Enum StateProjectionError 

pub enum StateProjectionError {
    DuplicateKey(String),
    MissingKey(String),
    UnknownKeys(Vec<String>),
    RequiredSlotAbsent(String),
    Cardinality {
        expected: usize,
        actual: usize,
    },
    Exception(Exception),
}

Error declaring, restoring, or evaluating a keyed state projection.

Variants

DuplicateKey(String)

A projection declared the same key more than once.

MissingKey(String)

A projected key was absent from the supplied snapshot.

UnknownKeys(Vec<String>)

The supplied snapshot contains keys absent from the projection.

RequiredSlotAbsent(String)

A required slot was absent in the supplied snapshot.

Cardinality

A compiled state vector has the wrong number of present values.

Fields

expected: usize

The number of present values declared by the layout.

actual: usize

The supplied value count.

Exception(Exception)

The upstream runtime rejected an operation needed to restore state.

Trait Implementations

impl Debug for StateProjectionError

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

Formats the value using the given formatter.

impl Display for StateProjectionError

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

Formats the value using the given formatter.

impl Error for StateProjectionError

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<Exception> for StateProjectionError

fn from(source: Exception) -> Self

Converts to this type from the input type.

impl From<StateProjectionError> for IoError

fn from(source: StateProjectionError) -> Self

Converts to this type from the input type.

impl From<StateProjectionError> for Exception

fn from(error: StateProjectionError) -> Self

Converts to this type from the input type.

impl PartialEq for StateProjectionError

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