Create a view and Config corresponding urls

• Contents show in the web pages are defined in views.py
• if we want to use the variable in the models we predefined, we should import the models first

from .models import Blog, BlogType

• Generally, each function represents a page

# the page for the list of all blog
def blog_list(request):
    context = {'blogs': Blog.objects.all()}
    return render_to_response('blog/blog_list.html', context)

# the page for showing a exactly blog
def blog_detail(request, blog_pk):
    context = {'blog': get_object_or_404(Blog, pk=blog_pk)}
    return render_to_response('blog/blog_detail.html', context)

• using render_to_response to:

from django.shortcuts import render_to_response

1. return the template
2. sending the parameters to the template

• using get_object_or_404 to get the values from the models

from django.shortcuts import get_object_or_404

def blog_detail(request, blog_pk):
    context = {'blog': get_object_or_404(Blog, pk=blog_pk)}
    return render_to_response('blog/blog_detail.html', context)

• filter the contents in the models

def blog_category(request, blog_type_pk):
    blog_type = get_object_or_404(BlogType, pk=blog_type_pk)
    context = {'blogs': Blog.objects.filter(blog_type=blog_type),
               'blog_type': blog_type,
               }
    return render_to_response('blog/blog_category.html', context)

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Config urls

• we offen config urls in 2 parts:

1.urls.py in project folder
2.urls.py in app folder

in app folder:

• import the views module

from . import views

• define your url for each view in urlpatterns using path() function

urlpatterns = [
    # http://localhost:8000/blog
    path('', views.blog_detail, name='blog_detail'),
    path('type/', views.blog_category, name='blog_category'),
    path('', views.blog_list, name='blog_list'),
]

• the second parameter in path() is the parameter you define in the corresponding function in views.py
• in this module each url will start with '//'

In project folder:

• import views.py(in general, we put the view for home page into the project folder)
• import the include function

from django.urls import path, include

• use include function to include in urls in app folder, .urls

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', views.home, name='home'),
    path('blog/', include('blog.urls')),
]