Detail View – Function based Views Django

Detail View refers to a view (logic) to display a particular instnace of a table from the database with all the necessary details. It is used to display multiple types of data on a single page or view, for example, profile of a user. Django provides extra-ordinary support for Detail Views but let’s check how it is done manually through a function-based view. This article revolves around Detail View which involves concepts such as Django Forms, Django Models.
For Detail View, we need a project with some models and multiple instances which will be displayed.

Django Detail View – Function Based Views

Illustration of How to create and use Detail view using an Example. Consider a project named geeksforgeeks having an app named geeks.

Refer to the following articles to check how to create a project and an app in Django.

After you have a project and an app, let’s create a model of which we will be creating instances through our view. In geeks/models.py,

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# import the standard Django Model
# from built-in library
from django.db import models
   
# declare a new model with a name "GeeksModel"
class GeeksModel(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

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After creating this model, we need to run two commands in order to create Database for the same.



Python manage.py makemigrations
Python manage.py migrate

Now let’s create some instances of this model using shell, run form bash,

Python manage.py shell

Enter following commands

>>> from geeks.models import GeeksModel
>>> GeeksModel.objects.create(
                       title="title1",
                       description="description1").save()
>>> GeeksModel.objects.create(
                       title="title2",
                       description="description2").save()
>>> GeeksModel.objects.create(
                       title="title2",
                       description="description2").save()

Now we have everything ready for back end. Verify that instances have been created from http://localhost:8000/admin/geeks/geeksmodel/

django-Detailview-check-models-instances

For detail_view one would need some identification to get a particular instance of the model. Usually it is unique primary key such as id. To specify this identification we need to define it in urls.py. Go to geeks/urls.py,

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from django.urls import path
  
# importing views from views..py
from .views import detail_view
  
urlpatterns = [
    path('<id>', detail_view ),
]

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Let’s create a view and template for the same. In geeks/views.py,

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from django.shortcuts import render
  
# relative import of forms
from .models import GeeksModel
  
# pass id attribute from urls
def detail_view(request, id):
    # dictionary for initial data with 
    # field names as keys
    context ={}
  
    # add the dictionary during initialization
    context["data"] = GeeksModel.objects.get(id = id)
          
    return render(request, "detail_view.html", context)

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Create a template in templates/Detail_view.html,

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<div class="main">
      
    <!-- Specify fields to be displayed -->
    {{ data.title }}<br/>
    {{ data.description }}<br/>
  
</div>

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Let’s check what is there on http://localhost:8000/1
django-detail-view-demo1
Bingo..!! Detail view is working fine. One can also display selected fields according to type of usage required in multiple forms. Often it is not the id which is used to define the detail view it is the slug. To know more about slug and SlugField visit – Add the slug field inside Django Model




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