Lab 27: Django Models

Overview

Build out a project with one model and wire up that model using Django Views.

Feature Tasks

Model

• create snack_tracker_project project
• create snacks app
• add snacks app to project
• create Snack model
  • make sure it extends from proper base class
  • add name as a CharField with maximum length of 64 characters.
  • add purchaser ForeignKey related to Django’s built in user model with CASCADE delete option.
    • from django.contrib.auth import get_user_model
  • add description TextField
• add model to admin
• modify Snack model have user friendly display in admin
• create migrations and migrate data
• create a super user
• run development server
• add a few snacks via Admin panel
• create another user and more snacks via Admin panel
• confirm that snacks behave as expected with proper name, purchaser and description.

Views for Snacks App

• Where to create these views?
  • Dig around and see if there’s a sensible spot.
  • HINT There is one correct place for your app’s views.
• create SnackListView
  • extend ListView
  • give a template of snack_list.html
  • associate Snack model
• update url patterns for project
  • empty path should include snacks.urls
• update snacks app urls
  • empty sub-path should be handled by SnackListView
    • Don’t forget to use as_view()
• add detail view
  • link snack_detail.html template
  • associate Snack model
• update app urlpatterns to handle detail view
  • account for primary key in url
  • path would look like localhost:8000/1/ to get to snack with id of 1

Templates

• add templates folder in root of project
  • register templates folder in project settings TEMPLATES section
• create base.html ancestor template
  • add main html document
  • use Django Templating Language to allow child templates to insert content
• create snack_list.html template
  • extend base template
  • use Django Templating Language to display each snack’s name
• view home page (aka snack_list) and confirm snacks showing properly
• create snack_detail.html template
  • template should extend base
  • content should display snack’s name, description and purchaser
• add link in snack_list template to related detail page for each snack
• add a link back to Home (aka snack_list) page from detail page.

Setup

1. Create a virtual environment --> python –m venv .venv
2. Activate the virtual environment --> source .venv/bin/activate (for Linux and MacOS); ..venv\Scripts\activate (for Windows)
3. Install Django --> pip install django
4. Create and start a Django project --> django-admin startproject djangho_snack_tracker_project .
5. Set up migrations --> python manage.py migrate
6. Run development server --> python manage.py runserver
7. Create a Django app --> python manage.py startapp snacks
8. Need to complete 3 steps before making migrations: TUV --> (1) templates (folder with base.html), (2) urls (in snacks folder), and (3) views(in snacks folder)
9. Make and apply migrations --> python manage.py makemigrations snacks
10. Apply the migrations --> python manage.py runserver
11. Create a super user as the administator of the site --> python manage.py createsuperuser

username: admin

email address: admin@admin.com

password: admin

12. Test that the TUV and migrations worked in the development server
13. Add /admin to the end of the local host url to log in with the admin credentials
14. Add /1 to the end of the local host to see the first item

Tests

python manage.py test