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>>>> Django <<<<<<
--------------------------------------------------------------------------
--------------------------------------------------------------------------
//Django CRUD
https://studygyaan.com/django/django-crud-create-retrieve-update-delete-function-based-views
--------------------------------------------------------------------------
--------------------------------------------------------------------------
--------------------------------------------------------------------------
--------------------------------------------------------------------------
--------------------------------------------------------------------------
//Django CRUD (Create, Retrieve, Update, Delete) Function Based Views
CRUD:
Create :- create new entries in your database
Retrieve :- retrieve or fetch all or some data from your database
Update :- update or edit data in your database.
Delete :- delete data from database.
-----------------------------------------------------------------
//1. Create a Django project.
django-admin startproject blog16
//2. Create an app in that django-project
python manage.py startapp CRUD
//3. Add your app name in installed apps.
Settings.py
INSTALLED_APPS = [
'blog16',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
]
//Step 2. Add files and Folder to the Django Project
Settings.py
import os
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [os.path.join(BASE_DIR,'templates')],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]
//Urls.py
from django.contrib import admin
from django.urls import path,include
urlpatterns = [
path('admin/', admin.site.urls),
path('',include('CRUD.urls'))
]
Settings.py
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql',
'NAME': 'blog16',
'USER': 'postgres',
'PASSWORD': '2320',
'HOST': 'localhost'
}
}
Index.html
<html>
<head>
<title>C.R.U.D</title>
<style>
.container {
margin-left: 550px;
margin-top: 150px;
width: 300px;
height: 100px;
padding: 15px;
background-color: aquamarine;
}
</style>
</head>
<body>
<p style="margin-left:550px;"><a href="retrieve">Check data</a></p>
<div class="container">
<table>
<tbody>
<form action="create" method="POST">
{% csrf_token %}
<tr>
<td> Name</td>
<td><input type="text" name="name" required></td>
</tr>
<tr>
<td> Age</td>
<td><input type="text" name="age" required></td>
</tr>
<tr>
<td> Address</td>
<td><textarea name='address' required></textarea></td>
</tr>
<tr>
<td><button>Submit</button></td>
</tr>
</form>
</tbody>
</table>
</div>
</body>
</html>
--------------------------------------------------------------
Create a table in models.py
Models.py
from django.db import models
# Create your models here.
class Details(models.Model):
name=models.CharField(max_length=100)
age=models.IntegerField()
address=models.TextField(max_length=255)
Run migrations
python manage.py makemigrations
python manage.py migrate
Now, provide the path for the index page in urls.py of (here, CRUD) app.
Urls.py
from django.urls import path
from . import views
from django.conf.urls import url
urlpatterns = [
path('',views.index,name='index'),
path('create',views.create,name="create"),
]
At last add the function for creating new entries in views.py.
Views.py
from django.shortcuts import render,redirect
from .models import Details
# Create your views here.
def index(request):
return render(request,'index.html')
def create(request):
if request.method=="POST":
name=request.POST['name']
age=request.POST['age']
address=request.POST['address']
obj=Details.objects.create(name=name,age=age,address=address)
obj.save()
return redirect('/')
-----------------------------------------------------------------------------
3.2 Retrieve operation
Retrieve.html
<html>
<head>
<title>C.R.U.D</title>
<style>
table {
margin-left: 550px;
margin-top: 150px;
column-width: 20px;
font-size: 20px;
border: 5px solid black;
padding: 5px;
}
thead {
padding: 10px;
}
tbody {
padding: 10px;
}
</style>
</head>
<body>
<p style="margin-left:550px;"><a href="/">Home</a></p>
<div class="container">
<table border="5px solid #000;">
<tbody>
<thead>
<tr>
<th>Name</th>
<th>Age</th>
<th>City</th>
<th>Edit</th>
<th>Delete</th>
</tr>
</thead>
<tbody>
{% for i in details %}
<tr>
<td style="padding:10px;">{{i.name}}</td>
<td style="padding:10px;">{{i.age}}</td>
<td style="padding:10px;">{{i.address}}</td>
<td style="padding:10px;"><a href="#">Edit</a></td>
<td style="padding:10px;"><a href="#">Delete</a></td>
</tr>
{% endfor %}
</tbody>
</tbody>
</table>
</div>
</body>
</html>
----------------------------------------------------------------------
Urls.py
from django.urls import path
from . import views
from django.conf.urls import url
urlpatterns = [
path('',views.index,name='index'),
path('create',views.create,name="create"),
path('retrieve',views.retrieve,name="retrieve"),
]
Views.py
from django.shortcuts import render,redirect
from .models import Details
def retrieve(request):
details=Details.objects.all()
return render(request,'retrieve.html',{'details':details})
//3.3 Update operation
Retrieve.html
<td style="padding:10px;"><a href="{% url 'edit' i.pk %}">Edit</a></td>
-----------------------------------------------------------------------------
Edit.html
<html>
<head>
<title>C.R.U.D</title>
<style>
.container {
margin-left: 550px;
margin-top: 150px;
width: 300px;
height: 100px;
padding: 15px;
background-color: aquamarine;
}
</style>
</head>
<body>
<h1>Edit</h1>
<p style="margin-left:550px;"><a href="retrieve">Check data</a></p>
<div class="container">
<table>
<tbody>
<form action="/update/{{object.id}}" method="POST">
{% csrf_token %}
<tr>
<td> Name</td>
<td><input type="text" name="name" value={{object.name}}></td>
</tr>
<tr>
<td> Age</td>
<td><input type="text" name="age" value={{object.age}}></td>
</tr>
<tr>
<td> Address</td>
<td><textarea name='address'>{{object.address}}</textarea></td>
</tr>
<tr>
<td><button>Submit</button></td>
</tr>
</form>
</tbody>
</table>
</div>
</body>
</html>
----------------------------------------------------------------------------
Forms.py
from django import forms
from .models import Details
class detailsform(forms.ModelForm):
class Meta:
model=Details
fields="__all__"
---------------------------------------------------------
Urls.py
from django.urls import path
from . import views
from django.conf.urls import url
urlpatterns = [
path('',views.index,name='index'),
path('create',views.create,name="create"),
path('retrieve',views.retrieve,name="retrieve"),
path('edit/<int:id>',views.edit,name="edit"),
path('update/<int:id>',views.update,name="update"),
]
------------------------------------------------------------
Views.py
from .forms import detailsform
def edit(request,id):
object=Details.objects.get(id=id)
return render(request,'edit.html',{'object':object})
def update(request,id):
object=Details.objects.get(id=id)
form=detailsform(request.POST,instance=object)
if form.is_valid:
form.save()
object=Details.objects.all()
return redirect('retrieve')
//3.4 Delete operation
Retrieve.html
<td style="padding:10px;"><a href="{% url 'delete' i.pk %}">Delete</a></td>
Urls.py
from django.urls import path
from . import views
from django.conf.urls import url
urlpatterns = [
path('',views.index,name='index'),
path('create',views.create,name="create"),
path('retrieve',views.retrieve,name="retrieve"),
path('edit/<int:id>',views.edit,name="edit"),
path('update/<int:id>',views.update,name="update"),
url(r'^delete_product/(?P<pk>[0-9]+)/$', views.delete,name="delete"),
]
Views.py
def delete(request,pk):
Details.objects.filter(id=pk).delete()
return redirect('retrieve')
---------------------------------------------------------------------------------------
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