英文:
Is it possible to build GraphQL query where the second part of the query depends on the result of the first one?
问题
我有一个设置，在前端通过路由器（Apollo Federation Gateway）运行查询到两个分别提供GQL端点的服务 - serviceA有findItems，serviceB有parseName。
现在我想一次运行以下查询：
query findMyItemDescriptionNameAndParse {
findItems(id: 1) {
description {
name
}
}
parseName(input: $name) {
parsedName {
name
}
}
}
Apollo能否在内部传递变量，还是我必须将查询拆分成两个查询来处理这种情况？
谢谢。
英文:
I have a setup where I run a query on the frontend through the router (Apollo Federation Gateway) to two separate services exposing GQL endpoints - serviceA has findItems and serviceB has parseName.
Now I want to run the following query in one go:
query findMyItemDescriptionNameAndParse {
findItems(id: 1) {
description {
name
}
}
parseName(input: $name) {
parsedName {
name
}
}
}
Can Apollo pass the variables internally or I just have to split the query into two for such case?
Thank you.
答案1
得分: 1
短答案：不行。您需要依次运行这两个查询。然而，更好的方法是定义一个不同的查询，返回您所需要的name和parsedName。甚至更好的方法是扩展description以包括一个parsedName字段，然后只需为其编写一个解析程序，这样您就不需要运行顺序查询。
英文:
Short answer: no. You'd have to run the two queries in sequence. What's preferable however is to define a different query that returns both the name and parsedName that you're looking for. Even better would be to extend the description to include a parsedName field and just write a resolver for that then you'd never need to run sequential queries.
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