[PYTHON] Django class-based view

Introduction

Here, we'll explain the basics of django's class-based views (general-purpose views). Write in views.py under the application directory. Suppose you want to use SampleModel from models.py as a model and SampleForm from forms.py as a form.

TemplateView

This is the simplest form of class view. It can be used to create various pages.

views.py

from django.views import generic


class SampleTemplate(generic.TemplateView):
    template_name = 'app/app_template.html'

In addition, template_name that specifies the HTML file to be a template will be used by default even if it is not specified at the time of class definition if it is app name / app name_view name.html. The same is true for the other views described below.

ListView

It can be used for pages that list multiple records, such as the article list page of a blog.

views.py

from django.views import generic

from .model import SampleModel


class SampleList(generic.ListView):
    model = SampleModel
    template_name = 'app/app_list.html'
    paginate_by = 10 #When adding pagination

model specifies the model that contains the records to display on the page.

CreateView

It can be used for pages that create new records, such as creating new articles for blogs.

views.py

from django.urls import reverse_lazy
from django.views import generic

from .model import SampleModel
from .forms import SampleForm


class SampleCreate(generic.CreateView):
    model = SampleModel
    form_class = SampleForm
    template_name = 'app/app_create.html'
    success_url = reverse_lazy('app:app_list')

A form screen is created based on the form specified by form_class. Also, success_url specifies the page to transition to after successful article creation. Details will be explained in the article ʻurls.py`.

DetailView

It can be used for pages that display record details, such as individual pages of blog posts.

views.py

from django.views import generic

from .model import SampleModel
from .forms import SampleForm


class SampleDetail(generic.Detail):
    model = SampleModel
    template_name = 'app/app_detail.html'

UpdateView

It can be used for pages that update the record contents once created, such as the edit screen of blog articles.

views.py

from django.urls import reverse_lazy
from django.views import generic

from .model import SampleModel
from .forms import SampleForm


class SampleUpdate(generic.UpdateView):
    model = SampleModel
    form_class = SampleForm
    template_name = 'app/app_update.html'
    success_url = reverse_lazy('app:app_list')

DeleteView

It can be used for pages that delete created records, such as the delete screen for blog articles.

views.py

from django.urls import reverse_lazy
from django.views import generic

from .model import SampleModel
from .forms import SampleForm


class SampleDelete(generic.DeleteView):
    model = SampleModel
    template_name = 'app/app_delete.html'
    success_url = reverse_lazy('app:app_list')

Summary

Here's the basics of django's class-based views. Next time, I'll talk about function-based views.