Struct ValidationErrors 

pub struct ValidationErrors {
    pub fields: HashMap<String, Vec<String>>,
    pub non_field: Vec<String>,
}

A collection of per-field validation errors. Forms accumulate these and return the whole map at once.

Fields

fields: HashMap<String, Vec<String>>

Per-field error messages. Each field’s vec may carry multiple messages (e.g. both Required and Pattern fire).

non_field: Vec<String>

Cross-field errors that don’t belong to one field. Use for “password and confirm don’t match”, etc.

Implementations

impl ValidationErrors

pub fn new() -> Self

Construct an empty error set.

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

Add an error to one field. Multiple calls accumulate.

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

Add a cross-field error.

pub fn is_empty(&self) -> bool

Has any error been recorded?

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

Convert to Result<(), ValidationErrors>, returning Ok(()) when no errors have accumulated. Use as the last step in a form’s validate method.

Trait Implementations

impl Clone for ValidationErrors

fn clone(&self) -> ValidationErrors

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ValidationErrors

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

Formats the value using the given formatter.

impl Default for ValidationErrors

fn default() -> ValidationErrors

Returns the “default value” for a type.

impl Display for ValidationErrors

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

Formats the value using the given formatter.

impl Eq for ValidationErrors

impl Error for ValidationErrors

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<ValidationErrors> for WriteError

Lift the form-primitive ValidationErrors into the canonical WriteError. Each per-field message becomes a WriteError::Validator { field, message }; non-field messages become an Anonymous validator carrying the bare message. Wrapped under WriteError::Multiple when there’s more than one.

fn from(e: ValidationErrors) -> Self

Converts to this type from the input type.

impl From<ValidationErrors> for FormErrors

fn from(e: ValidationErrors) -> Self

Converts to this type from the input type.

impl PartialEq for ValidationErrors

fn eq(&self, other: &ValidationErrors) -> 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 StructuralPartialEq for ValidationErrors