Crate typewriter_graphql 

typewriter-graphql

GraphQL Schema Definition Language (SDL) emitter for the typewriter type sync SDK. Generates .graphql type definitions, enums, and unions from Rust structs and enums.

Type Mappings

Rust Type	GraphQL Type
String	String
bool	Boolean
u8, u16, u32, i8, i16, i32	Int
f32, f64	Float
Uuid	ID
DateTime<Utc>	DateTime (custom scalar)
Option<T>	Nullable (no !)
Vec<T>	[T!]
HashMap<K, V>	JSON (custom scalar)

Configuration

In typewriter.toml:

[graphql]
output_dir = "./generated/graphql"
file_style = "snake_case"   # snake_case (default), kebab-case, or PascalCase

Example

Rust Input:

#[derive(TypeWriter)]
#[sync_to(graphql)]
pub struct User {
    pub id: String,
    pub email: String,
    pub age: Option<u32>,
}

Generated GraphQL SDL:

scalar DateTime
scalar JSON

type User {
  id: ID!
  email: String!
  age: Int
}

Structs

GraphQLMapper

GraphQL SDL language mapper.