
question = Question.objects.get(pk=question_id)
except Question.DoesNotExist:
raise Http404("Question does not exist")
return render(request, 'polls/detail.html', { 'question': question})

A shortcut: get_object_or_404()
from django.shortcuts import get_object_or_404, render
def detail(request, question_id):
question = get_object_or_404(Question, pk=question_id)
return render(request, 'polls/detail.html', { 'question': question})

In side the template we can get the URL from configuration
<li>
<a href="{% url 'detail' question.id %}">
{{ question.question_text }}
</a>
</li>


References:
https://docs.djangoproject.com/en/1.11/intro/tutorial02/
https://docs.djangoproject.com/en/1.11/intro/tutorial03/
https://docs.djangoproject.com/en/1.11/intro/tutorial04/
https://docs.djangoproject.com/en/1.11/intro/tutorial05/
https://docs.djangoproject.com/en/1.11/intro/tutorial06/
https://docs.djangoproject.com/en/1.11/intro/tutorial07/