Struct ChangeSet 

pub struct ChangeSet { /* private fields */ }

What a unit of work has waiting, for whoever implements one: new, changed and deleted records, one change per record.

Implementations

impl ChangeSet

pub fn list(&self) -> &[Change]

What waits, in the order it came.

pub fn clear(&mut self)

Throws it all away.

pub fn touches(&self, entity: &str) -> bool

Whether anything waits for this entity.

pub fn save( &mut self, entity: &EntityInfo, object: Object, exists: bool, ) -> Result<(), SpaceError>

Marks a record as new or changed. exists says whether storage has its key.

pub fn insert( &mut self, entity: &EntityInfo, object: Object, exists: bool, ) -> Result<(), SpaceError>

Marks a record as new, refusing a key in use. exists says whether storage has it.

pub fn delete(&mut self, entity: &EntityInfo, key: &Value, exists: bool)

Marks a record to go away. exists says whether storage has it.

pub fn overlay(&self, entity: &EntityInfo, rows: &mut BTreeMap<String, Object>)

Puts what waits on top of what storage has, by key.

Trait Implementations

impl Clone for ChangeSet

fn clone(&self) -> ChangeSet

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ChangeSet

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ChangeSet

fn default() -> ChangeSet

Returns the “default value” for a type.