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Imagine the following query:
query { user { id } SomeOtherStuff(id: <--- I want to pass the id obtained from user) { id } } How do you pass a parameter obtained from one query to another ?
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Multiple arguments can be used together in the same query. For example, you can use the where argument to filter the results and then use the order_by argument to sort them.
When setting up a field whose value is a custom type, we have to define a function that tells GraphQL how to get that custom type. In our case, we want to tell GraphQL how to get the posts if we have the author. We do that by defining a new root property inside resolvers.
The __typename field returns the object type's name as a String (e.g., Book or Author ). GraphQL clients use an object's __typename for many purposes, such as to determine which type was returned by a field that can return multiple types (i.e., a union or interface).
In GraphQL, fields at each "level" of the request are executed and resolved in parallel. In your example, user and SomeOtherStuff are both fields of the same type (the root Query type) -- so they will be resolved at the same time. That means each query essentially is not aware of the other or what the other resolved to.
You would have to handle this kind of scenario client side. In other words, request the user first, parse the response for the id and then make the second request.
Edit: In Apollo, you would utilize compose for this purpose:
const userQuery = gql`query User { user { id } }`; const stuffQuery = gql`query SomeOtherStuff($id: ID) { someOtherStuff(id: $id){ stuff } }`; export default compose( graphql(userQuery, { name: 'userData' }) graphql(stuffQuery, { name: 'stuffData', options: ({userData:{id}={}}) => ({variables: {id}}) }), )(YourComponent) If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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