GraphQL server example

This is a simple GraphQL server example using graphql-yoga, Mongoose and MongoDB.

To start the server:

• start MongoDB on your local machine
• npm run start

Go to http://localhost:3000/playground to launch the GraphQL Playground.

Queries

All sensors:

{
  sensors {
    sensorName
    type
    location
    _id
  }
}

All sensorValues:

{
  sensorValues {
    temp
    humidity
    time
    _id
    sensor {
      sensorName
      type
      location
      _id
    }
  }
}

A sensor:

{
  sensor(_id: "5eba09502ba39cfe8fd331cd") {
    sensorName
    type
    location
    _id
  }
}

A sensorValue:

{
  sensorValue(_id: "5ebb20231b0fc015e75c0e0f") {
    temp
    humidity
    time
    _id
    sensor {
      sensorName
      type
      location
      _id
    }
  }
}

Mutations

Create a sensor:

mutation {
  createSensor(
    sensorName: "Freezer Sensor 1"
    type: "Arduino Uno"
    location: "Main freezer"
  ) {
    sensorName
    type
    location
    _id
  }
}

Create a sensorValue:

mutation {
  createSensorValue(
    temp: 25.4
    humidity: 82.2
    time: "2020-05-12T03:29:10.040Z"
    sensorId: "5eba1b5315de6001af4c8614"
  ) {
    temp
    humidity
    time
    _id
    sensor {
      sensorName
      type
      location
      _id
    }
  }
}

Update a sensor:

mutation {
  updateSensor(
    _id: "5eba1ff3f550ab0288d69922"
    sensorName: "New Freezer Sensor"
    type: "Raspberry Pi"
    location: "Main freezer"
  ) {
    sensorName
    type
    location
    _id
  }
}

Update a sensorValue:

mutation {
  updateSensorValue(
    _id: "5eba1ff3f550ab0288d69929"
    temp: 2.4
    humidity: 82.2
    time: "2020-05-12T03:29:10.040Z"
    sensorId: "5eba1ff3f550ab0288d69923"
  ) {
    temp
    humidity
    time
    _id
    sensor {
      sensorName
      type
      location
      _id
    }
  }
}

Delete a sensor:

mutation {
  deleteSensor(_id: "5eba1b5315de6001af4c8614")
}

Delete a sensorValue:

mutation {
  deleteSensorValue(_id: "5eba1bb198fbcd01cdb25acb")
}

Tools

• graphql-yoga
• Mongoose