nodejs+express+graphql app

this is kind of reminder based on this blog post

before moving forward you have check if current packages installed (latest versions)

• nodejs
• yarn

to run server

yarn run server

requset to fetch one course:

request

query getSingleCourse($courseID: Int!) {
  course(id: $courseID) {
    title
    author
    description
    topic
    url
  }
}

queryVariables

{
  "courseID": 1
}

requset to fetch all courses by topic:

request

query getAllCourse($topic: String!) {
  courses(topic: $topic) {
    title
    author
    description
    url
  }
}

queryVariables

{
  "topic": "Node.js"
}

requset to fetch data with aliases & fragments:

request

query getCourseWithFragments($courseID1: Int!, $courseID2: Int!) {
  course1: course(id: $courseID1) {
    ...courseFields
  },
  course2: course(id: $courseID2) {
    ...courseFields
  } 
}
fragment courseFields on Course {
  title
  author
  description
  topic
  url
}

queryVariables

{
  "courseID1": 1,
  "courseID2": 3
}

mutation requset (change author):

request

mutation updateCourseAuthor($id: Int!, $author: String!) {
  updateCourseAuthor(id: $id, author: $author) {
    ... courseFields
  }
}
fragment courseFields on Course {
  title
  author
  description
  topic
  url
}

queryVariables

{
  "id": 1,
  "author": "Some Random Author"
}