Module field_selection 

Type-driven GraphQL field selection.

Each type that implements GraphQLFields knows how to describe its own GraphQL selection string. Generated types return all their scalar fields. Consumers can define custom lean types with only the fields they need — the struct shape is the query shape.

The FullType associated type provides compile-time validation:

• Generated types implement GraphQLFields with FullType = Self
• Custom types use #[graphql(full_type = X)] to validate fields at compile time

Traits

FieldCompatible

Marker trait for compile-time field type compatibility.

GraphQLFields

Trait implemented by types that know their GraphQL field selection.