Datastore class abstract
Interface used to talk to the Google Cloud Datastore service.
It can be used to insert/update/delete Entitys, lookup/query Entitys and allocate IDs from the auto ID allocation policy.
Constructors
- Datastore(Client client, String project)
-
Access Datastore using an authenticated client.
factory
- Datastore.withRetry(Datastore delegate, {int? maxAttempts})
-
Retry Datastore operations where the issue seems to be transient.
factory
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
allocateIds(
List< Key> keys) → Future<List< Key> > -
Allocate integer IDs for the partially populated
keysgiven as argument. -
beginTransaction(
{bool crossEntityGroup = false}) → Future< Transaction> - Starts a new transaction and returns an opaque value representing it.
-
commit(
{List< Entity> inserts, List<Entity> autoIdInserts, List<Key> deletes, Transaction transaction}) → Future<CommitResult> - Make modifications to the datastore.
-
lookup(
List< Key> keys, {Transaction transaction}) → Future<List< Entity?> > -
Looks up the fully populated
keysin the datastore and returns either the Entity corresponding to the Key ornull. The order in the returned Entitys is the same as inkeys. -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
query(
Query query, {Partition partition, Transaction transaction}) → Future< Page< Entity> > -
Runs a query on the dataset and returns a
Pageof matching Entitys. -
rollback(
Transaction transaction) → Future - Roll a started transaction back.
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited