Inline Fragments

InlineFragments are used when querying an interface or union type, to determine which of the sub-types the query returned and to get at the fields inside that type.

InlineFragments can be derived on any enum that's variants contain a single type that implements QueryFragment. Each of the QueryFragments should have a graphql_type that maps to one of the sub-types of the graphql_type type for the InlineFragment.

For example, the GitHub API has an Assignee union type which could be queried with:

#![allow(unused_variables)]
fn main() {
#[derive(cynic::InlineFragments)]
#[cynic(
    schema_path = "github.graphql",
    query_module = "query_dsl",
    graphql_type = "Assignee"
)]
enum Assignee {
    Bot(Bot),
    Mannequin(Mannequin)
    Organization(Organization),
    User(User)
}
}

Where each of Bot, Mannequin, Organization & User are all structs that implement QueryFragment for the respective GraphQL types.