all the ham

companies_api/admin.py

@@ -0,0 +1,6 @@
+from django.contrib import admin
+
+# Register your models here.
+from .models import Company
+admin.site.register(Company)
+

companies_api/apps.py

@@ -0,0 +1,5 @@
+from django.apps import AppConfig
+
+
+class CompaniesApiConfig(AppConfig):
+    name = 'companies_api'

companies_api/migrations/0001_initial.py

@@ -0,0 +1,22 @@
+# Generated by Django 3.1.7 on 2021-03-10 00:34
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Company',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=32)),
+                ('industry', models.CharField(max_length=32)),
+            ],
+        ),
+    ]

companies_api/migrations/0002_company_home.py

@@ -0,0 +1,20 @@
+# Generated by Django 3.1.7 on 2021-03-10 21:39
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('locations_api', '0001_initial'),
+        ('companies_api', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='company',
+            name='home',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='companies', to='locations_api.location'),
+        ),
+    ]

companies_api/migrations/0003_auto_20210310_2142.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.1.7 on 2021-03-10 21:42
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('companies_api', '0002_company_home'),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name='company',
+            old_name='home',
+            new_name='headquarters',
+        ),
+    ]

companies_api/migrations/0004_company_employees.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.1.7 on 2021-03-11 21:02
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('contacts_api', '0002_contact_home'),
+        ('companies_api', '0003_auto_20210310_2142'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='company',
+            name='employees',
+            field=models.ManyToManyField(to='contacts_api.Contact'),
+        ),
+    ]

companies_api/models.py

@@ -0,0 +1,10 @@
+from django.db import models
+from locations_api.models import Location
+from contacts_api.models import Contact
+
+# Create your models here.
+class Company(models.Model):
+    name = models.CharField(max_length=32)
+    industry = models.CharField(max_length=32)
+    headquarters = models.ForeignKey(Location, related_name='companies', null=True, on_delete=models.SET_NULL)
+    employees = models.ManyToManyField(Contact)

companies_api/serializers.py

@@ -0,0 +1,10 @@
+from .serializers_base import CompanySerializerBase
+from locations_api.serializers_base import LocationSerializerBase
+from contacts_api.serializers import ContactSerializer
+
+class CompanySerializer(CompanySerializerBase): # serializers.ModelSerializer just tells django to convert sql to JSON
+    headquarters = LocationSerializerBase()
+    employees = ContactSerializer(many=True)
+
+    class Meta(CompanySerializerBase.Meta):
+        fields = CompanySerializerBase.Meta.fields + ('headquarters', 'employees')

companies_api/serializers_base.py

@@ -0,0 +1,15 @@
+from rest_framework import serializers 
+from locations_api.serializers_base import LocationSerializerBase
+from .models import Company
+
+class CompanySerializerBase(serializers.ModelSerializer):
+    class Meta:
+        model = Company# tell django which model to use
+        fields = ('id', 'name', 'industry',) # tell django which fields to include
+
+class CompanySerializerWithHeadquarters(CompanySerializerBase):
+    headquarters = LocationSerializerBase()
+
+    class Meta(CompanySerializerBase.Meta):
+        fields = CompanySerializerBase.Meta.fields + ('headquarters',)
+

companies_api/tests.py

@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.

companies_api/urls.py

@@ -0,0 +1,8 @@
+from django.urls import path
+from . import views
+
+urlpatterns = [
+    path('api/companies', views.CompanyList.as_view(), name='company_list'), # api/contacts will be routed to the ContactList view for handling
+    path('api/companies/<int:pk>', views.CompanyDetail.as_view(), name='company_detail'), # api/contacts will be routed to the ContactDetail view for handling
+]
+

companies_api/views.py

@@ -0,0 +1,12 @@
+from rest_framework import generics
+from .serializers import CompanySerializer
+from .models import Company 
+
+class CompanyList(generics.ListCreateAPIView):
+    queryset = Company.objects.all() # tell django how to retrieve all objects from the DB
+    serializer_class = CompanySerializer # tell django what serializer to use
+
+class CompanyDetail(generics.RetrieveUpdateDestroyAPIView):
+    queryset = Company.objects.all()
+    serializer_class = CompanySerializer
+

contacts_api/admin.py

@@ -0,0 +1,6 @@
+from django.contrib import admin
+
+# Register your models here.
+from .models import Contact
+admin.site.register(Contact)
+

contacts_api/apps.py

@@ -0,0 +1,5 @@
+from django.apps import AppConfig
+
+
+class ContactsApiConfig(AppConfig):
+    name = 'contacts_api'

contacts_api/migrations/0001_initial.py

@@ -0,0 +1,22 @@
+# Generated by Django 3.1.7 on 2021-03-09 21:57
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Contact',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=32)),
+                ('age', models.IntegerField()),
+            ],
+        ),
+    ]

contacts_api/migrations/0002_contact_home.py

@@ -0,0 +1,20 @@
+# Generated by Django 3.1.7 on 2021-03-10 21:55
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('locations_api', '0001_initial'),
+        ('contacts_api', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='contact',
+            name='home',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='homes', to='locations_api.location'),
+        ),
+    ]

contacts_api/migrations/0003_auto_20210311_2102.py

@@ -0,0 +1,20 @@
+# Generated by Django 3.1.7 on 2021-03-11 21:02
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('locations_api', '0001_initial'),
+        ('contacts_api', '0002_contact_home'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='contact',
+            name='home',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='inhabitants', to='locations_api.location'),
+        ),
+    ]

contacts_api/models.py

@@ -0,0 +1,9 @@
+from django.db import models
+from locations_api.models import Location
+
+# Create your models here.
+class Contact(models.Model):
+    name = models.CharField(max_length=32)
+    age = models.IntegerField()
+    home = models.ForeignKey(Location, related_name='inhabitants', null=True, on_delete=models.SET_NULL)
+

contacts_api/serializers.py

@@ -0,0 +1,10 @@
+from .serializers_base import ContactSerializerBase
+from locations_api.serializers_base import LocationSerializerBase
+from companies_api.serializers_base import CompanySerializerWithHeadquarters
+
+class ContactSerializer(ContactSerializerBase): # serializers.ModelSerializer just tells django to convert sql to JSON
+    home = LocationSerializerBase()
+    company_set = CompanySerializerWithHeadquarters(many=True)
+
+    class Meta(ContactSerializerBase.Meta):
+        fields = ContactSerializerBase.Meta.fields + ('home', 'company_set')

contacts_api/serializers_base.py

@@ -0,0 +1,8 @@
+from rest_framework import serializers 
+from .models import Contact 
+
+class ContactSerializerBase(serializers.ModelSerializer):
+    class Meta:
+        model = Contact # tell django which model to use
+        fields = ('id', 'name', 'age',) # tell django which fields to include
+

contacts_api/tests.py

@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.

contacts_api/urls.py

@@ -0,0 +1,7 @@
+from django.urls import path
+from . import views
+
+urlpatterns = [
+    path('api/contacts', views.ContactList.as_view(), name='contact_list'), # api/contacts will be routed to the ContactList view for handling
+    path('api/contacts/<int:pk>', views.ContactDetail.as_view(), name='contact_detail'), # api/contacts will be routed to the ContactDetail view for handling
+]

contacts_api/views.py

@@ -0,0 +1,12 @@
+from rest_framework import generics
+from .serializers import ContactSerializer
+from .models import Contact
+
+class ContactList(generics.ListCreateAPIView):
+    queryset = Contact.objects.all() # tell django how to retrieve all objects from the DB
+    serializer_class = ContactSerializer # tell django what serializer to use
+
+class ContactDetail(generics.RetrieveUpdateDestroyAPIView):
+    queryset = Contact.objects.all()
+    serializer_class = ContactSerializer
+

django_rest_api/asgi.py

@@ -0,0 +1,16 @@
+"""
+ASGI config for django_rest_api project.
+
+It exposes the ASGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/3.1/howto/deployment/asgi/
+"""
+
+import os
+
+from django.core.asgi import get_asgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'django_rest_api.settings')
+
+application = get_asgi_application()

django_rest_api/settings.py

@@ -0,0 +1,130 @@
+"""
+Django settings for django_rest_api project.
+
+Generated by 'django-admin startproject' using Django 3.1.7.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/3.1/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/3.1/ref/settings/
+"""
+
+from pathlib import Path
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/3.1/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = '(12(paz%k=r92df76nmdt$(cwdsw7k7=!*2vvd55ad+p%112!%'
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = []
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    'corsheaders', # add this
+    'contacts_api', # add this
+    'locations_api',
+    'companies_api',
+    'rest_framework',  # add this
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+]
+
+MIDDLEWARE = [
+    'corsheaders.middleware.CorsMiddleware', # this makes the cors package run for all requests.  A bit like app.use() in express
+    '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',
+]
+CORS_ALLOW_ALL_ORIGINS = True # add this
+
+ROOT_URLCONF = 'django_rest_api.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 = 'django_rest_api.wsgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/3.1/ref/settings/#databases
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.postgresql',
+        'NAME': 'django_api',
+        'USER': '',
+        'PASSWORD': '',
+        'HOST': 'localhost'
+    }
+}
+
+
+# Password validation
+# https://docs.djangoproject.com/en/3.1/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/3.1/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/3.1/howto/static-files/
+
+STATIC_URL = '/static/'

django_rest_api/urls.py

@@ -0,0 +1,25 @@
+"""django_rest_api URL Configuration
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/3.1/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  path('', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
+Including another URLconf
+    1. Import the include() function: from django.urls import include, path
+    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
+"""
+from django.contrib import admin
+from django.urls import path
+from django.conf.urls import include # add this
+
+urlpatterns = [
+    path('', include('contacts_api.urls')),
+    path('', include('locations_api.urls')),
+    path('', include('companies_api.urls')),
+    path('admin/', admin.site.urls),
+]

django_rest_api/wsgi.py

@@ -0,0 +1,16 @@
+"""
+WSGI config for django_rest_api 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/3.1/howto/deployment/wsgi/
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'django_rest_api.settings')
+
+application = get_wsgi_application()

locations_api/admin.py

@@ -0,0 +1,6 @@
+from django.contrib import admin
+
+# Register your models here.
+from .models import Location
+admin.site.register(Location)
+

locations_api/apps.py

@@ -0,0 +1,5 @@
+from django.apps import AppConfig
+
+
+class LocationsApiConfig(AppConfig):
+    name = 'locations_api'

locations_api/migrations/0001_initial.py

@@ -0,0 +1,23 @@
+# Generated by Django 3.1.7 on 2021-03-10 05:12
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Location',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('street', models.CharField(max_length=32)),
+                ('city', models.CharField(max_length=32)),
+                ('state', models.CharField(max_length=2)),
+            ],
+        ),
+    ]

locations_api/models.py

@@ -0,0 +1,7 @@
+from django.db import models
+
+# Create your models here.
+class Location(models.Model):
+    street = models.CharField(max_length=32)
+    city = models.CharField(max_length=32)
+    state = models.CharField(max_length=2)

locations_api/serializers.py

@@ -0,0 +1,10 @@
+from .serializers_base import LocationSerializerBase
+from contacts_api.serializers_base import ContactSerializerBase
+from companies_api.serializers_base import CompanySerializerBase
+
+class LocationSerializer(LocationSerializerBase): # serializers.ModelSerializer just tells django to convert sql to JSON
+    inhabitants = ContactSerializerBase(many=True)
+    companies = CompanySerializerBase(many=True)
+
+    class Meta(LocationSerializerBase.Meta):
+        fields = LocationSerializerBase.Meta.fields + ('inhabitants', 'companies')

locations_api/serializers_base.py

@@ -0,0 +1,7 @@
+from rest_framework import serializers
+from .models import Location
+
+class LocationSerializerBase(serializers.ModelSerializer): # serializers.ModelSerializer just tells django to convert sql to JSON
+    class Meta:
+        model = Location # tell django which model to use
+        fields = ('id', 'street', 'city', 'state')

locations_api/tests.py

@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.

locations_api/urls.py

@@ -0,0 +1,7 @@
+from django.urls import path
+from . import views
+
+urlpatterns = [
+    path('api/locations', views.LocationList.as_view(), name='location_list'), # api/contacts will be routed to the ContactList view for handling
+    path('api/locations/<int:pk>', views.LocationDetail.as_view(), name='location_detail'), # api/contacts will be routed to the ContactDetail view for handling
+]

locations_api/views.py

@@ -0,0 +1,11 @@
+from rest_framework import generics
+from .serializers import LocationSerializer
+from .models import Location
+
+class LocationList(generics.ListCreateAPIView):
+    queryset = Location.objects.all() # tell django how to retrieve all objects from the DB
+    serializer_class = LocationSerializer # tell django what serializer to use
+
+class LocationDetail(generics.RetrieveUpdateDestroyAPIView):
+    queryset = Location.objects.all()
+    serializer_class = LocationSerializer

manage.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+"""Django's command-line utility for administrative tasks."""
+import os
+import sys
+
+
+def main():
+    """Run administrative tasks."""
+    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'django_rest_api.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()