A CRUD application is a website that deals with the CRUD-Create, Retrieve, Update, and Delete<\/strong> operations.\u00a0 A typical example of a CRUD application is a Student data <\/strong>application. In such applications, you can:<\/p>\n\n\n\n We will now learn about each of these operations <\/p>\n\n\n\n Let us now create a simple Student Data<\/strong> CRUD application. <\/p>\n\n\n\n To store the data, we need to create a Django model<\/a>. Hence add the following model into your file.<\/p>\n\n\n Also we will require a Model Form <\/a>to display the model fields to the users. <\/p>\n\n\n In Views.py create the View “CreateView”<\/strong> and add the following code:<\/p>\n\n\n The template “create.html<\/strong>” will look like:<\/p>\n\n\n The URL path for the View will be:<\/p>\n\n\n Now in the retrieve operation, there are two ways possible<\/p>\n\n\n\n Therefore, add both the following Views into your views.py file<\/p>\n\n\n The Corresponding ListView <\/strong>template will be:<\/p>\n\n\n The Corresponding DetailView <\/strong>template will be:<\/p>\n\n\n The URL paths for the Views will be:<\/p>\n\n\n Now add the following Update View into the views.py file<\/p>\n\n\n The corresponding update.html <\/strong>template will look like:<\/p>\n\n\n The URL path for the View will be:<\/p>\n\n\n Now add the Delete View<\/strong> into your views.py file<\/p>\n\n\n The corresponding delete.html <\/strong>will look like:<\/p>\n\n\n The URL path for the View will be:<\/p>\n\n\n That’s it with the coding part !! Now fire up the server and let’s go to “\/data\/create<\/strong>” endpoint <\/p>\n\n\n\n Hit submit and you will reach the “\/data”<\/strong> page where the list of students is displayed.<\/p>\n\n\n\n Now try the “\/data\/1<\/strong>” endpoint<\/p>\n\n\n\n Okay guys !! lets us update the first entry. Go to “\/data\/1\/update<\/strong>“<\/p>\n\n\n\n Make some changes and hit Update, you will be redirected to the Detail View Page of the particular student.<\/p>\n\n\n\n And lastly let’s try to delete the first student. Go to “\/data\/1\/delete<\/strong>“<\/p>\n\n\n\n![\"CRUD\"](\"https:\/\/www.askpython.com\/wp-content\/uploads\/2020\/08\/image-29.png\")
Creating our own CRUD application in Django<\/h2>\n\n\n\n
1. Creating a Model Table<\/h3>\n\n\n\n
\nclass StudentModel(models.Model):\n id = models.IntegerField(primary_key = True)\n student_name = models.CharField(max_length=80)\n rollnumber = models.CharField(max_length=10)\n student_class = models.IntegerField()\n student_age = models.IntegerField()\n\n def __str__(self):\n return f"{self.student_name} : {self.rollnumber}"\n<\/pre><\/div>\n\n\n2. Creating a Model Form<\/h3>\n\n\n\n
\nclass StudentForm(forms.ModelForm):\n class Meta:\n model = StudentModel\n fields = ('id','student_name','rollnumber','student_class','student_age')\n<\/pre><\/div>\n\n\n3. Coding the Create View<\/h3>\n\n\n\n
\nfrom .models import StudentModel\nfrom .forms import StudentForm\nfrom django.shortcuts import render,redirect\n\ndef CreateView(request):\n if request.method == 'POST':\n form = StudentForm(request.POST)\n if form.is_valid():\n form.save()\n return redirect('\/data')\n else:\n form =StudentForm()\n context = {\n 'form':form\n }\n return render(request,'create.html',context)\n<\/pre><\/div>\n\n\n\n<form method = "post">\n {% csrf_token %}\n {{form.as_p}}\n <input type = "submit" value = "submit">\n<\/form>\n<\/pre><\/div>\n\n\n\npath('data\/create', CreateView),\n<\/pre><\/div>\n\n\n4. Coding the Retrieve View<\/h3>\n\n\n\n
\nfrom django.shortcuts import render,redirect\nfrom .models import StudentModel\nfrom .forms import StudentForm\n\ndef Retrieve_ListView(request):\n dataset = StudentModel.objects.all()\n return render(request,'listview.html',{'dataset':dataset})\n\ndef Retrieve_DetailView(request,_id):\n try:\n data =StudentModel.objects.get(id =_id)\n except StudentModel.DoesNotExist:\n raise Http404('Data does not exist')\n\n return render(request,'detailview.html',{'data':data})\n\n<\/pre><\/div>\n\n\n\n{% for data in dataset %}\n{{data}}\n<hr>\n{% endfor %}\n<\/pre><\/div>\n\n\n\n<h3>Name:{{data.student_name}}<\/h3><br>\n<h3>Roll Number:{{data.rollnumber}}<\/h3><br>\n<h3>Class:{{data.student_class}}<\/h3><br>\n<h3>Age:{{data.student_age}}<\/h3><br>\n<hr\/>\n<\/pre><\/div>\n\n\n\n path('data\/', Retrieve_ListView),\n path('data\/<int:_id>',Retrieve_DetailView),\n<\/pre><\/div>\n\n\n5. Coding the Update View<\/h3>\n\n\n\n
\nfrom django.shortcuts import render,redirect,get_object_or_404\nfrom .models import StudentModel\nfrom .forms import StudentForm\n\ndef UpdateView(request,_id):\n try:\n old_data = get_object_or_404(StudentModel,id =_id)\n except Exception:\n raise Http404('Does Not Exist')\n\n if request.method =='POST':\n form =StudentForm(request.POST, instance =old_data)\n\n if form.is_valid():\n form.save()\n return redirect(f'\/data\/{_id}')\n \n else:\n\n form = StudentForm(instance = old_data)\n context ={\n 'form':form\n }\n return render(request,'update.html',context)\n<\/pre><\/div>\n\n\n\n<form method="post">\n {% csrf_token %}\n {{form.as_p}}\n <input type="submit" value = "Update">\n<\/form>\n<\/pre><\/div>\n\n\n\npath('data\/<int:_id>\/update', UpdateView),\n<\/pre><\/div>\n\n\n6. Coding the Delete View<\/h3>\n\n\n\n
\ndef DeleteView(request,_id):\n try:\n data = get_object_or_404(StudentModel,id =_id)\n except Exception:\n raise Http404('Does Not Exist')\n\n if request.method == 'POST':\n data.delete()\n return redirect('\/data')\n else:\n return render(request, 'delete.html')\n<\/pre><\/div>\n\n\n\n<form method="post">\n {% csrf_token %}\n Click YES to confirm\n <input type = "submit" value="YES">\n <a href='\/data'>Cancel<\/a>\n<\/form>\n<\/pre><\/div>\n\n\n\npath('data\/<int:_id>\/delete', DeleteView),\n<\/pre><\/div>\n\n\nImplementing the Student\u2019s App<\/strong><\/h2>\n\n\n\n
![\"Create\"](\"https:\/\/www.askpython.com\/wp-content\/uploads\/2020\/08\/Create.png\")
![\"Retrieve](\"https:\/\/www.askpython.com\/wp-content\/uploads\/2020\/08\/Retrieve-list-view.png\")
![\"Retrieve](\"https:\/\/www.askpython.com\/wp-content\/uploads\/2020\/08\/Retrieve-detail-view.png\")
![\"Update\"](\"https:\/\/www.askpython.com\/wp-content\/uploads\/2020\/08\/Update.png\")
![\"Delete\"](\"https:\/\/www.askpython.com\/wp-content\/uploads\/2020\/08\/Delete.png\")