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Full Stack Trivia API Project

This project is a game where users can test their knowledge answering trivia questions. The task for the project was to create an API and test suite for implementing the following functionality:

  1. Display questions - both all questions and by category. Questions should show the question, category and difficulty rating by default and can show/hide the answer.
  2. Delete questions.
  3. Add questions and require that they include question and answer text.
  4. Search for questions based on a text query string.
  5. Play the quiz game, randomizing either all questions or within a specific category.

Getting Started

Installing Dependencies

Developers using this project should already have Python3, pip, node, and npm installed.

Frontend Dependencies

This project uses NPM to manage software dependencies. NPM Relies on the package.json file located in the frontend directory of this repository. After cloning, open your terminal and run:

npm install

Backend Dependencies

Once you have your virtual environment setup and running, install dependencies by naviging to the /backend directory and running:

pip install -r requirements.txt

Running the Frontend in Dev Mode

The frontend app was built using create-react-app. In order to run the app in development mode use npm start. You can change the script in the package.json file.

Open http://localhost:3000 to view it in the browser. The page will reload if you make edits.

npm start

Running the Server

From within the backend directory first ensure you are working using your created virtual environment.

To run the server, execute:

export FLASK_APP=flaskr
export FLASK_ENV=development
flask run

Testing

To run the tests, run

dropdb trivia_test
createdb trivia_test
psql trivia_test < trivia.psql
python test_flaskr.py

Omit the dropdb command the first time you run tests.

API Reference

Getting Started

  • Base URL: This application hosted locally. @ http://127.0.0.1:5000/
  • Authentication: Not required.

Error Handling

Errors are returned as JSON for example:

    {
        "success": False,
        "error": 404,
        "message": "resource not found"
    }

There are three types of return JSON:

  • 400 – bad request
  • 404 – resource not found
  • 422 – unprocessable

Endpoints

GET method '/categories'

  • General: Return all categories in list shape.
  • Run: curl localhost/categories
        {
            "categories": {
                "1": "Science", 
                "2": "Art", 
                "3": "Geography", 
                ....
            }, 
            "success": true
        }

GET method '/questions'

  • General:

    • Returns:
      • paginated dictionary of 10 questions.
      • request type (success: True, False).
      • total question.
      • categories
  • Run: curl localhost/questions

  • The result:

   {
        "categories": {
            "1": "Science", 
            "2": "Art", 
            "3": "Geography", 
            "4": "History", 
            "5": "Entertainment", 
            "6": "Sports"
        }, 
        "questions": [
            {
            "answer": "Maya Angelou", 
            "category": 4, 
            "difficulty": 2, 
            "id": 5, 
            "question": "Whose autobiography is entitled 'I Know Why the Caged Bird Sings'?"
            }, 
            {
            "answer": "Muhammad Ali", 
            "category": 4, 
            "difficulty": 1, 
            "id": 9, 
            "question": "What boxer's original name is Cassius Clay?"
            }, 
            {
            "answer": "Apollo 13", 
            "category": 5, 
            "difficulty": 4, 
            "id": 2, 
            "question": "What movie earned Tom Hanks his third straight Oscar nomination, in 1996?"
            }, 
            {
            "answer": "Tom Cruise", 
            "category": 5, 
            "difficulty": 4, 
            "id": 4, 
            "question": "What actor did author Anne Rice first denounce, then praise in the role of her beloved Lestat?"
            }, 
            {
            "answer": "Edward Scissorhands", 
            "category": 5, 
            "difficulty": 3, 
            "id": 6, 
            "question": "What was the title of the 1990 fantasy directed by Tim Burton about a young man with multi-bladed appendages?"
            }, 
            {
            "answer": "Brazil", 
            "category": 6, 
            "difficulty": 3, 
            "id": 10, 
            "question": "Which is the only team to play in every soccer World Cup tournament?"
            }, 
            {
            "answer": "Uruguay", 
            "category": 6, 
            "difficulty": 4, 
            "id": 11, 
            "question": "Which country won the first ever soccer World Cup in 1930?"
            }, 
            {
            "answer": "George Washington Carver", 
            "category": 4, 
            "difficulty": 2, 
            "id": 12, 
            "question": "Who invented Peanut Butter?"
            }, 
            {
            "answer": "Lake Victoria", 
            "category": 3, 
            "difficulty": 2, 
            "id": 13, 
            "question": "What is the largest lake in Africa?"
            }, 
            {
            "answer": "The Palace of Versailles", 
            "category": 3, 
            "difficulty": 3, 
            "id": 14, 
            "question": "In which royal palace would you find the Hall of Mirrors?"
            }
        ], 
        "success": true, 
        "total_questions": 19
        }

DELETE method '/questions/int:id\'

  • General:
    • Deletes a question by id.
    • Returns:
      • Request type (success: True, False).
      • Deleted question ID.
      • total questions after delete.
      • Dictionary of paginated qustions.
  • Try: curl -X DELETE localhost/questions/19

POST method '/questions'

  • General:

    • Creates a new question.
    • Returns:
      • Request type (success: True, False).
      • ID of the new qustion created.
      • The created qustion data.
      • Total of qustions after created.
  • Try:

>>> $ curl --header "Content-Type: application/json" \
>>> --request POST \
>>> --data '{"question":"<your qustion>","answer":"<your answer>", "category": <category>, "difficulty":<difficulty>}' \
>>> localhost/questions'

POST method '/questions/search?<title='searchTerm'>'

  • General:
    • Searches for questions using search term in url with title term in JSON request parameters.
    • Returns JSON object with paginated matching questions.
  • Sample: curl -X POST localhost/questions/search -H "Content-Type: application/json" -d '{"title": "Egyptians"}'
  • The result:
            "questions": [
                {
                "answer": "Maya Angelou", 
                "category": 4, 
                "difficulty": 2, 
                "id": 5, 
                "question": "Whose autobiography is entitled 'I Know Why the Caged Bird Sings'?"
                }, 
                {
                "answer": "Muhammad Ali", 
                "category": 4, 
                "difficulty": 1, 
                "id": 9, 
                "question": "What boxer's original name is Cassius Clay?"
                }, 
                ...
                ], 
            "success": true, 
            "total_questions": Integer
        }

GET method '/categories/<int:id>/questions'

  • General:

    • Gets questions by category id using url parameters.
    • Returns:
      • Request type (success: True, False).
      • Dictionary of paginated qustions.
      • Total qustions.
      • Category.
  • Try: curl localhost/categories/1/questions

POST Method '/quizzes'

  • General:
    • Get a new qustion to play the game.
    • The request should be in JSON of category and previous questions data.
    • Returns a new question based on previous questions in data provided.
  • Try:
    curl -X POST localhost/quizzes -H "Content-Type: application/json" -d {"previous_questions": [20, 21], "quiz_category": 1

note:

If:`curl localhost/` dose not work for you, try to use: `curl http://127.0.0.1:5000/`.

Author

Obada Al Ahdab authored the API (__init__.py), test suite (test_flaskr.py), and this README.
This project was created by Udacity as a part of the [Full Stack Web Developer Nanodegree].