Crate fastapi_macros 

Procedural macros for fastapi_rust.

This crate provides the following macros:

• Route macros: #[get], #[post], #[put], #[delete], #[patch], #[head], #[options]
• #[derive(Validate)] for compile-time validation
• #[derive(JsonSchema)] for OpenAPI schema generation

Role In The System

fastapi-macros is the compile-time glue that keeps the runtime minimal. It analyzes handler signatures, generates route registration metadata, and enforces validation/schema rules without any runtime reflection. The emitted code targets types from fastapi-core and fastapi-openapi, and is re-exported by the fastapi facade crate for user ergonomics.

Example

use fastapi::prelude::*;

#[get("/items/{id}")]
async fn get_item(cx: &Cx, id: Path<i64>) -> Json<Item> {
    // ...
}

Attribute Macros

delete

Mark a function as a DELETE handler.

get

Mark a function as a GET handler.

head

Mark a function as a HEAD handler.

options

Mark a function as an OPTIONS handler.

patch

Mark a function as a PATCH handler.

post

Mark a function as a POST handler.

put

Mark a function as a PUT handler.

Derive Macros

JsonSchema

Derive JSON Schema for OpenAPI.

Validate

Derive validation for a struct.