Struct Validator 

pub struct Validator { /* private fields */ }

Fluent builder that collects field errors and converts to AppError via Validator::validate.

Implementations

impl Validator

pub fn new() -> Self

Create a new empty validator.

pub fn required(self, field: &str, value: &str) -> Self

Fail if value is empty or whitespace-only.

pub fn min_length(self, field: &str, value: &str, min: usize) -> Self

Fail if value has fewer than min characters.

pub fn max_length(self, field: &str, value: &str, max: usize) -> Self

Fail if value exceeds max characters.

pub fn email(self, field: &str, value: &str) -> Self

Fail if value is not a valid e-mail address.

pub fn url(self, field: &str, value: &str) -> Self

Fail if value is not a valid HTTP/HTTPS URL.

pub fn pattern(self, field: &str, value: &str, re: &str) -> Self

Fail if value does not match the regular expression re.

pub fn required_uuid(self, field: &str, value: &str) -> Self

Fail if value is not a valid UUID string.

pub fn optional_uuid(self, field: &str, value: Option<&str>) -> Self

Fail if value is Some but not a valid UUID string.

pub fn in_range<T: PartialOrd + Display>( self, field: &str, value: T, min: T, max: T, ) -> Self

Fail if value is outside the inclusive range [min, max].

pub fn min_value<T: PartialOrd + Display>( self, field: &str, value: T, min: T, ) -> Self

Fail if value is below min.

pub fn max_value<T: PartialOrd + Display>( self, field: &str, value: T, max: T, ) -> Self

Fail if value is above max.

pub fn before(self, field: &str, value: &str, deadline: &str) -> Self

Fail if value (ISO-8601 datetime string) is not before deadline.

pub fn after(self, field: &str, value: &str, floor: &str) -> Self

Fail if value (ISO-8601 datetime string) is not after floor.

pub fn one_of<T: PartialEq + Display>( self, field: &str, value: &T, allowed: &[T], ) -> Self

Fail if value is not in allowed.

pub fn custom(self, condition: bool, field: &str, message: &str) -> Self

Add an error for field if condition is false.

pub fn has_errors(&self) -> bool

Returns true if any validation errors have been accumulated.

pub fn errors(&self) -> &[FieldError]

Returns a slice of all accumulated field errors.

pub fn validate(self) -> AppResult<()>

Consume the validator and return Ok(()) if no errors, or an AppError::invalid_input containing all field errors.

Trait Implementations

impl Debug for Validator

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

Formats the value using the given formatter.

impl Default for Validator

fn default() -> Validator

Returns the “default value” for a type.