Enum QueryOneError

pub enum QueryOneError {
    NoSuchEntity,
    Unsatisfied,
}

Errors that arise when querying a single entity

Variants

NoSuchEntity

The entity was already despawned

Unsatisfied

The entity exists but does not satisfy the query

Trait Implementations

impl Clone for QueryOneError

fn clone(&self) -> QueryOneError

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for QueryOneError

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

Formats the value using the given formatter.

impl Display for QueryOneError

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

Formats the value using the given formatter.

impl Error for QueryOneError

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<NoSuchEntity> for QueryOneError

fn from(_: NoSuchEntity) -> QueryOneError

Converts to this type from the input type.

impl Hash for QueryOneError

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for QueryOneError

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

impl StructuralPartialEq for QueryOneError