Quiz Application

Simple Quiz Application backend made with NestJS, GraphQL and PostgreSQL.

How to run

1. Clone the project
2. Create PostgreSQL database
3. Create .env in the root directory using this template and replace question marks with your database information
4. Install dependancies using npm install
5. After installing all of the packages run npm run start:dev
6. Use localhost:3000/graphql URL to get to the GraphQL Playground in order to write queries and mutations

Queries and Mutations examples

GraphQL schema available here.

1. Create new quiz

mutation{
  createQuiz(createQuizData: {
    name: "Quiz"
    questions: [
      { 
        text: "What is the capital of France?"
        type: SINGLE_ANSWER
        options: ["Warsaw", "Paris", "Madrid", "Oslo"]
        answer: "1" 
        # answer is a string of indexes of options in options array field					
      },
      { 
        text: "Arrange the following events in chronological order."
        type: SORTING 
        options: [
          "Declaration of Independence",
          "First Moon Landing", 
        	"World War II"
        ]
        answer: "021"
      }
    ]
  })
}

2. Get all quizzes

query{
  getQuizzes {
    id
    name
    questions{
      id
      text
      type
      options
      answer
    }
  }
}

3. Remove quiz

mutation{
  	removeQuiz(id: 12)
  # id is necessary because name
  # of a quiz doesn't have to be unique
}

4. Fetch questions for a quiz

query{
  fetchQuestionsForQuiz(id: 1){
    id
    text
    type
    options
    answer
  }
}

5. Submit answers and receive results

mutation {
  checkAnswers(
    attemptData: {
      quizId: 1
      questions: [
        { questionId: 1, givenAnswer: "" }
        { questionId: 2, givenAnswer: "021" }
      ]
    }
  ) {
    score
    maximumScore
  }
}