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ViewContext

spacetimedb

Struct ViewContext 

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pub struct ViewContext {
    pub db: LocalReadOnly,
    pub from: QueryBuilder,
    /* private fields */
}
Expand description

One of two possible types that can be passed as the first argument to a #[view]. The other is AnonymousViewContext. Use this type if the view depends on the caller’s identity.

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§db: LocalReadOnly§from: QueryBuilder

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impl ViewContext

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pub fn new(sender: Identity) -> Self

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pub fn sender(&self) -> Identity

The Identity of the client that invoked the view.

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pub fn as_anonymous(&self) -> AnonymousViewContext

Obtain an AnonymousViewContext by dropping sender.

Trait Implementations§

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impl CtxDbRead for ViewContext

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fn db_read_only(&self) -> &LocalReadOnly

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impl CtxWithSender for ViewContext

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fn sender(&self) -> Identity

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impl DbContext for ViewContext

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type DbView = LocalReadOnly

👎Deprecated:

Use the capability based traits (CtxDbRead, CtxDbWrite) instead!

A view into the tables of a database. Read more
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fn db(&self) -> &Self::DbView

👎Deprecated:

Use the capability based traits (CtxDbRead, CtxDbWrite) instead!

Get a view into the tables. Read more
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fn db_read_only(&self) -> &LocalReadOnly

👎Deprecated:

Use the capability based traits (CtxDbRead, CtxDbWrite) instead!

Get a read-only view into the tables. Read more

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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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where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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fn borrow_mut(&mut self) -> &mut T

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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type Output = T

Should always be Self
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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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type Error = <U as TryFrom<T>>::Error

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