Trait ErrorResponse 

pub trait ErrorResponse { }

Derive macro that automatically implements axum::IntoResponse for a enum containing possible handler errors.

Example:

#[derive(ErrorResponse)]
enum RegisterError {
    #[err(status = 400, message = "This name is already taken")]
    NameAlreadyTaken,
    #[err(status = 400, message = "This username is too short. Use at least 8 characters.")]
    UsernameTooShort,
}
 
async fn handler() -> Result<(), RegisterError> {
    if name_is_taken() {
        return Err(RegisterError::NameAlreadyTaken); // Now you can return these enum variants in any handler!
    }
 
    ... 
}

All attribute fields:

• status - Determines the response status (Default if not specified: 500);
• message - This message is going to be shown in the error response body (Default if not specified: “Internal server error”);

Implementors