GraphQL-将枚举值直接传递给突变作为参数吗？ [英] GraphQL - Passing an enum value directly to a mutation as an argument?

问题描述

给出以下GraphQL类型定义：

Given the following GraphQL type definition:

const typeDefs = `
  enum Action {
    update
    delete
  }    

  type Mutation {
    doSomething(action: Action)
  }
`;

此查询有效：

const query = `
  mutation($action: Action) {
    doSomething(action: $action)
  }
`
const variables = { action: "update" }

但是，这不是：

const query = `
  mutation {
    doSomething(action: "update")
  }
`

GraphQL不支持直接将枚举值作为参数传递吗？

Does GraphQL not support passing an enum value directly as an argument?

推荐答案

GraphQL确实支持将枚举直接作为参数传递。但是，您需要省略该值周围的引号才能使其起作用：

GraphQL does support passing the enum directly as an argument; however, you'll need to omit the quotation marks around the value to get it to work:

const query = `
  mutation {
    doSomething(action: update)
  }
`

根据规范：

枚举值表示为未加引号的名称（例如MOBILE_WEB）。

Enum values are represented as unquoted names (ex. MOBILE_WEB).

所以与字符串不同值，枚举值不应放在引号内。我们将它们用于变量的唯一原因是遵循正确的JSON格式。

So unlike a string value, an enum value should not be put inside quotation marks. The only reason we do so when using them for variables is to follow proper JSON formatting.

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