Getting started with Django 3.0 part 4

#python #django

In this tutorial we will finish our application, at the end of this tutorial you'll have a fully functional Django application.
We will implement :

Forms(Login and registration)
Template
Full CRUD functionalities

Let's write our first form, to do so we need to create a new application and called it accounts

Run

(my-env) $ python manage.py startapp accounts

Inside accounts app create a file and call it forms.py

Now we've this tree of files :

├── accounts # new
│   ├── admin.py
│   ├── apps.py
│   ├── forms.py # new
│   ├── __init__.py
│   ├── migrations
│   │   └── __init__.py
│   ├── models.py
│   ├── tests.py
│   └── views.py
├── contact
│   ├── admin.py
│   ├── apps.py
│   ├── __init__.py
│   ├── migrations
│   │   ├── 0001_initial.py
│   │   └── __init__.py
│   ├── models.py
│   ├── tests.py
│   ├── urls.py
│   └── views.py
├── db.sqlite3
├── manage.py
├── phonebook
│   ├── asgi.py
│   ├── __init__.py
│   ├── settings.py
│   ├── urls.py
│   └── wsgi.py
├── Pipfile
├── Pipfile.lock
└── templates
   ├── base.html
   ├── contact
   │   ├── contact_details.html
   │   ├── contact_list.html

in accounts/forms.py add

from django import forms
from django.contrib.auth.forms import UserCreationForm
from django.contrib.auth.models import User


class LoginForm(forms.Form):
   username = forms.CharField(
       label="Username",
       widget=forms.TextInput(
           attrs={
               "class": "form-control"
           }
       ))
   password = forms.CharField(
       label="password",
       widget=forms.PasswordInput(
           attrs={
               "class": "form-control"
           }
       ))


class SignUpForm(UserCreationForm):
   username = forms.CharField(
       label="Username",
       widget=forms.TextInput(
           attrs={
               "class": "form-control"
           }
       ))
   email = forms.EmailField(
       label="Email ",
       widget=forms.EmailInput(
           attrs={
               "class": "form-control"
           }
       ))
   password1 = forms.CharField(
       label="password",
       widget=forms.PasswordInput(
           attrs={
               "class": "form-control"
           }
       ))
   password2 = forms.CharField(
       label="re-enter your password",
       widget=forms.PasswordInput(
           attrs={
               "class": "form-control"
           }
       ))

   class Meta:
       model = User
       fields = ('username', 'email', 'password1', 'password2')

in accounts/views.py add

from django.shortcuts import render

# Create your views here.
from django.shortcuts import render, redirect
from django.contrib.auth import authenticate, login
from django.contrib.auth.models import User
from .forms import LoginForm, SignUpForm


def login_view(request):
    form = LoginForm(request.POST or None)
    if form.is_valid():
        username = form.cleaned_data.get("username")
        password = form.cleaned_data.get("password")
        user = authenticate(username=username, password=password)
        if user is not None:
            login(request, user)
            return redirect("/contacts/")

    return render(request, "accounts/login.html", {"form": form})


def register_user(request):
    if request.method == "POST":
        form = SignUpForm(request.POST)
        if form.is_valid():
            form.save()
            username = form.cleaned_data.get("username")
            raw_password = form.cleaned_data.get("password1")
            user = authenticate(username=username, password=raw_password)
            return redirect("/login/")
    else:
        form = SignUpForm()
    return render(request, "accounts/register.html", {"form": form})

Create urls.py and add

from django.urls import path
from .views import login_view, register_user
from django.contrib.auth.views import LogoutView

urlpatterns = [
   path('login/', login_view, name="login"),
   path('register/', register_user, name="register"),
   path("logout/", LogoutView.as_view(), name="logout")
]

Don't forget to update your main urls.py

from django.contrib import admin
from django.urls import path, include  # add this

urlpatterns = [
   path('admin/', admin.site.urls),
   path("", include("contact.urls")),  # add this
   path("", include("accounts.urls"))  # add this
]

Now you understand how Django works, here is the full application on Github

Latest comments (5)

CuongDao • Mar 31 '20

Hi Diop,

May I ask about the 'class Meta' in the forms.py file? What its used for?
Thank you.

Ousseynou Diop • Apr 1 '20

Hi dear,
Thank you for reading.

In the Django web framework, a meta class is used to define an extra option for a forms so that other classes withing the web app know the capabilities of the model.

Here is an interesting article about it clouditate.com/what-is-a-meta-clas...