Enum StateReadError

pub enum StateReadError {
    Query(AcquireThenQueryError),
    NoEntry(Key),
    OutOfRange {
        key: Key,
        num_values: usize,
    },
}

Any errors that might occur in the [View][crate::state::View]’s StateRead implementation.

Variants

Query(AcquireThenQueryError)

A state query to the underlying DB connection pool failed.

NoEntry(Key)

No entry exists for the given key.

OutOfRange

Key out of range.

Fields

key: Key

num_values: usize

Trait Implementations

impl Debug for StateReadError

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

Formats the value using the given formatter.

impl Display for StateReadError

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

Formats the value using the given formatter.

impl Error for StateReadError

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<AcquireThenError<QueryError>> for StateReadError

fn from(source: AcquireThenQueryError) -> Self

Converts to this type from the input type.