[−][src]Struct cosmwasm_storage::Bucket
Implementations
impl<'a, S: Storage, T> Bucket<'a, S, T> where
T: Serialize + DeserializeOwned,
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T: Serialize + DeserializeOwned,
pub fn new(namespace: &[u8], storage: &'a mut S) -> Self
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pub fn multilevel(namespaces: &[&[u8]], storage: &'a mut S) -> Self
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pub fn save(&mut self, key: &[u8], data: &T) -> StdResult<()>
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save will serialize the model and store, returns an error on serialization issues
pub fn load(&self, key: &[u8]) -> StdResult<T>
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load will return an error if no data is set at the given key, or on parse error
pub fn may_load(&self, key: &[u8]) -> StdResult<Option<T>>
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may_load will parse the data stored at the key if present, returns Ok(None) if no data there. returns an error on issues parsing
pub fn update<A>(&mut self, key: &[u8], action: A) -> StdResult<T> where
A: FnOnce(Option<T>) -> StdResult<T>,
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A: FnOnce(Option<T>) -> StdResult<T>,
update will load the data, perform the specified action, and store the result
in the database. This is shorthand for some common sequences, which may be useful.
Note that this only updates pre-existing values. If you want to modify possibly
non-existent values, please use may_update
This is the least stable of the APIs, and definitely needs some usage
Auto Trait Implementations
impl<'a, S, T> RefUnwindSafe for Bucket<'a, S, T> where
S: RefUnwindSafe,
T: RefUnwindSafe,
S: RefUnwindSafe,
T: RefUnwindSafe,
impl<'a, S, T> Send for Bucket<'a, S, T> where
S: Send,
T: Sync,
S: Send,
T: Sync,
impl<'a, S, T> Sync for Bucket<'a, S, T> where
S: Sync,
T: Sync,
S: Sync,
T: Sync,
impl<'a, S, T> Unpin for Bucket<'a, S, T>
impl<'a, S, T> !UnwindSafe for Bucket<'a, S, T>
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,