[][src]Struct cosmwasm_storage::Bucket

pub struct Bucket<'a, S: Storage, T> where
    T: Serialize + DeserializeOwned
{ /* fields omitted */ }


impl<'a, S: Storage, T> Bucket<'a, S, T> where
    T: Serialize + DeserializeOwned

pub fn new(namespace: &[u8], storage: &'a mut S) -> Self[src]

pub fn multilevel(namespaces: &[&[u8]], storage: &'a mut S) -> Self[src]

pub fn save(&mut self, key: &[u8], data: &T) -> StdResult<()>[src]

save will serialize the model and store, returns an error on serialization issues

pub fn load(&self, key: &[u8]) -> StdResult<T>[src]

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>>[src]

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>, 

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

impl<'a, S, T> Send for Bucket<'a, S, T> where
    S: Send,
    T: Sync

impl<'a, S, T> Sync for Bucket<'a, S, T> where
    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

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

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

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.