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Tutorial: Create Views and Route your URLs
===========================================
[Demonstration time: 7 mins 00 s (0.817 ~ 82%) | Total time: 8 mins 34 s]
Slide 1 [00:08 | 00:08]
------------
Title Slide
**Creating Views and Resolving URLs**
Slide 2 [00:12 | 00:20]
--------------
**Learning Objectives**
In this tutorial, we will learn to:
- Create a django view
- Create a url routing scheme
Slide 3 [00:11 | 00:31]
---------------
**System Requirements**
- Ubuntu 16.10
- Python 3.5 or higher version
- python3.4-venv
Slide 4 [00:11 | 00:42]
---------------
**Pre-requisites**
In order to follow this tutorial, you need to know:
- how to create models in django
- If not, see the relevant django tutorial on http://spoken-tutorial.org
Slide 5 [00:10 | 00:52]
------------
**What is a View**
- A view is code that accepts a request
- It processes the request and sends back a response
Demonstration [02:00 | 02:52]
-----------
**Creating a View**
Edit the /blog/views.py
from django.http import HttpResponse
def index(request):
return HttpResponse("Hello, world. You are at the blog index")
Demonstration [02:50 | 05:42]
-----------
**Add URL routing to URLConf**
- Create ```urls.py``` in blog app
from django.urls import path
from . import views
app_name = 'blog'
urlpatterns = [
path('', views.index, name='index'),
]
Now change the ```/myproject/urls.py``` so that the project knows which urls file to call
from django.contrib import admin
from django.urls import path, include
urlpatterns = [
path('admin/', admin.site.urls),
path('blogs/', include('blog.urls', namespace='blogs')),
]
- Run the django server using command:
- python manage.py runserver
- **Narrator Note**: Show the web browser to the user
- Go to the url http://localhost:8000/blogs/ and show the output.
- You will see the blog object Query set.
- So we have created a simple client-server model.(At this point we can show
the image, we showed in the previous tutorial.)
- Let us now improve our view.
Demonstration [01:30 | 06:22]
-----------
In the /blog/views.py edit get_blogs function
from .models import Blog
def get_blogs(request):
blogs = Blog.objects.all() # This is called a django query
return HttpResponse(blogs)
- Narrator Notes: Please state that Django queries will be explained later in the series.
- Let us append the url to the urlpatterns in ```blog/urls.py```
urlpatterns = [
.
path('get_blogs/', views.get_blogs, name='get_blogs'),
]
- Go to the url http://localhost:8000/blogs/get_blogs and show the output.
- Show the blog in the output created in previous tutorial
- Improving the output
def get_blogs(request):
blogs = Blog.objects.all() # This is called a query
response = 'Blogs:'
for blog in blogs:
response += '<\ br> {0} '.format(blog)
return HttpResponse(response)
- Narrator Notes: Should explain the above code.
- Save and again show the browser.
- Show the blog in the output created in previous tutorial
Demonstration [01:30 | 07:52]
-----------
Let us further edit the view to display articles related to a blog.
In the /blog/views.py edit get_blogs function
from .models import Blog, Article
def get_blogs(request):
blogs = Blog.objects.all() # This is called a query
response = 'Blogs:'
for blog in blogs:
articles = Article.objects.filter(blog=blog)
response += '<br \> {0} '.format(blog)
response += ', '.join([article.title for article in articles])
return HttpResponse(response)
- Narrator Notes: Should explain the above code.
- Save and again show the browser.
- We now also see the article created in the tutorial 3.
*** With this we come to the end of the tutorial***
----------------------------------------------------
*** Add concluding slides and assignment***[00:42 | 08:34]
-------------------------------------------
Narrator Notes: Can give assignment to create a view ***count_blogs*** for displaying the number of blogs.
|
