DatumRelationSchema class abstract final

A global registry mapping an entity Type to its relation schema.

Populated automatically the first time the engine sees an instance of a relational entity (e.g. on push/read), and/or explicitly via register / registerFromInstance. Once registered, adapters can traverse relations by type alone — no entity instance required (#21):

final debtRels = DatumRelationSchema.of(Debt);           // {lenderGroup: ...}
final groupType = debtRels!['lenderGroup']!.targetType;  // Group
final memberType = DatumRelationSchema.descriptor(groupType, 'members')!.targetType;

Properties

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

Methods

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

Static Properties

registeredTypes → Iterable<Type>

All registered entity types.

no setter

Static Methods

clear() → void

Clears the registry (primarily for tests).

descriptor(Type type, String name) → RelationDescriptor?

The descriptor for relation name on type, or null.

isRegistered(Type type) → bool

Whether a schema is registered for type.

of(Type type) → Map<String, RelationDescriptor>?

The relation schema registered for type, or null if none.

register(Type type, Map<String, RelationDescriptor> schema) → void

Registers schema for type, replacing any existing registration.