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LinkStore

meta_language::storage

Trait LinkStore 

Source 
pub trait LinkStore {
    // Required methods
    fn create(
        &mut self,
        references: &[LinkId],
        metadata: LinkMetadata,
    ) -> Result<LinkId, StorageError>;
    fn read(&self, id: LinkId) -> Result<Option<Link>, StorageError>;
    fn update(
        &mut self,
        id: LinkId,
        references: &[LinkId],
        metadata: LinkMetadata,
    ) -> Result<bool, StorageError>;
    fn delete(&mut self, id: LinkId) -> Result<bool, StorageError>;
    fn search(&self, query: &LinkStoreQuery) -> Result<Vec<Link>, StorageError>;

    // Provided method
    fn count(&self, query: &LinkStoreQuery) -> Result<usize, StorageError> { ... }
}
Expand description

Storage trait for create/read/update/delete/search over meta-language links.

Required Methods§

Source

fn create( &mut self, references: &[LinkId], metadata: LinkMetadata, ) -> Result<LinkId, StorageError>

Creates a link and returns its stable id.

§Errors

Returns StorageError when the backend cannot write the link.

Source

fn read(&self, id: LinkId) -> Result<Option<Link>, StorageError>

Reads a link by id.

§Errors

Returns StorageError when the backend cannot read its storage.

Source

fn update( &mut self, id: LinkId, references: &[LinkId], metadata: LinkMetadata, ) -> Result<bool, StorageError>

Replaces an existing link’s references and metadata.

§Errors

Returns StorageError when the backend cannot write the update.

Source

fn delete(&mut self, id: LinkId) -> Result<bool, StorageError>

Deletes a link by id.

§Errors

Returns StorageError when the backend cannot delete the link.

Source

fn search(&self, query: &LinkStoreQuery) -> Result<Vec<Link>, StorageError>

Returns links matching query.

§Errors

Returns StorageError when the backend cannot search its storage.

Provided Methods§

Source

fn count(&self, query: &LinkStoreQuery) -> Result<usize, StorageError>

Counts links matching query.

§Errors

Returns StorageError when the backend cannot search its storage.

Implementors§