QuestionAnswers

This a test project, using GraphQL, Sangria and Neo4j, for posting questions and answers by users. You can checkout the fron-end part of this project questionasnwers-react-relay

Latest Schema with subscription and pagination:

schema {
  query: Query
  mutation: mutation
  subscription: subscription
}

scalar DateTime

type mutation {
  createUser(userId: Int!, name: String!): User!
  createQuestion(text: String!, answer: String!, postedBy: Int!): Question!
}

type PageInfo {
  hasNextPage: Boolean!
  hasPreviousPage: Boolean!
  startCursor: String!
  endCursor: String!
}

type Query {
  users: [User!]!
  user(userId: Int!): User
  questions: [Question!]!
  pagedquestions(first: Int!, after: String): QuestionConnection
  question(text: String!): Question
}

type Question {
  text: String!
  answer: String!
  postedBy: Int!
  createdAt: DateTime!
  user: User
}

type QuestionConnection {
  pageInfo: PageInfo!
  edges: [QuestionEdge!]!
  count: Int!
}

type QuestionEdge {
  node: Question!
  cursor: String!
}

type subscription {
  questionCreated: Question!
  userCreated: User!
}

type User {
  userId: Int!
  name: String!
  questions: [Question!]!
  lastQuestion: Question!
}

type test {
 id: ID!
}

You can create users by using mutation

mutation createuser{
  createUser(id:1, name: "ramesh maharjan"){
    id
    name
  }
}

You can create questions by using mutation

mutation createQ{
  createQuestion(text:"what is this?", answer: "this is testing", postedBy: 1){
  	text
    answer
    postedBy
  }
}

createuser and createQ are just names given to mutations which can be ignored or excluded

By using above mutations, nodes in Neo4j database should be created

Now its time to do queries

You can get the list of all users by using following query

query getusers{
  users{
    id
    name
  }
}

You can get a user information by doing

query getuser{
  user(id: 1){
    id
    name
  }
}

You can get a user info with latest question he/she posted by doing

query getuserwithlatestQuestion{
  user(id: 1){
    id
    name
    lastQuestion{
      text
      answer
      createdAt
    }
  }
}

You can get a user information with all the question and the latest question he/she has posted by doing

query getuserwithquestionsandlatestQuestion{
  user(id: 1){
    id
    name
    questions{
      text
      answer
      createdAt
    }
    lastQuestion{
      text
    }
  }
}

Just play around !!!