Struct StringSchema 

pub struct StringSchema { /* private fields */ }

Schema representing string constraints and mapping metadata.

Implementations

impl StringSchema

pub fn new() -> Self

Creates a new StringSchema with no validation constraints.

pub fn min_length(self, n: usize) -> Self

Constrains the string to have a minimum character count of $N$.

pub fn max_length(self, n: usize) -> Self

Constrains the string to have a maximum character count of $M$.

pub fn non_empty(self) -> Self

Constrains the string to be non-empty.

pub fn alphanumeric(self) -> Self

Constrains the string to contain only alphanumeric characters.

pub fn email(self) -> Self

Restricts the string format to standard email addresses.

pub fn url(self) -> Self

Restricts the string format to absolute URLs.

pub fn regex(self, pattern: &str) -> Self

Matches the string value against a custom Rust regular expression pattern.

pub fn default(self, val: &str) -> Self

Configures a fallback default value used when this field is missing.

pub fn alias(self, name: &str) -> Self

Registers a field key rename mapping for parsing input payloads.

pub fn required(self) -> Self

Configures the schema to strictly fail if the field is absent.

pub fn optional(self) -> Self

Registers the field as optional (permits Null values).

pub fn strict(self) -> Self

Opts into strict validation mode: non-string inputs cause immediate failure instead of coercion.

pub fn get_alias(&self) -> Option<&str>

Returns the registered key alias name if defined.

Trait Implementations

impl Default for StringSchema

fn default() -> StringSchema

Returns the “default value” for a type.

impl SchemaValidator for StringSchema

fn validate(&self, value: &Value, field: &str) -> Result<(), ValidationError>

Validates the given Value against the structural rules of this schema.

fn is_required(&self) -> bool

Returns true if the field must be supplied and lacks a default value.

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

Yields the fallback Value if this optional/default field is omitted.

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

Static string representing the readable type name.