pub struct Item<'a, T> { /* private fields */ }
Expand description

Item stores one typed item at the given key. This is an analog of Singleton. It functions the same way as Path does but doesn’t use a Vec and thus has a const fn constructor.

Implementations

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

load will return an error if no data is set at the given key, or on parse error

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

Loads the data, perform the specified action, and store the result in the database. This is shorthand for some common sequences, which may be useful.

It assumes, that data was initialized before, and if it doesn’t exist, Err(StdError::NotFound) is returned.

If you import the proper Item from the remote contract, this will let you read the data from a remote contract in a type-safe way using WasmQuery::RawQuery.

Note that we expect an Item to be set, and error if there is no data there

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

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

Should always be Self

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.