Struct diesel::pg::PgMetadataCache

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pub struct PgMetadataCache { /* private fields */ }

Available on crate features postgres_backend and i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

Expand description

Cache for the OIDs of custom Postgres types

Implementations§

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impl PgMetadataCache

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pub fn new() -> Self

Construct a new PgMetadataCache

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pub fn lookup_type( &self, type_name: &PgMetadataCacheKey<'_>, ) -> Option<PgTypeMetadata>

Lookup the OID of a custom type

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pub fn store_type( &mut self, type_name: PgMetadataCacheKey<'_>, type_metadata: impl Into<InnerPgTypeMetadata>, )

Store the OID of a custom type

Trait Implementations§

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impl Default for PgMetadataCache

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fn default() -> PgMetadataCache

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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impl UnwindSafe for PgMetadataCache

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> Downcast for T
where T: Any,

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fn into_any(self: Box<T>) -> Box<dyn Any>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.

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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.

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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.

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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.

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impl<T> DowncastSync for T
where T: Any + Send + Sync,

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fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Send + Sync>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.

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