GraphQL.js Todo App Example

This is a ToDo app example that uses GraphQL.js, Sinatra and GraphQL-Ruby.

Samples

This implementation includes following features:

• Queries
• Mutations
• Subscriptions (Live via EventSource)

Installation

git clone https://github.com/f/graphql.js-demo
cd graphql.js-demo

bundle install
ruby app.rb

# Your server will be started on http://localhost:4567

The Focus

The main focus here to create GraphQL JavaScript clients easily. Please read the following code to see how easy to query a GraphQL server.

var graph = graphql("/graphql", {
  alwaysAutodeclare: true,
  fragments: {
    todo: `on Todo {
      id
      text
      isCompleted
    }`
  }
})

function getTodos() {
  return graph.query.run(`allTodos { ...todo }`)
}

function addTodo(text) {
  return graph.mutate(`todoAdd(text: $text) { ...todo }`)({
    text: text
  })
}

function setTodo(id, isCompleted) {
  return graph.mutate(`todoComplete(id: $id, status: $isCompleted) { ...todo }`)({
    "id!ID": id,
    isCompleted: isCompleted
  })
}

function removeTodo(id) {
  return graph.mutate(`todoRemove(id: $id) { ...todo }`)({
    "id!ID": id
  })
}

Subscriptions

This includes EventSource model of subscriptions.

var source = new EventSource(`/graphql?query=
  subscription ($id: ID!) {
    todoAdded(id: $id) {
      id
      text
    }
    todoUpdated(id: $id) {
      id
      isCompleted
    }
    todoRemoved(id: $id) {
      id
    }
  }`)
source.addEventListener('graphql.todoAdded', function (message) {
  var data = JSON.parse(message.data)
  var todo = data.data.todoAdded
  todos.innerHTML += "<li id='" + todo.id + "'>" + todo.text + "</li>"
})
source.addEventListener('graphql.todoRemoved', function (message) {
  var data = JSON.parse(message.data)
  var todo = data.data.todoRemoved
  var el = document.querySelector("li#" + todo.id)
  todos.removeChild(el)
})
source.addEventListener('graphql.todoUpdated', function (message) {
  var data = JSON.parse(message.data)
  var todo = data.data.todoUpdated
  var el = document.querySelector("li#" + todo.id)
  el.className = "completed"
})

License

MIT License

Copyright (c) 2017 Fatih Kadir Akın

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.