参数

Arguments
  (Argument list)
Argument
  Name:Value

Fields are conceptually functions which return values, and occasionally accept arguments which alter their behavior. These arguments often map directly to function arguments within a GraphQL server’s implementation.

In this example, we want to query a specific user (requested via theidargument) and their profile picture of a specificsize:

{
  user(id: 4) {
    id
    name
    profilePic(size: 100)
  }
}

Many arguments can exist for a given field:

{
  user(id: 4) {
    id
    name
    profilePic(width: 100, height: 50)
  }
}

Arguments are unordered

Arguments may be provided in any syntactic order and maintain identical semantic meaning.

These two queries are semantically identical:

{
  picture(width: 200, height: 100)
}

{
  picture(height: 100, width: 200)
}