axum-valid

This crate provides a Valid type that can be used in combination with Json, Path, Query, and Form extractors to validate the entities that implement the Validate trait from the validator crate.

Additional extractors like TypedHeader, MsgPack, Yaml etc. are supported through optional features. The full list of supported extractors is in the Features section below.

Usage

cargo add axum-valid

use validator::Validate;
use serde::Deserialize;
use axum_valid::Valid;
use axum::extract::Query;
use axum::Json;

#[derive(Debug, Validate, Deserialize)]
pub struct Pager {
    #[validate(range(min = 1, max = 50))]
    pub page_size: usize,
    #[validate(range(min = 1))]
    pub page_no: usize,
}

pub async fn get_page_by_query(
    Valid(Query(pager)): Valid<Query<Pager>>,
) {
    assert!((1..=50).contains(&pager.page_size));
    assert!((1..).contains(&pager.page_no));
}

pub async fn get_page_by_json(
    Valid(Json(pager)): Valid<Json<Pager>>,
) {
    assert!((1..=50).contains(&pager.page_size));
    assert!((1..).contains(&pager.page_no));
}

When validation errors occur, the extractor will automatically return 400 with validation errors as the HTTP message body.

Features

Feature	Description	Default	Tests
default	Enables support for Path, Query, Json and Form	✅	✅
json	Enables support for Json	✅	✅
query	Enables support for Query	✅	✅
form	Enables support for Form	✅	✅
typed_header	Enables support for TypedHeader	❌	✅
typed_multipart	Enables support for TypedMultipart from axum_typed_multipart	❌	✅
msgpack	Enables support for MsgPack and MsgPackRaw from axum-msgpack	❌	✅
yaml	Enables support for Yaml from axum-yaml	❌	✅
extra	Enables support for Cached, WithRejection from axum-extra	❌	✅
extra_query	Enables support for Query from axum-extra	❌	✅
extra_form	Enables support for Form from axum-extra	❌	✅
extra_protobuf	Enables support for Protobuf from axum-extra	❌	✅
all_extra_types	Enables support for all extractors above from axum-extra	❌	✅
all_types	Enables support for all extractors above	❌	✅
422	Use 422 Unprocessable Entity instead of 400 Bad Request as the status code when validation fails	❌	✅
into_json	Validation errors will be serialized into JSON format and returned as the HTTP body	❌	✅
full	Enables all features	❌	✅

License

This project is licensed under the MIT License.

References

• axum
• validator
• serde