CCN Demo.graphql

// Query
{
  user {
    cat? {
      name!
      age
    }
  }
}

// Response without CCN
{
  errors: [],
  data: {
    user: {
      cat: {
        name: null,
        age: 1
      }
    }
  }
}

// Response with ! only
{
  errors: [
    {
      locations: [{ column: 13, line: 4 }],
      message: 'Cannot return null for non-nullable field User.Cat.name.',
      path: ['user', 'cat', 'name'],
      handledPath: undefined
    }
  ],
  data: {
    user: {
      cat: null
    }
  }
}


// Response with ! and ?
{
  errors: [
    {
      locations: [{ column: 13, line: 4 }],
      message: 'Cannot return null for non-nullable field User.Cat.name.',
      path: ['user', 'cat', 'name'],
      handledPath: ['user', 'cat'],
      lostData: {
        name: null,
        age: 1
      }
    }
  ],
  data: {
    user: {
      cat: null
    }
  }
}