Struct ValidationErrors 

pub struct ValidationErrors { /* private fields */ }

Field failures, keyed by field name, in field order.

A BTreeMap rather than a HashMap so the JSON body a client receives is deterministic — otherwise the same invalid request would produce a different key order each time, which makes responses awkward to snapshot, cache or diff.

Implementations

impl ValidationErrors

pub fn new() -> Self

No failures.

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

Record a failure against field.

pub fn is_empty(&self) -> bool

Whether anything failed.

pub fn len(&self) -> usize

How many fields failed.

pub fn has(&self, field: &str) -> bool

Whether field failed.

pub fn get(&self, field: &str) -> &[String]

Every message for field.

pub fn first(&self, field: &str) -> Option<&str>

The first message for field.

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

The first message across every field.

pub fn all_messages(&self) -> Vec<&str>

Every message, flattened.

pub fn fields(&self) -> Vec<&str>

Every failing field name.

pub fn to_json(&self) -> Value

As the JSON payload a client receives: {"field": ["message", …]}.

Trait Implementations

impl Clone for ValidationErrors

fn clone(&self) -> Self

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() -> Self

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 From<ValidationErrors> for Error

fn from(errors: ValidationErrors) -> Self

A 422 carrying the failures as structured details, which the HTTP layer renders without knowing anything about validation.

impl PartialEq for ValidationErrors

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ValidationErrors