Django practical examples

Using the urls.py to display our content in views.py:

urls.py

from django.contrib import admin

from django.urls import path

from myApp import views

urlpatterns = [

    path('admin/', admin.site.urls),

    path ('index/', views.index, name='index')

]

views.py

from django.shortcuts import render

from django.http import HttpResponse

# Create your views here.

def index(request):

    return HttpResponse('<h1>Hello index<h1>')

The above code in the django gives the following result

 

Create Tables using models.py

from django.db import models

# Create your models here.

class sampleTable(models.Model):

    Row1 = models.CharField(max_length = 100)

    Row2 = models.IntegerField()

For creating tables we use make migrations

in cmd type the following commands:

python manage.py makemigrations

python manage.py migrate

After the commands entered, empty sqlite3 file is filled with some table contents which was empty previously

 

opening python shell in cmd

python manage.py shell 

>>> from myApp.models import sampleTable --> Imports the table 

>>> sampleTable.objects.all() --> Displays the table created

Output:

 <QuerySet []>   --> Empty table without data

Adding objects to database

>>> a = sampleTable(row1 ="Raj", row2=25)

Saving the data

>>> a.save()

Output:

>>> from myApp.models import sampleTable

>>> sampleTable.objects.all()

<QuerySet [<sampleTable: Raj>]>     --> Table with data

>>> exit()   

Exited from the shell