ToManyOrdered
public final class ToManyOrdered<D> : ToManyRelationshipKeyPathStringConvertible, RelationshipProtocol where D : CoreStoreObject
extension RelationshipContainer.ToManyOrdered: RandomAccessCollection
The containing type for to-many ordered relationships. Any CoreStoreObject
subclass can be a destination type. Inverse relationships should be declared from the destination type as well, using the inverse:
argument for the relationship.
class Dog: CoreStoreObject {
let master = Relationship.ToOne<Person>("master")
}
class Person: CoreStoreObject {
let pets = Relationship.ToManyOrdered<Dog>("pets", inverse: { $0.master })
}
Important
Relationship.ToManyOrdered
properties are required to be stored properties. Computed properties will be ignored, including lazy
and weak
properties.
-
Initializes the metadata for the relationship. All relationships require an “inverse”, so updates to to this object’s relationship are also reflected on its destination object. Make sure to declare this relationship’s inverse relationship on its destination object. Due to Swift’s compiler limitation, only one of the relationship and its inverse can declare an
inverse:
argument.class Dog: CoreStoreObject { let master = Relationship.ToOne<Person>("master") } class Person: CoreStoreObject { let pets = Relationship.ToManyOrdered<Dog>("pets", inverse: { $0.master }) }
Declaration
Swift
public convenience init( _ keyPath: KeyPathString, minCount: Int = 0, maxCount: Int = 0, deleteRule: DeleteRule = .nullify, versionHashModifier: @autoclosure @escaping () -> String? = nil, renamingIdentifier: @autoclosure @escaping () -> String? = nil, affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = [])
Parameters
keyPath
the permanent name for this relationship.
minCount
the minimum number of objects in this relationship UNLESS THE RELATIONSHIP IS EMPTY. This means there might be zero objects in the relationship, which might be less than
minCount
. If the number of objects in the relationship do not satisfyminCount
andmaxCount
, the transaction’s commit (or auto-commit) would fail with a validation error.maxCount
the maximum number of objects in this relationship. If the number of objects in the relationship do not satisfy
minCount
andmaxCount
, the transaction’s commit (or auto-commit) would fail with a validation error.deleteRule
defines what happens to relationship when an object is deleted. Valid values are
.nullify
,.cascade
, and.delete
. Defaults to.nullify
.versionHashModifier
used to mark or denote a relationship as being a different “version” than another even if all of the values which affect persistence are equal. (Such a difference is important in cases where the properties are unchanged but the format or content of its data are changed.)
renamingIdentifier
used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property and a destination entity property that share the same identifier indicate that a property mapping should be configured to migrate from the source to the destination. If unset, the identifier will be the property’s name.
affectedByKeyPaths
a set of key paths for properties whose values affect the value of the receiver. This is similar to
NSManagedObject.keyPathsForValuesAffectingValue(forKey:)
. -
init(_:
minCount: maxCount: inverse: deleteRule: versionHashModifier: renamingIdentifier: affectedByKeyPaths: ) Initializes the metadata for the relationship. All relationships require an “inverse”, so updates to to this object’s relationship are also reflected on its destination object. Make sure to declare this relationship’s inverse relationship on its destination object. Due to Swift’s compiler limitation, only one of the relationship and its inverse can declare an
inverse:
argument.class Dog: CoreStoreObject { let master = Relationship.ToOne<Person>("master") } class Person: CoreStoreObject { let pets = Relationship.ToManyOrdered<Dog>("pets", inverse: { $0.master }) }
Declaration
Swift
public convenience init( _ keyPath: KeyPathString, minCount: Int = 0, maxCount: Int = 0, inverse: @escaping (D) -> RelationshipContainer<D>.ToOne<O>, deleteRule: DeleteRule = .nullify, versionHashModifier: @autoclosure @escaping () -> String? = nil, renamingIdentifier: @autoclosure @escaping () -> String? = nil, affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = [])
Parameters
keyPath
the permanent name for this relationship.
minCount
the minimum number of objects in this relationship UNLESS THE RELATIONSHIP IS EMPTY. This means there might be zero objects in the relationship, which might be less than
minCount
. If the number of objects in the relationship do not satisfyminCount
andmaxCount
, the transaction’s commit (or auto-commit) would fail with a validation error.maxCount
the maximum number of objects in this relationship. If the number of objects in the relationship do not satisfy
minCount
andmaxCount
, the transaction’s commit (or auto-commit) would fail with a validation error.inverse
the inverse relationship that is declared for the destination object. All relationships require an “inverse”, so updates to to this object’s relationship are also reflected on its destination object.
deleteRule
defines what happens to relationship when an object is deleted. Valid values are
.nullify
,.cascade
, and.delete
. Defaults to.nullify
.versionHashModifier
used to mark or denote a relationship as being a different “version” than another even if all of the values which affect persistence are equal. (Such a difference is important in cases where the properties are unchanged but the format or content of its data are changed.)
renamingIdentifier
used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property and a destination entity property that share the same identifier indicate that a property mapping should be configured to migrate from the source to the destination. If unset, the identifier will be the property’s name.
affectedByKeyPaths
a set of key paths for properties whose values affect the value of the receiver. This is similar to
NSManagedObject.keyPathsForValuesAffectingValue(forKey:)
. -
init(_:
minCount: maxCount: inverse: deleteRule: versionHashModifier: renamingIdentifier: affectedByKeyPaths: ) Initializes the metadata for the relationship. All relationships require an “inverse”, so updates to to this object’s relationship are also reflected on its destination object. Make sure to declare this relationship’s inverse relationship on its destination object. Due to Swift’s compiler limitation, only one of the relationship and its inverse can declare an
inverse:
argument.class Dog: CoreStoreObject { let master = Relationship.ToOne<Person>("master") } class Person: CoreStoreObject { let pets = Relationship.ToManyOrdered<Dog>("pets", inverse: { $0.master }) }
Declaration
Swift
public convenience init( _ keyPath: KeyPathString, minCount: Int = 0, maxCount: Int = 0, inverse: @escaping (D) -> RelationshipContainer<D>.ToManyOrdered<O>, deleteRule: DeleteRule = .nullify, versionHashModifier: @autoclosure @escaping () -> String? = nil, renamingIdentifier: @autoclosure @escaping () -> String? = nil, affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = [])
Parameters
keyPath
the permanent name for this relationship.
minCount
the minimum number of objects in this relationship UNLESS THE RELATIONSHIP IS EMPTY. This means there might be zero objects in the relationship, which might be less than
minCount
. If the number of objects in the relationship do not satisfyminCount
andmaxCount
, the transaction’s commit (or auto-commit) would fail with a validation error.maxCount
the maximum number of objects in this relationship. If the number of objects in the relationship do not satisfy
minCount
andmaxCount
, the transaction’s commit (or auto-commit) would fail with a validation error.inverse
the inverse relationship that is declared for the destination object. All relationships require an “inverse”, so updates to to this object’s relationship are also reflected on its destination object.
deleteRule
defines what happens to relationship when an object is deleted. Valid values are
.nullify
,.cascade
, and.delete
. Defaults to.nullify
.versionHashModifier
used to mark or denote a relationship as being a different “version” than another even if all of the values which affect persistence are equal. (Such a difference is important in cases where the properties are unchanged but the format or content of its data are changed.)
renamingIdentifier
used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property and a destination entity property that share the same identifier indicate that a property mapping should be configured to migrate from the source to the destination. If unset, the identifier will be the property’s name.
affectedByKeyPaths
a set of key paths for properties whose values affect the value of the receiver. This is similar to
NSManagedObject.keyPathsForValuesAffectingValue(forKey:)
. -
init(_:
minCount: maxCount: inverse: deleteRule: versionHashModifier: renamingIdentifier: affectedByKeyPaths: ) Initializes the metadata for the relationship. All relationships require an “inverse”, so updates to to this object’s relationship are also reflected on its destination object. Make sure to declare this relationship’s inverse relationship on its destination object. Due to Swift’s compiler limitation, only one of the relationship and its inverse can declare an
inverse:
argument.class Dog: CoreStoreObject { let master = Relationship.ToOne<Person>("master") } class Person: CoreStoreObject { let pets = Relationship.ToManyOrdered<Dog>("pets", inverse: { $0.master }) }
Declaration
Swift
public convenience init( _ keyPath: KeyPathString, minCount: Int = 0, maxCount: Int = 0, inverse: @escaping (D) -> RelationshipContainer<D>.ToManyUnordered<O>, deleteRule: DeleteRule = .nullify, versionHashModifier: @autoclosure @escaping () -> String? = nil, renamingIdentifier: @autoclosure @escaping () -> String? = nil, affectedByKeyPaths: @autoclosure @escaping () -> Set<String> = [])
Parameters
keyPath
the permanent name for this relationship.
minCount
the minimum number of objects in this relationship UNLESS THE RELATIONSHIP IS EMPTY. This means there might be zero objects in the relationship, which might be less than
minCount
. If the number of objects in the relationship do not satisfyminCount
andmaxCount
, the transaction’s commit (or auto-commit) would fail with a validation error.maxCount
the maximum number of objects in this relationship. If the number of objects in the relationship do not satisfy
minCount
andmaxCount
, the transaction’s commit (or auto-commit) would fail with a validation error.inverse
the inverse relationship that is declared for the destination object. All relationships require an “inverse”, so updates to to this object’s relationship are also reflected on its destination object.
deleteRule
defines what happens to relationship when an object is deleted. Valid values are
.nullify
,.cascade
, and.delete
. Defaults to.nullify
.versionHashModifier
used to mark or denote a relationship as being a different “version” than another even if all of the values which affect persistence are equal. (Such a difference is important in cases where the properties are unchanged but the format or content of its data are changed.)
renamingIdentifier
used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property and a destination entity property that share the same identifier indicate that a property mapping should be configured to migrate from the source to the destination. If unset, the identifier will be the property’s name.
affectedByKeyPaths
a set of key paths for properties whose values affect the value of the receiver. This is similar to
NSManagedObject.keyPathsForValuesAffectingValue(forKey:)
. -
The relationship value
Declaration
Swift
public var value: ReturnValueType { get set }
-
Declaration
Swift
public var cs_keyPathString: String { get }
-
Declaration
Swift
public typealias ObjectType = O
-
Declaration
Swift
public typealias DestinationValueType = D
-
Declaration
Swift
public typealias ReturnValueType = [DestinationValueType]
-
Observes changes in the receiver value. When the returned
CoreStoreObjectKeyValueObservation
is deinited or invalidated, it will stop observing.Declaration
Swift
public func observe(options: NSKeyValueObservingOptions = [], changeHandler: @escaping (O, CoreStoreObjectOrderedDiff<D>) -> Void) -> CoreStoreObjectKeyValueObservation
Parameters
options
The flags indicating which values to include in the change dictionary.
-
Declaration
Swift
public typealias Iterator = AnyIterator<D>
-
Declaration
Swift
public func makeIterator() -> Iterator
-
Assigns a sequence of objects to the relationship. The operation
person.pets .= [dog, cat]
is equivalent to
person.pets.value = [dog, cat]
Declaration
Swift
public static func .= <S>(relationship: RelationshipContainer<O>.ToManyOrdered<D>, newValue: S) where D == S.Element, S : Sequence
-
Assigns a sequence of objects to the relationship. The operation
person.pets .= anotherPerson.pets
is equivalent to
person.pets.value = anotherPerson.pets.value
Declaration
Swift
public static func .= <O2>(relationship: RelationshipContainer<O>.ToManyOrdered<D>, relationship2: RelationshipContainer<O2>.ToManyOrdered<D>) where O2 : CoreStoreObject
-
Compares equality between a relationship’s objects and a collection of objects
if person.pets .== [dog, cat] { ... }
is equivalent to
if person.pets.value == [dog, cat] { ... }
Declaration
Swift
public static func .== <C>(relationship: RelationshipContainer<O>.ToManyOrdered<D>, collection: C) -> Bool where D == C.Element, C : Collection
-
Compares equality between a collection of objects and a relationship’s objects
if [dog, cat] .== person.pets { ... }
is equivalent to
if [dog, cat] == person.pets.value { ... }
Declaration
Swift
public static func .== <C>(collection: C, relationship: RelationshipContainer<O>.ToManyOrdered<D>) -> Bool where D == C.Element, C : Collection
-
Compares equality between a relationship’s objects and a collection of objects
if person.pets .== anotherPerson.pets { ... }
is equivalent to
if person.pets.value == anotherPerson.pets.value { ... }
Declaration
Swift
public static func .== <O2>(relationship: RelationshipContainer<O>.ToManyOrdered<D>, relationship2: RelationshipContainer<O2>.ToManyOrdered<D>) -> Bool where O2 : CoreStoreObject