GraphQL查询并检查返回的数据 [英] GraphQL query and check the returned data

问题描述

我想要一个包含支票的查询，例如，在查询用户时，只需要具有非空电子邮件的用户.我如何添加这种支票?谢谢！

I would like to have a query containing a check, for example when querying users, only users that have a non-null email are wanted. How could I add such check? Thanks!

users {
  id,
  username,
  email
}

推荐答案

GraphQL字段可以带有参数. 因此，您可以将一个名为onlyNonNullEmail: boolean的参数传递给您的users字段:

GraphQL fields can have arguments. So you could pass an argument to your users field, named onlyNonNullEmail: boolean:

type Query {
  users(onlyNonNullEmail: Boolean) {
    ...
  }
}

然后，在您的resolve函数中:

Then, inside your resolve function:

users: (_, args, context, ast) => {
  const { onlyNonNullEmail } = args;

  // If onlyNonNullEmail is true, return only users with a non-null email
  // Else proceed as usual
}

这篇关于GraphQL查询并检查返回的数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！