Struct ValidationError 

pub struct ValidationError {
    pub errors: Vec<FieldValidationError>,
}

Validation error for field-level and model-level validation.

Fields

errors: Vec<FieldValidationError>

The errors grouped by field name (or “_model” for model-level)

Implementations

impl ValidationError

pub fn new() -> Self

Create a new empty validation error container.

pub fn is_empty(&self) -> bool

Check if there are any validation errors.

pub fn add( &mut self, field: impl Into<String>, kind: ValidationErrorKind, message: impl Into<String>, )

Add a field validation error.

pub fn add_min( &mut self, field: impl Into<String>, min: impl Display, actual: impl Display, )

Add a min value error.

pub fn add_max( &mut self, field: impl Into<String>, max: impl Display, actual: impl Display, )

Add a max value error.

pub fn add_multiple_of( &mut self, field: impl Into<String>, divisor: impl Display, actual: impl Display, )

Add a multiple_of error.

Used when a numeric value is not a multiple of the specified divisor.

pub fn add_min_items( &mut self, field: impl Into<String>, min: usize, actual: usize, )

Add a min_items error for collections.

Used when a collection has fewer items than the minimum required.

pub fn add_max_items( &mut self, field: impl Into<String>, max: usize, actual: usize, )

Add a max_items error for collections.

Used when a collection has more items than the maximum allowed.

pub fn add_unique_items( &mut self, field: impl Into<String>, duplicate_count: usize, )

Add a unique_items error for collections.

Used when a collection contains duplicate items.

pub fn add_min_length( &mut self, field: impl Into<String>, min: usize, actual: usize, )

Add a min length error.

pub fn add_max_length( &mut self, field: impl Into<String>, max: usize, actual: usize, )

Add a max length error.

pub fn add_pattern(&mut self, field: impl Into<String>, pattern: &str)

Add a pattern match error.

pub fn add_required(&mut self, field: impl Into<String>)

Add a required field error.

pub fn add_custom( &mut self, field: impl Into<String>, message: impl Into<String>, )

Add a custom validation error.

pub fn add_model_error(&mut self, message: impl Into<String>)

Add a model-level validation error.

Model-level validators check cross-field constraints or validate the entire model state. The error is recorded with field “model”.

pub fn add_credit_card(&mut self, field: impl Into<String>)

Add a credit card validation error.

pub fn into_result(self) -> Result<(), Self>

Convert to Result, returning Ok(()) if no errors, Err(self) otherwise.

Trait Implementations

impl Clone for ValidationError

fn clone(&self) -> ValidationError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ValidationError

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

Formats the value using the given formatter.

impl Default for ValidationError

fn default() -> Self

Returns the “default value” for a type.

impl Display for ValidationError

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

Formats the value using the given formatter.

impl Error for ValidationError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<ValidationError> for Error

fn from(err: ValidationError) -> Self

Converts to this type from the input type.