Add examples/cookbook-plain to follow the plain tutorial

Author: Radoslav Georgiev

examples/cookbook-plain/README.md

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+Cookbook Example Django Project
+===============================
+
+This example project demos integration between Graphene and Django.
+The project contains two apps, one named `ingredients` and another
+named `recepies`.
+
+Getting started
+---------------
+
+First you'll need to get the source of the project. Do this by cloning the
+whole Graphene repository:
+
+```bash
+# Get the example project code
+git clone https://github.com/graphql-python/graphene-django.git
+cd graphene-django/examples/cookbook
+```
+
+It is good idea (but not required) to create a virtual environment
+for this project. We'll do this using
+[virtualenv](http://docs.python-guide.org/en/latest/dev/virtualenvs/)
+to keep things simple,
+but you may also find something like
+[virtualenvwrapper](https://virtualenvwrapper.readthedocs.org/en/latest/)
+to be useful:
+
+```bash
+# Create a virtualenv in which we can install the dependencies
+virtualenv env
+source env/bin/activate
+```
+
+Now we can install our dependencies:
+
+```bash
+pip install -r requirements.txt
+```
+
+Now setup our database:
+
+```bash
+# Setup the database
+./manage.py migrate
+
+# Load some example data
+./manage.py loaddata ingredients
+
+# Create an admin user (useful for logging into the admin UI
+# at http://127.0.0.1:8000/admin)
+./manage.py createsuperuser
+```
+
+Now you should be ready to start the server:
+
+```bash
+./manage.py runserver
+```
+
+Now head on over to
+[http://127.0.0.1:8000/graphql](http://127.0.0.1:8000/graphql)
+and run some queries!
+(See the [Graphene-Django Tutorial](http://docs.graphene-python.org/projects/django/en/latest/tutorial#testing-our-graphql-schema)
+for some example queries)

examples/cookbook-plain/cookbook/__init__.py

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+from django.contrib import admin
+
+from cookbook.ingredients.models import Category, Ingredient
+
+
+@admin.register(Ingredient)
+class IngredientAdmin(admin.ModelAdmin):
+    list_display = ('id', 'name', 'category')
+    list_editable = ('name', 'category')
+
+
+admin.site.register(Category)

examples/cookbook-plain/cookbook/ingredients/__init__.py

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+from django.apps import AppConfig
+
+
+class IngredientsConfig(AppConfig):
+    name = 'cookbook.ingredients'
+    label = 'ingredients'
+    verbose_name = 'Ingredients'

examples/cookbook-plain/cookbook/ingredients/admin.py

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+[{"model": "ingredients.category", "pk": 1, "fields": {"name": "Dairy"}}, {"model": "ingredients.category", "pk": 2, "fields": {"name": "Meat"}}, {"model": "ingredients.ingredient", "pk": 1, "fields": {"name": "Eggs", "notes": "Good old eggs", "category": 1}}, {"model": "ingredients.ingredient", "pk": 2, "fields": {"name": "Milk", "notes": "Comes from a cow", "category": 1}}, {"model": "ingredients.ingredient", "pk": 3, "fields": {"name": "Beef", "notes": "Much like milk, this comes from a cow", "category": 2}}, {"model": "ingredients.ingredient", "pk": 4, "fields": {"name": "Chicken", "notes": "Definitely doesn't come from a cow", "category": 2}}]

examples/cookbook-plain/cookbook/ingredients/apps.py

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+# -*- coding: utf-8 -*-
+# Generated by Django 1.9 on 2015-12-04 18:15
+from __future__ import unicode_literals
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Category',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=100)),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Ingredient',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=100)),
+                ('notes', models.TextField()),
+                ('category', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='ingredients', to='ingredients.Category')),
+            ],
+        ),
+    ]

examples/cookbook-plain/cookbook/ingredients/fixtures/ingredients.json

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+# -*- coding: utf-8 -*-
+# Generated by Django 1.9 on 2016-11-04 00:50
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('ingredients', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='ingredient',
+            name='notes',
+            field=models.TextField(blank=True, null=True),
+        ),
+    ]

examples/cookbook-plain/cookbook/ingredients/migrations/0001_initial.py

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+from django.db import models
+
+
+class Category(models.Model):
+    name = models.CharField(max_length=100)
+
+    def __str__(self):
+        return self.name
+
+
+class Ingredient(models.Model):
+    name = models.CharField(max_length=100)
+    notes = models.TextField(null=True, blank=True)
+    category = models.ForeignKey(Category, related_name='ingredients')
+
+    def __str__(self):
+        return self.name