graphql-migration-blog-schema-step.js

// src/controller/graphqlController.js

const graphqlHTTP = require('express-graphql');
const { buildSchema } = require('graphql');

// Construct a schema, using GraphQL schema language
const schema = buildSchema(`
  type Query {
    employee(id: Int!): Employee     # `!` signifies this is mandatory 
    employees: [Employee],
  }
  type Mutation {
      createEmployee(name: String!, department: String!): Employee,
      deleteEmployee(id: Int!): DeleteEmployeeResponse
  }
  input EmployeeInput {
      name: String!,
      department: String!
  }
  type DeleteEmployeeResponse {
    id: Int!
  }
  type Employee {
    id: Int!,
    name: String!,
    department: String!
  }
`);

// todo -> tie up this schema with GraphQL and the service to call one Query and Mutation