Struct LengthValidator

pub struct LengthValidator {
    pub min: Option<usize>,
    pub max: Option<usize>,
    pub exact: Option<usize>,
    pub message: Option<String>,
}

Validator for string/array length constraints

Fields

min: Option<usize>

Minimum length (inclusive)

max: Option<usize>

Maximum length (inclusive)

exact: Option<usize>

Exact length required

message: Option<String>

Custom error message

Implementations

impl LengthValidator

pub fn new() -> Self

Create a new length validator with no constraints

pub fn min(self, min: usize) -> Self

Set minimum length constraint

pub fn max(self, max: usize) -> Self

Set maximum length constraint

pub fn exact(self, exact: usize) -> Self

Set exact length requirement

pub fn range(self, min: usize, max: usize) -> Self

Set length range (min and max)

pub fn message(self, message: impl Into<String>) -> Self

Set custom error message

Trait Implementations

impl Clone for LengthValidator

fn clone(&self) -> LengthValidator

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LengthValidator

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for LengthValidator

fn default() -> Self

Returns the “default value” for a type.

impl ValidationRule for LengthValidator

fn validate<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, value: &'life1 Value, field: &'life2 str, ) -> Pin<Box<dyn Future<Output = ValidationResult<()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Validate a single value

fn rule_name(&self) -> &'static str

Get the validation rule name/type

fn parameters(&self) -> Option<Value>

Get validation rule parameters/configuration as JSON