DataMigration class abstract

Interface for migrating data from fromVersion to toVersion.

class CounterV1DataMigration extends DataMigration {
  @override
  int get fromVersion => 1;

  @override
  int get toVersion => 2;

  @override
  Future<dynamic> migrate(dynamic data) async {
    return '{count: $data}';
  }
}

Constructors

DataMigration.new()

Properties

fromVersion → int
The version of the data to be migrated.
no setter
hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
toVersion → int
The version of the data once the migration has been completed.
no setter

Methods

migrate(dynamic data) → Future
apply migration from fromVersion to toVersion
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

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