Struct ValidationError 

pub struct ValidationError {
    pub field: String,
    pub message: String,
    pub value: Option<String>,
    pub constraint: Option<String>,
}

Validation error containing detailed information about what failed

Fields

field: String

Field name that failed validation

message: String

Human-readable error message

value: Option<String>

Optional value that failed (for debugging)

constraint: Option<String>

Optional constraint that was violated

Implementations

impl ValidationError

pub fn new(field: impl Into<String>, message: impl Into<String>) -> Self

Create a new validation error

pub fn with_value(self, value: impl Into<String>) -> Self

Set the value that failed validation

pub fn with_constraint(self, constraint: impl Into<String>) -> Self

Set the constraint that was violated

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 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 PartialEq for ValidationError

fn eq(&self, other: &ValidationError) -> 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 ValidationError