Struct LengthRule 

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

String length validation rule.

Validates that a string’s length is within specified bounds.

Fields

min: Option<usize>

Minimum length (inclusive)

max: Option<usize>

Maximum length (inclusive)

message: Option<String>

Custom error message

Implementations

impl LengthRule

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

Create a length rule with min and max bounds.

pub fn min(min: usize) -> Self

Create a length rule with only a minimum.

pub fn max(max: usize) -> Self

Create a length rule with only a maximum.

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

Set a custom error message.

Trait Implementations

impl Clone for LengthRule

fn clone(&self) -> LengthRule

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LengthRule

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for LengthRule

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<LengthRule> for SerializableRule

fn from(rule: LengthRule) -> Self

Converts to this type from the input type.

impl PartialEq for LengthRule

fn eq(&self, other: &LengthRule) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for LengthRule

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl ValidationRule<String> for LengthRule

fn validate(&self, value: &String) -> Result<(), RuleError>

Validate the value against this rule.

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

Get the rule name/code for error reporting.

fn default_message(&self) -> String

Get the default error message for this rule.

impl ValidationRule<str> for LengthRule

fn validate(&self, value: &str) -> Result<(), RuleError>

Validate the value against this rule.

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

Get the rule name/code for error reporting.

fn default_message(&self) -> String

Get the default error message for this rule.

impl StructuralPartialEq for LengthRule