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Introduction
In Django, creating forms is very similar to creating a model. All of the work done by Django forms can be done with advanced HTML, but Django makes it easier and more efficient. Rendering HTML forms in Django is one of the important parts of Django forms.
In this article, we will learn about rendering HTML form in Django in detail. So, without any further ado, let's get started!
GET and POST in Django
Django supports all types of HTML forms and renders data from them to a view for further processing using logical operations. We should be familiar with GET and POST requests to get started with forms.
GET: GET combines the data submitted into a string and creates a URL. The URL includes the data keys and values and the address to which the data must be sent. If we do a search in the Django documentation, we'll get a URL of the form as:
POST: Any request that can potentially change the state of the system, such as one that modifies the database, should use POST. When combined with other security features such as Django's CSRF protection, POST gives us more control over access.
Render HTML Forms in Django
Let us understand how we can render HTML Django form using an example. Let’s consider a project called codingninjas, which has a ninja app.
Let's make a simple HTML form to demonstrate how we can take user data and use it in our view. In ninjas > templates > home.html, paste the following code.
Now we need to change urls.py for the ninjas app to render it in our view.
In codingninjas> urls.py, type the following code.
from django.urls import path # importing views from views..py from .views import ninjas_view urlpatterns = [ path('', home_view ), ]
Now let's go back to our home view and see how we're going to get the data. In Django, the entire data from an HTML form is transferred as a JSON object known as a request. Let's start by creating a view:
from django.shortcuts import render # Create views here. defhome_view(request): # logic of view is implemented. return render(request, "home.html")
By default, every HTML form sends a GET request to the application's back end; GET requests typically work with queries in the URL.
The name attribute of the input tag and the name entered in the form are appended to the URL. This is how the GET request works, regardless of how many inputs are added to the URL to send the data to the application's back end. Let's look at how we can finally get this data into our view by applying logic based on the data.
Django requires that we add percent csrf token percent in a form whenever we create a form request for security reasons.
Now, in views.py, let’s check what request.POST has got.
from django.shortcuts import render # Create your views here. defhome_view(request): print(request.POST) return render(request, "home.html")
This way, the data can be queried into the database or processed using a logical operation before being passed to the template via the context dictionary.
Rendering Fields Manually
We don't have to let Django unpack the fields of the form, we can do it ourselves if we prefer. Each field is available as a form attribute using form.name of the field and will be rendered appropriately in a Django template.
What do you mean by Django? Django is a Python-based web application framework that is free and open source. A web framework is a collection of components that make it easier and faster to create websites.
What do you mean by Django form? Form is a Django class used to create HTML forms. It describes a form's functionality and appearance. Each field of the form class corresponds to the HTML form <input> element and is a class in and of itself, managing form data and performing validation while the form is being submitted.
What are the different types of Django forms? The HTML markup and server-side validation facilities of Django form fields define two types of functionality.
What is render's purpose in Django? The purpose of render() is to return a HttpResponse with the content of calling render_to_string() with the passed arguments.
Key Takeaways
In this article, we've learned about how to render HTML forms in Django in detail. If you want to learn the Django form, you can find it here. You can also check our blog on Django Models.
If you are curious to learn advanced front-end web development, Coding Ninjas has one of the best courses available, which you can find here.
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