Enum QueryError 

#[non_exhaustive]
pub enum QueryError {
    UnregisteredComponent {
        name: String,
    },
    WrongStorageKind {
        name: String,
    },
    ConflictingFilters {
        detail: String,
    },
    DuplicateMutableComponent {
        name: String,
    },
    WrongOwner,
    StaleCache,
    WrongQuery {
        detail: String,
    },
    MovingChangeWindow,
    UnsupportedCachePolicy {
        detail: String,
    },
    ExactIdOrderConflict,
    DuplicateExactId {
        entity: EntityId,
    },
    MissingExactId {
        entity: EntityId,
    },
    BorrowConflict {
        detail: String,
    },
    CommandRejected {
        detail: String,
    },
    OwnerMismatch,
    TraversalAborted {
        entity: EntityId,
        detail: String,
    },
}

Failure while resolving, traversing, caching, or mutating through a query.

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.

UnregisteredComponent

Query referenced a component type that is not registered in the world schema.

Fields

name: String

WrongStorageKind

Query traversal expected a different storage kind for the named component.

Fields

name: String

ConflictingFilters

Query spec combined incompatible structural or temporal filters.

Fields

detail: String

DuplicateMutableComponent

Mutable traversal requested the same component type more than once.

Fields

name: String

WrongOwner

Query handle or cursor belongs to a different world owner.

StaleCache

Membership or result cache handle is stale for its slot and generation.

WrongQuery

Cursor, cache, event, or plan does not match the active query configuration.

Fields

detail: String

MovingChangeWindow

Result-cache policy cannot serve added/changed moving windows.

UnsupportedCachePolicy

Prepared-query materialization policy is incompatible with the resolved plan.

Fields

detail: String

ExactIdOrderConflict

Exact-id order conflicts with a result cache that reorders matches.

DuplicateExactId

Exact-id list contains the same entity more than once.

Fields

entity: EntityId

MissingExactId

Exact-id policy requires every listed entity to be available.

Fields

entity: EntityId

BorrowConflict

Query traversal cannot borrow world state for the requested operation.

Fields

detail: String

CommandRejected

Deferred command or bundle write was rejected before enqueue.

Fields

detail: String

OwnerMismatch

Cache handle owner token does not match the active world.

TraversalAborted

Mutable traversal stopped early because a callback returned an error.

Fields

entity: EntityId

detail: String

Trait Implementations

impl Clone for QueryError

fn clone(&self) -> QueryError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryError

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

Formats the value using the given formatter.

impl Display for QueryError

Available on crate feature std only.

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

Formats the value using the given formatter.

impl Eq for QueryError

impl Error for QueryError

Available on crate feature std only.

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 PartialEq for QueryError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for QueryError