Enum SingleRowTypedError

pub enum SingleRowTypedError {
    RowsExpected(RowsExpectedError),
    BadNumberOfRows(usize),
    FromRowError(FromRowError),
}

Variants

RowsExpected(RowsExpectedError)

QueryResult::single_row_typed() called on a bad QueryResult.
Expected QueryResult.rows to be Some, but it was None.
QueryResult.rows is Some for queries that can return rows (e.g SELECT).
It is None for queries that can’t return rows (e.g INSERT).

BadNumberOfRows(usize)

Expected a single row, found other number of rows

FromRowError(FromRowError)

Parsing row as the given type failed

Trait Implementations

impl Clone for SingleRowTypedError

fn clone(&self) -> SingleRowTypedError

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SingleRowTypedError

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

Formats the value using the given formatter.

impl Display for SingleRowTypedError

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

Formats the value using the given formatter.

impl Error for SingleRowTypedError

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<FromRowError> for SingleRowTypedError

fn from(source: FromRowError) -> Self

Converts to this type from the input type.

impl From<RowsExpectedError> for SingleRowTypedError

fn from(source: RowsExpectedError) -> Self

Converts to this type from the input type.

impl From<SingleRowError> for SingleRowTypedError

fn from(err: SingleRowError) -> SingleRowTypedError

Converts to this type from the input type.

impl PartialEq for SingleRowTypedError

fn eq(&self, other: &SingleRowTypedError) -> 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 Eq for SingleRowTypedError

impl StructuralPartialEq for SingleRowTypedError