Struct ValidationError 

pub struct ValidationError {
    pub field: FieldPath,
    pub message: String,
    pub expected: Option<String>,
    pub actual: Option<String>,
}

Validation error with full field context.

Provides structured error information including:

• The field path where the error occurred
• A human-readable error message
• Optional expected and actual values for debugging

This type is JSON-serializable for IDE integration and tooling.

Example

use debtmap::effects::validation::{FieldPath, ValidationError};

let error = ValidationError::at_field(
    &FieldPath::new("threshold"),
    "must be greater than zero"
).with_context("positive integer", "-5");

assert_eq!(error.field.as_string(), "threshold");
assert_eq!(error.expected, Some("positive integer".to_string()));
assert_eq!(error.actual, Some("-5".to_string()));

Fields

field: FieldPath

The field path where the error occurred.

message: String

Human-readable error message.

expected: Option<String>

Expected value or constraint (for debugging).

actual: Option<String>

Actual value that failed validation (for debugging).

Implementations

impl ValidationError

pub fn at_field(field: &FieldPath, message: impl Into<String>) -> Self

Create a validation error at a specific field.

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

Create a validation error with a simple field name.

pub fn with_context( self, expected: impl Into<String>, actual: impl Into<String>, ) -> Self

Add expected and actual context to the error.

pub fn with_expected(self, expected: impl Into<String>) -> Self

Add expected value context.

pub fn with_actual(self, actual: impl Into<String>) -> Self

Add actual value context.

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 Eq for ValidationError

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ValidationError

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ValidationError