For this assessment, you'll be working on an API for tracking heroes and their superpowers.

In this repo, there is a Flask application with some features built out. There is also a fully built React frontend application, so you can test if your API is working.

Your job is to build out the Flask API to add the functionality described in the deliverables below.

To download the dependencies for the frontend and backend, run:

pipenv install
npm install --prefix client

There is some starter code in the app/seed.py file so that once you've generated the models, you'll be able to create data to test your application.

You can run your Flask API on localhost:5555 by running:

python app.py

You can run your React app on localhost:4000 by running:

npm start --prefix client

You are not being assessed on React, and you don't have to update any of the React code; the frontend code is available just so that you can test out the behavior of your API in a realistic setting.

There are also tests included which you can run using pytest -x to check your work.

Depending on your preference, you can either check your progress by:

• Running pytest -x and seeing if your code passes the tests
• Running the React application in the browser and interacting with the API via the frontend
• Running the Flask server and using Postman to make requests

You need to create the following relationships:

• A Hero has many Powers through HeroPower
• A Power has many Heros through HeroPower
• A HeroPower belongs to a Hero and belongs to a Power

Start by creating the models and migrations for the following database tables:

Add any code needed in the model files to establish the relationships.

Then, run the migrations and seed file:

flask db upgrade
python app/seed.py

If you aren't able to get the provided seed file working, you are welcome to generate your own seed data to test the application.

Add validations to the HeroPower model:

• strength must be one of the following values: 'Strong', 'Weak', 'Average'

Add validations to the Power model:

• description must be present and at least 20 characters long

Set up the following routes. Make sure to return JSON data in the format specified along with the appropriate HTTP verb.

Return JSON data in the format below:

[
  { "id": 1, "name": "Kamala Khan", "super_name": "Ms. Marvel" },
  { "id": 2, "name": "Doreen Green", "super_name": "Squirrel Girl" },
  { "id": 3, "name": "Gwen Stacy", "super_name": "Spider-Gwen" }
]

If the Hero exists, return JSON data in the format below:

{
  "id": 1,
  "name": "Kamala Khan",
  "super_name": "Ms. Marvel",
  "powers": [
    {
      "id": 1,
      "name": "super strength",
      "description": "gives the wielder super-human strengths"
    },
    {
      "id": 2,
      "name": "flight",
      "description": "gives the wielder the ability to fly through the skies at supersonic speed"
    }
  ]
}

If the Hero does not exist, return the following JSON data, along with the appropriate HTTP status code:

{
  "error": "Hero not found"
}

Return JSON data in the format below:

[
  {
    "id": 1,
    "name": "super strength",
    "description": "gives the wielder super-human strengths"
  },
  {
    "id": 1,
    "name": "flight",
    "description": "gives the wielder the ability to fly through the skies at supersonic speed"
  }
]

If the Power exists, return JSON data in the format below:

{
  "id": 1,
  "name": "super strength",
  "description": "gives the wielder super-human strengths"
}

If the Power does not exist, return the following JSON data, along with the appropriate HTTP status code:

{
  "error": "Power not found"
}

This route should update an existing Power. It should accept an object with the following properties in the body of the request:

{
  "description": "Updated description"
}

If the Power exists and is updated successfully (passes validations), update its description and return JSON data in the format below:

{
  "id": 1,
  "name": "super strength",
  "description": "Updated description"
}

If the Power does not exist, return the following JSON data, along with the appropriate HTTP status code:

{
  "error": "Power not found"
}

If the Power is not updated successfully (does not pass validations), return the following JSON data, along with the appropriate HTTP status code:

{
  "errors": ["validation errors"]
}

This route should create a new HeroPower that is associated with an existing Power and Hero. It should accept an object with the following properties in the body of the request:

{
  "strength": "Average",
  "power_id": 1,
  "hero_id": 3
}

If the HeroPower is created successfully, send back a response with the data related to the Hero:

{
  "id": 1,
  "name": "Kamala Khan",
  "super_name": "Ms. Marvel",
  "powers": [
    {
      "id": 1,
      "name": "super strength",
      "description": "gives the wielder super-human strengths"
    },
    {
      "id": 2,
      "name": "flight",
      "description": "gives the wielder the ability to fly through the skies at supersonic speed"
    }
  ]
}

If the HeroPower is not created successfully, return the following JSON data, along with the appropriate HTTP status code:

{
  "errors": ["validation errors"]
}