The base class for migration instructions.
For each set of changes to a database, a subclass of Migration is created. Subclasses will override upgrade to make changes to the Schema which are translated into database operations to update a database's schema.
Constructors
Properties
- currentSchema → Schema
-
The current state of the
Schema
.read-only - database → SchemaBuilder
-
Receiver for database altering operations.
read / write - store → PersistentStore
-
The
PersistentStore
that represents the database being migrated.read-only - hashCode → int
-
The hash code for this object.
read-only, inherited - runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
Operators
-
operator ==(
other) → bool -
The equality operator.
inherited
Methods
-
downgrade(
) → Future -
Method invoked to downgrade a database from this migration version.
-
seed(
) → Future -
Method invoked to seed a database's data after this migration version is upgraded to.
-
upgrade(
) → Future -
Method invoked to upgrade a database to this migration version.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed.
inherited -
toString(
) → String -
Returns a string representation of this object.
inherited