HasOneThrough<R extends Model> class final

hasOneThrough: like HasManyThrough but a single model (or null).

Inheritance

• Object
• Relation<R>
• HasManyThrough<R>
• HasOneThrough

Constructors

HasOneThrough(ModelDefinition<R> related(), {required ModelDefinition<Model> through(), required String firstKey, required String secondKey, String localKey = 'id', String secondLocalKey = 'id'})

Properties

firstKey → String

final, inherited

hashCode → int

The hash code for this object.

no setter, inherited

localKey → String

final, inherited

matchColumns → List<String>

The related rows' columns this relation matches them on (its foreign or owner key): added back when an eager load selects columns without them (with_('user:name') still reads users.id).

no setter, inherited

name ↔ String

Name under which the relation is registered (set by the definition).

getter/setter pair, inherited

parentColumns → List<String>

The parent rows' columns this relation reads (its local or foreign key): added to a parent query that selects columns without them, so the relation can still be loaded from its rows.

no setter, inherited

related → ModelDefinition<R>

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

secondKey → String

final, inherited

secondLocalKey → String

final, inherited

through → ModelDefinition<Model> Function()

final, inherited

Methods

correlated(ModelDefinition<Model> parent, DatabaseManager db) → ModelQuery<R>

A query on the related table correlated with the parent table, for whereHas / withCount.

inherited

eagerLoad(List<Model> parents, DatabaseManager db, [RelationConstraint? constraint]) → Future<void>

Loads the relation for many parents in one batched query and stores the result on each parent under name.

override

existenceQuery(ModelDefinition<Model> parent, DatabaseManager db, {required String parentTable}) → ModelQuery<R>

correlated against the parent table as parentTable names it (an alias inside a self-relation subquery). The built-in relations alias their own table when it has the parent's name (categories whose children are categories); custom relations fall back to correlated.

inherited

loadedModels(List<Model> parents) → List<Model>

The models loaded under name on parents, flattened (for nested eager loading).

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

queryFor(Model parent, DatabaseManager db) → ModelQuery<R>

Query returning the related models of one parent.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited