Coffee Shop Project

The Coffee Shop #3 projects in Udacity's Full-Stack Nanodegree has been one of the toughest projects to complete with me. In an effort to help others who may be on the same boat with me. Normally I would not post and waste my time but I feel I should because Udacity's Student support sucks. They have the Chats,  but no one replies to you. They have the mentor, but they never contact you. I have not had any contact with the "Mentors", they forums suck, I asked for help and no one replies. You are alone and have to figure out by yourself.


Some might say, thats good because it forces you to find solutions. Yes, but not everyone is going to be on the same knowledge level. I am fortunate because I have taken other nanodegrees and know what they are looking for and familiar with the technologies they use. For example:


  1. Python - They use python as the  backend.
  2. Flask - They  use Flask as the development server
  3. PostgreSQL -  Thye like teaching you SQL databases with PostgreSQL


I am unfamiliar with neither of these until I started the course. I use Linux, Apache, MySQL & PHP for my Backend. I wish they would cover these technologies in their program but they don't so I have to learn new things. Don't get me wrong, I am in for learning, the issue here is the support they provide.


Alright, enough about Udacity, lets get down to what you need to do in order to successfully complete the project.

1. Repository

By now you should know how to download or "clone" their FSND repo. So lets go by which files you will need to modify:

  • backend/src/ -
    • for this file, you will need to create the end points. Very easy to do, if you followed their tutorials, they give you the answers in the video they guys walks you though how to create the end points.
    • You also should know how to create the end points form the previous project #2 - Nothing new here. In the they provide you with examples:
    • @app.route('/greeting', methods=['GET'])
      def greeting_all():
          return jsonify({'greetings': greetings})
    • Be sure to uncomment the database code db_drop_and_create_all() to build the database in the first run.
  • backend/ -
    • For this file, you need to create the functions which perform the authorization/permissions check, this is the boiler template they provide, for example, these are the methods you will need:
    • def get_token_auth_header():
    • def check_permissions(permission, jwt):
    • def verify_decode_jwt(jwt):
    • def requires_auth(permission=''):
  • frontend/src/environments/environments.ts - you will need to provide the settings. this one is easy, you get this information from the Auth0 application you created.


Note I had a big problem with Auth0 creating the callback URL with http://localhost - Auth0 does not allow localhost nor http - You MUST use the local IP address and HTTPS protocol, so you callback should be:

Error! Payload validaton error: 'Object didn't pass validation for format absoulte-uri-or-empty: https://localhost:5000/login on property initiate_login_uri(initiate login ur, just be https and cannot contain a fragment)

you will have to run you local servers on the backend and frontend to allow https. for python use  the option and for ionic use the ssl option

don't forget to check your code with pycodestyle more info at

To start your backend server try this command:

flask run --reload --cert=adhoc

to start your frontend server, try this command

ionic serve -c --ssl --external --host=

To be a successful project and get it approved, you MUST pass all API calls in Postman, your runner should look like the image I posted above.

This is how the front end should look like:


Hope that helps you.