Function Based Views in Django
Function based views are written using a function in python which receives as an argument HttpRequest object and returns an HttpResponse Object. Function based views are generally divided into 4 basic strategies, i.e., CRUD (Create, Retrieve, Update, Delete). CRUD is the base of any framework one is using for development.
How to use Function based view in Django?
Let’s Create a function-based view list view to display instances of a model. Let’s create a model of which we will be creating instances through our view. In geeks/models.py,
# import the standard Django Model
# from built-in library
from django.db import models
# declare a new model with a name "GeeksModel"
class GeeksModel(models.Model):
# fields of the model
title = models.CharField(max_length = 200)
description = models.TextField()
# renames the instances of the model
# with their title name
def __str__(self):
return self.title
After creating this model, we need to run two commands in order to create Database for the same.
Python manage.py makemigrations Python manage.py migrate
Now let’s create some instances of this model using shell, run form bash,
Python manage.py shell
Enter following commands
>>> from geeks.models import GeeksModel
>>> GeeksModel.objects.create(
title="title1",
description="description1").save()
>>> GeeksModel.objects.create(
title="title2",
description="description2").save()
>>> GeeksModel.objects.create(
title="title2",
description="description2").save()
Now if you want to see your model and its data in the admin panel, then you need to register your model.
Let’s register this model. In geeks/admin.py,
from django.contrib import admin
from .models import GeeksModel
# Register your models here.
admin.site.register(GeeksModel)
Now we have everything ready for the back end. Verify that instances have been created from http://localhost:8000/admin/geeks/geeksmodel/
Let’s create a view and template for the same. In geeks/views.py,
from django.shortcuts import render
# relative import of forms
from .models import GeeksModel
def list_view(request):
# dictionary for initial data with
# field names as keys
context ={}
# add the dictionary during initialization
context["dataset"] = GeeksModel.objects.all()
return render(request, "list_view.html", context)
Create a template in templates/list_view.html,
<div class="main">
{% for data in dataset %}.
{{ data.title }}<br/>
{{ data.description }}<br/>
<hr/>
{% endfor %}
</div>
Let’s check what is there on http://localhost:8000/
Similarly, function based views can be implemented with logics for create, update, retrieve and delete views.
Views In Django | Python
Django Views are one of the vital participants of the MVT Structure of Django. As per Django Documentation, A view function is a Python function that takes a Web request and returns a Web response. This response can be the HTML contents of a Web page, a redirect, a 404 error, an XML document, an image, or anything that a web browser can display.
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