Backend Assignment

Team/Team/settings.py

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+"""
+Django settings for Team project.
+
+Generated by 'django-admin startproject' using Django 2.2.6.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/2.2/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/2.2/ref/settings/
+"""
+
+import os
+
+# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
+BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/2.2/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = 'nzi^1z_nf@68_8w#a=a%1fnm$$zxlxl&04&%me1f%vvk+3ccna'
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = []
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    'teammembers.apps.TeammembersConfig',
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+]
+
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+]
+
+ROOT_URLCONF = 'Team.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.debug',
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'Team.wsgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/2.2/ref/settings/#databases
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.mysql',
+        'NAME': 'instawork',
+        'HOST': 'localhost',
+        'PORT': '3306',
+        'USER': 'root',
+        'PASSWORD': 'isha1234'
+    }
+}
+
+
+# Password validation
+# https://docs.djangoproject.com/en/2.2/ref/settings/#auth-password-validators
+
+# AUTH_PASSWORD_VALIDATORS = [
+#     {
+#         'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+#     },
+#     {
+#         'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+#     },
+#     {
+#         'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+#     },
+#     {
+#         'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+#     },
+# ]
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/2.2/topics/i18n/
+
+LANGUAGE_CODE = 'en-us'
+
+TIME_ZONE = 'UTC'
+
+USE_I18N = True
+
+USE_L10N = True
+
+USE_TZ = True
+
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/2.2/howto/static-files/
+
+STATIC_URL = '/static/'

Team/Team/urls.py

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+
+from django.contrib import admin
+from django.urls import include, path
+
+urlpatterns = [
+	path('api/', include('teammembers.urls')),
+    path('admin/', admin.site.urls),
+]

Team/Team/wsgi.py

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+"""
+WSGI config for Team project.
+
+It exposes the WSGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/2.2/howto/deployment/wsgi/
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'Team.settings')
+
+application = get_wsgi_application()

Team/manage.py

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+#!/usr/bin/env python
+"""Django's command-line utility for administrative tasks."""
+import os
+import sys
+
+
+def main():
+    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'Team.settings')
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        raise ImportError(
+            "Couldn't import Django. Are you sure it's installed and "
+            "available on your PYTHONPATH environment variable? Did you "
+            "forget to activate a virtual environment?"
+        ) from exc
+    execute_from_command_line(sys.argv)
+
+
+if __name__ == '__main__':
+    main()

Team/teammembers/admin.py

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+from django.contrib import admin
+from .models import TeamMember
+
+admin.site.register(TeamMember)
+
+# Register your models here.

Team/teammembers/apps.py

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+from django.apps import AppConfig
+
+
+class TeammembersConfig(AppConfig):
+    name = 'teammembers'

Team/teammembers/migrations/0001_initial.py

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+# Generated by Django 2.2.6 on 2019-10-14 20:54
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='TeamMember',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('firstName', models.CharField(max_length=200)),
+                ('lastName', models.CharField(max_length=200)),
+                ('email', models.CharField(max_length=200)),
+                ('mobile', models.CharField(max_length=14)),
+                ('role', models.IntegerField(choices=[(1, 'Admin'), (2, 'Regular')])),
+            ],
+        ),
+    ]

Team/teammembers/models.py

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+from django.db import models
+
+class TeamMember(models.Model):
+	firstName = models.CharField(max_length=200, null=False, blank=False)
+	lastName = models.CharField(max_length=200, null=False, blank=False)
+	email = models.CharField(max_length=200, null=False, blank=False)
+	mobile = models.CharField(max_length=14, null=False, blank=False)
+	# Using choices field for standardization. A string other than "Admin" or "Regular" should not be entered
+	ROLE_CHOICES = (
+		(1, ("Admin")),
+		(2, ("Regular")),
+	)
+	role =  models.IntegerField(choices=ROLE_CHOICES, null=False, blank=False)
+
+	def __str__(self):
+		return self.firstName + " " + self.lastName

Team/teammembers/pagination.py

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+from rest_framework_api import LimitOffsetPagination, PageNumberPagination
+
+class Pagination(pagination.PageNumberPagination):
+

Team/teammembers/serializers.py

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+"""
+	Serializers allow querysets and model instances 
+	to be converted to python datatypes
+	that can be rendered into JSON/ XML
+"""
+from rest_framework import serializers
+from .models import TeamMember
+from collections import OrderedDict
+import re
+
+# Stack Overlflow
+class RoleChoicesField(serializers.Field): 
+    def __init__(self, choices, **kwargs):
+        self._choices = OrderedDict(choices)
+        super(RoleChoicesField, self).__init__(**kwargs)
+
+    def to_representation(self, obj):
+        return self._choices[obj]
+
+    def to_internal_value(self, data):
+        for i in self._choices:
+            if self._choices[i] == data:
+                return i
+        raise serializers.ValidationError(
+        	"Acceptable values are {0}.".format(list(self._choices.values())))
+
+class TeamMemberSerializer(serializers.Serializer):
+	# id = serializers.IntegerField(required=False)
+	id = serializers.IntegerField(required=False)
+	firstName = serializers.CharField(max_length=200)
+	lastName = serializers.CharField(max_length=200)
+	email = serializers.CharField(max_length=200)
+	mobile = serializers.CharField(max_length=14)
+	role =  RoleChoicesField(TeamMember.ROLE_CHOICES)
+
+	def validate_data(self, validated_data):
+		mobile = validated_data.get('mobile')
+		email = validated_data.get('email')
+		# 1) Begins with 0 or 91 
+		# 2) Then contains 7 or 8 or 9. 
+		# 3) Then contains 9 digits 
+		pattern = re.compile("(0/91)?[7-9][0-9]{9}")
+		if not pattern.match(mobile):
+			raise serializers.ValidationError('Invalid Phone Number')
+		epattern = re.compile("^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$")
+		if not epattern.match(email):
+			raise serializers.ValidationError('Invalid Email')
+
+	def create(self, validated_data):
+		self.validate_data(validated_data)
+		return TeamMember.objects.create(**validated_data)
+
+	def update(self, instance, validated_data):
+		self.validate_data(validated_data)
+		instance.firstName = validated_data.get('firstName', instance.firstName)
+		instance.lastName = validated_data.get('lastName', instance.lastName)
+		instance.email = validated_data.get('email', instance.email)
+		instance.mobile = validated_data.get('mobile', instance.mobile)
+		instance.role = validated_data.get('role', instance.role)
+		instance.save()
+		return instance

Team/teammembers/urls.py

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+from django.urls import path
+from .views import TeamMemberListView
+
+app_name = "teammembers" # helps do a reverse lookup later
+
+urlpatterns = [
+    path('teammembers/', TeamMemberListView.as_view()),
+    path('teammembers/<int:pk>/', TeamMemberListView.as_view()),
+]

Team/teammembers/views.py

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+from django.http import JsonResponse, HttpResponse
+from rest_framework.views import APIView
+from rest_framework.response import Response
+from .serializers import TeamMemberSerializer
+from django.shortcuts import get_object_or_404
+from rest_framework.settings import api_settings
+
+import json
+
+from .models import TeamMember
+
+
+class TeamMemberListView(APIView):
+	queryset = TeamMember.objects.all()
+	serializer_class = TeamMemberSerializer
+	pagination_class = api_settings.DEFAULT_PAGINATION_CLASS
+
+	def get(self, request):
+		page = self.paginate_queryset(self.queryset)
+	 	if page is not None:
+	        serializer = self.serializer_class(page, many=True)
+	        return self.get_paginated_response(serializer.data)
+
+	def post(self, request):
+		team_member = request.data.get('team_member')
+		serializer = TeamMemberSerializer(data=team_member)
+		if serializer.is_valid(raise_exception=True):
+			team_member_saved = serializer.save()
+		return JsonResponse(TeamMemberSerializer(team_member_saved).data)
+
+	def put(self, request, pk):
+		saved_team_member = get_object_or_404(TeamMember, id=pk)
+		data = request.data.get('team_member')
+		serializer = TeamMemberSerializer(instance=saved_team_member, data=data, partial=True)
+		if serializer.is_valid(raise_exception=True):
+			team_member_saved = serializer.save()
+		return JsonResponse(TeamMemberSerializer(team_member_saved).data)
+
+	def delete(self, request, pk):
+		team_member = get_object_or_404(TeamMember.objects.all(), id=pk)
+		team_member.delete()
+		return JsonResponse({"team_member": []})
+
+	@property
+	def paginator(self):
+	    """
+	    The paginator instance associated with the view, or `None`.
+	    """
+	    if not hasattr(self, '_paginator'):
+	        if self.pagination_class is None:
+	            self._paginator = None
+	        else:
+	            self._paginator = self.pagination_class()
+
+	def paginate_queryset(self, queryset):
+	     """
+	     Return a single page of results, or `None` if pagination is disabled.
+	     """
+	     if self.paginator is None:
+	         return None
+	     return self.paginator.paginate_queryset(queryset, self.request, view=self)
+
+	def get_paginated_response(self, data):
+	     """
+	     Return a paginated style `Response` object for the given output data.
+	     """
+	     assert self.paginator is not None
+	     return self.paginator.get_paginated_response(data)