擅长:python、mysql、java
<p>你可以这样写,如下所示。
它应该对你有用</p>
<pre><code>schema {
query: Query
}
type Query {
GetMealMix(identity_id: ID!, date: AWSDate!): [MealMix]
}
union MealMix = Meal | OtherMeal
type Meal {
name: String
}
type OtherMeal {
name: String
}
query {
GetMealMix(identity_id: "this", date: "2020-11-20") {
... on Meal {name}
... on OtherMeal {name}
}
}
</code></pre>
<p>您可以从以下URL获取参考:
<a href="https://docs.aws.amazon.com/appsync/latest/devguide/interfaces-and-unions.html" rel="nofollow noreferrer">Interfaces and unions in GraphQL</a></p>