Migration class abstract

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

Migration()

Properties

currentSchema → Schema?

The current state of the Schema.

no setter

database ↔ SchemaBuilder

Receiver for database altering operations.

getter/setter pair

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

store → PersistentStore?

The PersistentStore that represents the database being migrated.

no setter

version ↔ int?

getter/setter pair

Methods

downgrade() → Future

Method invoked to downgrade a database from this migration version.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

seed() → Future

Method invoked to seed a database's data after this migration version is upgraded to.

toString() → String

A string representation of this object.

inherited

upgrade() → Future

Method invoked to upgrade a database to this migration version.

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

sourceForSchemaUpgrade(Schema existingSchema, Schema newSchema, int? version, {List<String>? changeList}) → String