Transaction class

A datastore transaction.

It can be used for making lookups/queries and queue modifications (inserts/updates/deletes). Finally the transaction can be either committed or rolled back.

Constructors

Transaction(DatastoreDB db, Transaction _datastoreTransaction)

Properties

db → DatastoreDB
final
hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

commit() → Future
Commits this transaction including all of the queued mutations.
lookup<T extends Model>(List<Key> keys) → Future<List<T?>>
Looks up keys within this transaction.
lookupOrNull<T extends Model>(Key key) → Future<T?>
Looks up a single key in the datastore, and returns the associated Model object.
lookupValue<T extends Model>(Key key, {T orElse()?}) → Future<T>
Looks up a single key within this transaction, and returns the associated Model object.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
query<T extends Model>(Key ancestorKey, {Partition? partition}) → Query<T>
Query for kind models with ancestorKey.
queueMutations({List<Model>? inserts, List<Key>? deletes}) → void
Enqueues inserts and deletes which should be committed at commit time.
rollback() → Future
Rolls this transaction back.
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited