Enum BackendCapabilityError 

#[non_exhaustive]
pub enum BackendCapabilityError {
    RowLockingUnsupported {
        backend: BackendKind,
    },
    Unsupported {
        backend: BackendKind,
        feature: Feature,
    },
}

A feature was requested that the backend does not support.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

RowLockingUnsupported

select_for_update on a backend without row locking.

Fields

backend: BackendKind

Backend that rejected the request.

Unsupported

Any other unsupported feature.

Fields

backend: BackendKind

Backend that rejected the request.

feature: Feature

The unsupported feature.

Implementations

impl BackendCapabilityError

pub fn from_feature(backend: BackendKind, feature: Feature) -> Self

Build the most specific error variant for feature.

Trait Implementations

impl Clone for BackendCapabilityError

fn clone(&self) -> BackendCapabilityError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BackendCapabilityError

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

Formats the value using the given formatter.

impl Display for BackendCapabilityError

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

Formats the value using the given formatter.

impl Eq for BackendCapabilityError

impl Error for BackendCapabilityError

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<BackendCapabilityError> for OrmError

fn from(source: BackendCapabilityError) -> Self

Converts to this type from the input type.

impl PartialEq for BackendCapabilityError

fn eq(&self, other: &BackendCapabilityError) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for BackendCapabilityError