Function base views#

আমি মনে করতেছি আপনারা django-rest-framework সম্পর্কে অনেকটা জানেন, আমি just কিছু coding structure দেখাব, যেন প্রয়োজনে code এর structure নিয়ে কাজ করতে সুবিধা হয়।

কয়েকটা step এ Django-Rest-Framework ব্যবহার করে বেশ কিছু project তৈরি করব। একের পর এক function-base views, class-base views, Mixins, Generic Views, ViewSets, Nested Serializers, Pagination, Security, Validation, Token Auth ব্যবহার korbo.

Function base views#

সকল কাজ ২ টি step এ complete হয়ে থাকে ।

  • settings.py + urls.py (in project dir)

  • models.py + serializers.py + views.py + urls.py (in app directory)

এই post এ আমরা just coding demo দেখব। সব code এর পরিবর্তন app dir তে হয়েছে ।


github link


একটি demo DataBase table :

models.py#


from django.db import models

# Create your models here.
class Student(models.Model):
    id = models.IntegerField(primary_key=True)
    name = models.CharField(max_length=200)
    score = models.DecimalField(max_digits=5,decimal_places=2)

    def __str__(self):
        return self.name

then serializer data-base table for querify and work in Views.py as DRF procedure

serializers.py#


from rest_framework import serializers
from .models import Student

class StudentSerializer(serializers.ModelSerializer):
    class Meta:
        model=Student
        fields=['id', 'name','score']

আমরা এই post এ function base view (api_view)decorator নিয়ে কাজ করেছি, যা ২ টা stage এ ঘটেছে।

  • 1.create and view(non-primary key base operations)

  • 2.delete, update and view(primary key base operations).

views.py#


from django.shortcuts import render

from .models import Student
from .serializers import StudentSerializer

from rest_framework.response import Response
from rest_framework import status
from rest_framework.decorators import api_view


# Create your views here.
@api_view(['GET','POST'])
def student_list(request):
    if request.method =='GET':
        students = Student.objects.all()
        serializer=StudentSerializer(students,many=True)
        return Response(serializer.data)

    elif request.method == 'POST':
        serializer = StudentSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data,status=status.HTTP_201_CREATED)
        return Response(serializer.errors,status=status.HTTP_400_BAD_REQUEST)


@api_view(['GET','PUT','DELETE'])
def student_detail(request,pk):
    try:
        student = Student.objects.get(pk=pk)
    except Student.DoesNotExist:
        return Response(status=status.HTTP_404_NOT_FOUND)

    if request.method=='GET':
        serializer = StudentSerializer(student)
        return Response(serializer.data)

    elif request.method == 'PUT':
        serializer = StudentSerializer(student,data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data)
        return Response(serializer.errors,status=status.HTTP_400_BAD_REQUEST)

    elif request.method == 'DELETE':
        student.delete()
        return Response(status=status.HTTP_204_NO_CONTENT)

urls.py#


from django.urls import path
from .import views

urlpatterns = [
    path('s/', views.student_list),
    path('s/<int:pk>', views.student_detail),
]
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