min must be lower than max

[leontoeides]

Thank you for this crate. I really appreciate the validator crate too.

I'm getting an error with this crate when a length's min and max are set to the same value.

I would like for this field to be exactly 2 characters, no more and no less.

If this is invalid, how would I express in this in garde without a custom rule? Or maybe this is an oversight?

Thank you for the crate and your help!

error: `min` must be lower than `max`
   |
34 |     #[garde(length(min = 2, max = 2))]
   |                    ^^^

[jprochazk]

This is definitely a bug. It should be possible to set min and max to the same value, because the comparison ops used are < and >:

garde/garde/src/rules/length.rs

Lines 69 to 75 in bc4cdba

	if len < min {
	Err(InvalidLength::Min)
	} else if len > max {
	Err(InvalidLength::Max)
	} else {
	Ok(())
	}

For the time being, you can use a custom validator which just wraps rules::length:

#[derive(garde::Validate)]
struct Test {
    //                                                  min  max
    //                                                    v  v
    #[garde(custom(|v, _| garde::rules::length::apply(v, (2, 2))))]
    field: String,
}

// or as a reusable one:
fn len_eq_2<T: garde::rules::length::Length>(v: &T, _: &()) -> garde::Result {
    garde::rules::length::apply(v, (2, 2))
}

#[derive(Debug, garde::Validate)]
struct Test2 {
    #[garde(custom(len_eq_2))]
    field: String,
}

[jprochazk]

...or update to 0.11.2 🙂. Thanks for reporting!