Django CRUD Operation Using Class-Based Views Example

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In this tute, we will discuss django python crud operation using class-based views. let’s discuss about django python crud operation using class-based views app. I’m going to show you about django crud operation using class-based views example. you can see crud operations using class based views in django. You just need to some step to done class based views django python example.

So, class based generic views are advanced set of built-in views which are used for implementation of selective view strategies such as create, retrieve, update, delete.

• CreateView :create or add new entries in a table in the database.
• Retrieve Views :read, retrieve, search, or view existing entries as a list(ListView) or retrieve a particular entry in detail (DetailView)
• UpdateView :update or edit existing entries in a table in the database.
• DeleteView :delete, deactivate, or remove existing entries in a table in the database.
• FormView :render a form to template and handle data entered by user.

Here i will give you simple example of django crud operations crud operation using class-based views, So let's see the below example:

In this second step, we’ll create a new django project using the django-admin. Head back to your command-line interface and run the following command:

django-admin startproject crudexample

python3 manage.py startapp post

Next, you need to add it in the settings.py file as follows:

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'post',
    'crispy_forms',
]

Next step, we will modify the settings.py file and update the database settings to configure the mydb database:

DATABASES = {  
    'default': {  
        'ENGINE': 'django.db.backends.mysql',  
        'NAME': 'example',  
        'USER':'root',  
        'PASSWORD':'root',  
        'HOST':'localhost',  
        'PORT':'3306'  
    }  
}  

In this step. we will require the database model for storing contacts.Open the post/models.py file and add the following code:

from django.db import models

# Create your models here.

class PostModel(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 these model, you need to create migrations using the following command:

python manage.py makemigrations

After successfully run the above command go to the post/migrations/0001_initial.py

# Generated by Django 4.0.5 on 2022-06-25 12:02

from django.db import migrations, models


class Migration(migrations.Migration):

    initial = True

    dependencies = [
    ]

    operations = [
        migrations.CreateModel(
            name='PostModel',
            fields=[
                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('title', models.CharField(max_length=200)),
                ('description', models.TextField()),
            ],
        ),
    ]

Next, you need to migrate your database using the following command:

python manage.py migrate

Now in this step we will create a Django ModelForm for this model. Create form from Models. create a file forms.py:

from django import forms
from .models import PostModel

# creating a django form
class PostForm(forms.ModelForm):

    class Meta:

        model = PostModel

        fields = {
            'title',
            'description'
        }

In this step, we need to create the views for performing the CRUD operations.Open the post/views.py file and add:

from django.shortcuts import render
from django.views import View
from django.http import HttpResponse
from django.views.generic.edit import CreateView, UpdateView, DeleteView
from django.views.generic.list import ListView
from django.views.generic.detail import DetailView
from .models import PostModel
from django import forms
from post.forms import PostForm

# Create your views here.

class PostCreate(CreateView):

    model = PostModel

    fields = [
        'title',
        'description'
    ]

    success_url = '/'

class PostList(ListView):
 
    # specify the model for list view
    model = PostModel

class PostDetails(DetailView):
    # specify the model to use
    model = PostModel

class PostUpdateView(UpdateView):
    # specify the model you want to use
    model = PostModel
 
    # specify the fields
    fields = [
        "title",
        "description"
    ]
 
    # can specify success url
    # url to redirect after successfully
    # updating details
    success_url ="/"

class PostDeleteView(DeleteView):
    # specify the model you want to use
    model = PostModel
     
    # can specify success url
    # url to redirect after successfully
    # deleting object
    success_url ="/"

Next will tell django to look for the templates in the templates folder.Next, inside the post folder create a templates folder:

Next, inside the templates folder, create the following files:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Django CRUD</title>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css">
</head>
<body>
    <div class="container mt-5 pt-5">
        <div class="row d-flex justify-content-center">
            <div class="col-md-12">
                <div class="card">
                    <div class="card-header">
                        <div class="row">
                            <div class="col-md-9">
                                <h3>Django CRUD Operation Using Class-Based Views</h3>
                            </div>
                            <div class="col-md-3 text-right">
                                <a href="{% url 'create' %}" class="btn btn-success btn-sm">Create</a>
                            </div>
                        </div>
                    </div>
                    <div class="card-body">
                        <table class="table table-bordered">
                            <thead>
                                <tr>
                                    <th width="350">Title</th>
                                    <th>Description</th>
                                    <th width="200">Action</th>
                                </tr>
                            </thead>
                            <tbody>
                                {% for object in object_list %}
                                <tr>
                                    <td>{{ object.title }}</td>
                                    <td>{{ object.description }}</td>
                                    <td>
                                        <a href="{{ object.id }}/" class="btn btn-info btn-sm">Show</a>
                                        <a href="{{ object.id }}/update" class="btn btn-primary btn-sm">Edit</a>
                                        <a href="{{ object.id }}/delete" class="btn btn-danger btn-sm">Delete</a>
                                    </td>
                                </tr>
                                {% empty %}
                                <tr>
                                    <td colspan="3">There are no record found.</td>
                                </tr>
                                {% endfor %}
                            </tbody>
                        </table>
                    </div>
                </div>
            </div>
        </div>
    </div>
</body>
</html>

Next, open the /templates/post/postmodel_form.html file and the add:

{% load crispy_forms_tags %}
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Profile Image</title>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css">
</head>
<body>
    <div class="container mt-5">
        <div class="row d-flex justify-content-center">
            <div class="col-md-8">
                <div class="card">
                    <div class="card-header">
                        <h4>Django CRUD Operation Using Class-Based Views</h4>
                    </div>
                    <div class="card-body">
                        <form method = "post" enctype="multipart/form-data">
                            {% csrf_token %}
                            {{ form|crispy }}
                            <button type="submit" class="btn btn-success">Submit</button>
                            <a href="{% url 'home' %}" class="btn btn-secondary">Cancel</a>
                        </form>
                    </div>
                </div>
            </div>
        </div>
    </div>
</body>
</html>

Next, open the /templates/post/postmodel_detail.html file and the add:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Post Details</title>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css">
</head>
<body>
    <div class="container mt-5 pt-5">
        <div class="row d-flex justify-content-center">
            <div class="col-md-12">
                <div class="card">
                    <div class="card-header">
                        <div class="row">
                            <div class="col-md-9">
                                <h3>Post Details</h3>
                            </div>
                            <div class="col-md-3 text-right">
                                <a href="{% url 'home' %}" class="btn btn-success btn-sm">Back</a>
                            </div>
                        </div>
                    </div>
                    <div class="card-body">
                        <table class="table table-bordered">
                            <tbody>
                                <tr>
                                    <th>{{ object.title }}</th>
                                </tr>
                                <tr>
                                    <td>{{ object.description }}</td>
                                </tr>
                            </tbody>
                        </table>
                    </div>
                </div>
            </div>
        </div>
    </div>
</body>
</html>

Next, open the /templates/post/postmodel_detail.html file and the add:

{% load crispy_forms_tags %}
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Delete Record</title>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css">
</head>
<body>
    <div class="container mt-5 pt-5">
        <div class="row d-flex justify-content-center">
            <div class="col-md-12 text-center">
                <form method="post">{% csrf_token %}
                    <p>Are you sure you want to delete "<strong>{{ object }}</strong>"?</p>
                    <button type="submit" class="btn btn-danger">Delete</button>
                </form>
            </div>
        </div>
    </div>
</body>
</html>

In this section, we’ll create the urls to access our CRUD views.Go to the urls.py post/urls.py file and update it as follows:

from django.urls import path
from . import views
from .views import PostCreate, PostList, PostDetails, PostUpdateView, PostDeleteView

urlpatterns = [
    path('create', PostCreate.as_view(), name='create'),
    path('', PostList.as_view(),name='home'),
    path('<pk>/', PostDetails.as_view()),
    path('<pk>/update', PostUpdateView.as_view(),name='update'),
    path('<pk>/delete', PostDeleteView.as_view()),
]

Next, we will require the modify the urls.py your root preoject folder lets update the file.

from django.contrib import admin
from django.urls import path, include

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', include('post.urls')),
]

In this step, we’ll run the local development server for playing with our app without deploying it to the web.

python manage.py runserver

Next, go to the http://localhost:8000/ address with a web browser.

I Hope It will help you....