Derive Macro Validate 

#[derive(Validate)]
{
    // Attributes available to this derive:
    #[validate]
}

Available on crate feature macros only.

Derive Validate for a named-field struct.

Annotate fields with #[validate(...)] rules. All failures are collected before returning, so the caller sees every invalid field in one response.

Supported validators

Syntax	Checks
length(min = N)	field.chars().count() >= N
length(max = N)	field.chars().count() <= N
length(min = N, max = N)	both bounds
range(min = N)	field as f64 >= N
range(max = N)	field as f64 <= N
range(min = N, max = N)	both bounds
email	local part, @, domain with .
required	!field.is_empty()
url	starts with http:// or https://

Example

#[derive(rust_web_server::Validate)]
struct CreateUser {
    #[validate(length(min = 1, max = 50))]
    name: String,
    #[validate(email)]
    email: String,
    #[validate(range(min = 0, max = 150))]
    age: u8,
}