# Class Based View

> [Docs](https://docs.djangoproject.com/en/3.0/topics/class-based-views/)

<br>

## Class Based View

* Class that creates View functions
* There are differences & advantages compared to `function-based-view`!
  * HTTP methods like **GET**, **POST** requests can be expressed as individual methods rather than conditional branching

    HTTP methods have 1:1 correspondence with class methods, so readability is good
* Excellent extensibility
  * Can maximize extensibility by utilizing `Mixin` modules
    * **Mixin**: Module for adding additional functionality or information to classes
* Can maintain code intuitiveness even with complex logic

\ <br>

### `Function generic view` vs `class based generic view`

<br>

#### Function generic view

ex)

```python
def index(request):
    articles = Article.objects.all()
    return render(request, 'articles/index.html', {'articles': articles})
```

<br>

#### class based generic view

ex)

> views.py

```python
from django.views.generic import ListView, DetailView

class ArticleListView(ListView):
    model = Article
    # template_name = 'articles/model_name_list.html' -> Automatically finds this way
    # context_object_name = 'object_list'

class ArticleDetailView(DetailView):
    model = Article
```

<br>

> urls.py

```python
from django.contrib import admin
from django.urls import path
from articles import views

urlpatterns = [
    path('admin/', admin.site.urls),
    path('articles/', views.ArticleListView.as_view()),
    path('articles/<int:pk>',views.ArticleDetailView.as_view()),
]
```

\ <br>

`+`

### Django REST API Auth

<https://django-rest-auth.readthedocs.io/en/latest/installation.html>

<br>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://chloe-codes1.gitbook.io/til/django/django-101/12_class_based_view.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.