# Coded

    @propertyWrapper
    public struct Coded<V> : AttributeKeyPathStringConvertible, FieldAttributeProtocol

The containing type for stored property values. Any type supported by the specified encoder/decoder are allowed.

    class Animal: CoreStoreObject {

        @Field.Coded("eyeColor", coder: FieldCoders.NSCoding.self)
        var eyeColor: UIColor = .black

        @Field.Coded(
            "bloodType",
            coder: {
                encode: { $0.toData() },
                decode: { BloodType(fromData: $0) }
            }
        )
        var bloodType: BloodType = .unknown
    }

Important

`Field` properties are required to be used as `@propertyWrapper`s. Any other declaration not using the `@Field.Stored(...) var` syntax will be ignored.

- `init(wrappedValue:_:versionHashModifier:previousVersionKeyPath:coder:customGetter:customSetter:affectedByKeyPaths:)`

  Initializes the metadata for the property.

      class Person: CoreStoreObject {

          @Field.Coded("eyeColor", coder: FieldCoders.NSCoding.self)
          var eyeColor: UIColor = .black
      }

  Important

  Any changes in the `coder` are not reflected in the VersionLock, so make sure that the encoder and decoder logic is compatible for all versions of your persistent store.

  #### Declaration

  Swift

      public init<Coder: FieldCoderType>(
          wrappedValue initial: @autoclosure @escaping () -> V,
          _ keyPath: KeyPathString = { fatalError("'keyPath' argument required (SR-13069 workaround)") }(),
          versionHashModifier: @autoclosure @escaping () -> String? = nil,
          previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
          coder fieldCoderType: Coder.Type = { fatalError("'coder' argument required (SR-13069 workaround)") }(),
          customGetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>) -> V)? = nil,
          customSetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>, _ newValue: V) -> Void)? = nil,
          affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
      ) where Coder.FieldStoredValue == V

  #### Parameters

  `initial` | the initial value for the property that is shared for all instances of this object. Note that this is evaluated during `DataStack` setup, not during object creation. To assign a value during object creation, use the `dynamicInitialValue` argument instead.
  `keyPath` | the permanent attribute name for this property.
  `versionHashModifier` | used to mark or denote a property 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.)
  `previousVersionKeyPath` | used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property’s `keyPath` with a matching destination entity property’s `previousVersionKeyPath` 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 `keyPath`.
  `coder` | The `FieldCoderType` to be used for encoding and decoding the value
  `customGetter` | use this closure as an “override” for the default property getter. The closure receives a `ObjectProxy<O>`, which acts as a type-safe proxy for the receiver. When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively. Do not make assumptions on the thread/queue that the closure is executed on; accessors may be called from `NSError` logs for example.
  `customSetter` | use this closure as an “override” for the default property setter. The closure receives a `ObjectProxy<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties’ static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively.
  `affectedByKeyPaths` | a set of key paths for properties whose values affect the value of the receiver. This is similar to `NSManagedObject.keyPathsForValuesAffectingValue(forKey:)`.

- `init(_:versionHashModifier:previousVersionKeyPath:coder:customGetter:customSetter:affectedByKeyPaths:dynamicInitialValue:)`

  Initializes the metadata for the property.

      class Person: CoreStoreObject {

          @Field.Coded("eyeColor", coder: FieldCoders.NSCoding.self, dynamicInitialValue: { UIColor.random() })
          var eyeColor: UIColor
      }

  Important

  Any changes in the `coder` are not reflected in the VersionLock, so make sure that the encoder and decoder logic is compatible for all versions of your persistent store.

  #### Declaration

  Swift

      public init<Coder: FieldCoderType>(
          _ keyPath: KeyPathString,
          versionHashModifier: @autoclosure @escaping () -> String? = nil,
          previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
          coder fieldCoderType: Coder.Type,
          customGetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>) -> V)? = nil,
          customSetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>, _ newValue: V) -> Void)? = nil,
          affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = [],
          dynamicInitialValue: @escaping () -> V
      ) where Coder.FieldStoredValue == V

  #### Parameters

  `keyPath` | the permanent attribute name for this property.
  `versionHashModifier` | used to mark or denote a property 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.)
  `previousVersionKeyPath` | used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property’s `keyPath` with a matching destination entity property’s `previousVersionKeyPath` 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 `keyPath`.
  `coder` | The `FieldCoderType` to be used for encoding and decoding the value
  `customGetter` | use this closure as an “override” for the default property getter. The closure receives a `ObjectProxy<O>`, which acts as a type-safe proxy for the receiver. When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively. Do not make assumptions on the thread/queue that the closure is executed on; accessors may be called from `NSError` logs for example.
  `customSetter` | use this closure as an “override” for the default property setter. The closure receives a `ObjectProxy<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties’ static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively.
  `affectedByKeyPaths` | a set of key paths for properties whose values affect the value of the receiver. This is similar to `NSManagedObject.keyPathsForValuesAffectingValue(forKey:)`.
  `dynamicInitialValue` | the initial value for the property when the object is first created.

- `init(wrappedValue:_:versionHashModifier:previousVersionKeyPath:coder:customGetter:customSetter:affectedByKeyPaths:)`

  Initializes the metadata for the property.

      class Person: CoreStoreObject {

          @Field.Coded(
              "bloodType",
              coder: {
                  encode: { $0.toData() },
                  decode: { BloodType(fromData: $0) }
              }
          )
          var bloodType: BloodType = .unknown
      }

  Important

  Any changes in the encoder/decoder are not reflected in the VersionLock, so make sure that the encoder and decoder logic is compatible for all versions of your persistent store.

  #### Declaration

  Swift

      public init(
          wrappedValue initial: @autoclosure @escaping () -> V,
          _ keyPath: KeyPathString = { fatalError("'keyPath' argument required (SR-13069 workaround)") }(),
          versionHashModifier: @autoclosure @escaping () -> String? = nil,
          previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
          coder: (encode: (V) -> Data?, decode: (Data?) -> V) = { fatalError("'coder' argument required (SR-13069 workaround)") }(),
          customGetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>) -> V)? = nil,
          customSetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>, _ newValue: V) -> Void)? = nil,
          affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
      )

  #### Parameters

  `initial` | the initial value for the property that is shared for all instances of this object. Note that this is evaluated during `DataStack` setup, not during object creation. To assign a value during object creation, use the `dynamicInitialValue` argument instead.
  `keyPath` | the permanent attribute name for this property.
  `versionHashModifier` | used to mark or denote a property 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.)
  `previousVersionKeyPath` | used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property’s `keyPath` with a matching destination entity property’s `previousVersionKeyPath` 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 `keyPath`.
  `coder` | The closures to be used for encoding and decoding the value
  `customGetter` | use this closure as an “override” for the default property getter. The closure receives a `ObjectProxy<O>`, which acts as a type-safe proxy for the receiver. When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively. Do not make assumptions on the thread/queue that the closure is executed on; accessors may be called from `NSError` logs for example.
  `customSetter` | use this closure as an “override” for the default property setter. The closure receives a `ObjectProxy<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties’ static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively.
  `affectedByKeyPaths` | a set of key paths for properties whose values affect the value of the receiver. This is similar to `NSManagedObject.keyPathsForValuesAffectingValue(forKey:)`.

- `init(_:versionHashModifier:previousVersionKeyPath:coder:customGetter:customSetter:affectedByKeyPaths:dynamicInitialValue:)`

  Initializes the metadata for the property.

      class Person: CoreStoreObject {

          @Field.Coded(
              "bloodType",
              coder: {
                  encode: { $0.toData() },
                  decode: { BloodType(fromData: $0) }
              },
              dynamicInitialValue: { BloodType.random() }
          )
          var bloodType: BloodType
      }

  Important

  Any changes in the encoder/decoder are not reflected in the VersionLock, so make sure that the encoder and decoder logic is compatible for all versions of your persistent store.

  #### Declaration

  Swift

      public init(
          _ keyPath: KeyPathString,
          versionHashModifier: @autoclosure @escaping () -> String? = nil,
          previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
          coder: (encode: (V) -> Data?, decode: (Data?) -> V),
          customGetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>) -> V)? = nil,
          customSetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>, _ newValue: V) -> Void)? = nil,
          affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = [],
          dynamicInitialValue: @escaping () -> V
      )

  #### Parameters

  `keyPath` | the permanent attribute name for this property.
  `versionHashModifier` | used to mark or denote a property 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.)
  `previousVersionKeyPath` | used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property’s `keyPath` with a matching destination entity property’s `previousVersionKeyPath` 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 `keyPath`.
  `coder` | The closures to be used for encoding and decoding the value
  `customGetter` | use this closure as an “override” for the default property getter. The closure receives a `ObjectProxy<O>`, which acts as a type-safe proxy for the receiver. When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively. Do not make assumptions on the thread/queue that the closure is executed on; accessors may be called from `NSError` logs for example.
  `customSetter` | use this closure as an “override” for the default property setter. The closure receives a `ObjectProxy<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties’ static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively.
  `affectedByKeyPaths` | a set of key paths for properties whose values affect the value of the receiver. This is similar to `NSManagedObject.keyPathsForValuesAffectingValue(forKey:)`.
  `dynamicInitialValue` | the initial value for the property when the object is first created.

### AnyKeyPathStringConvertible

- `cs_keyPathString`

  #### Declaration

  Swift

      public var cs_keyPathString: String { get }

### KeyPathStringConvertible

- `ObjectType`

  #### Declaration

  Swift

      public typealias ObjectType = O

- `DestinationValueType`

  #### Declaration

  Swift

      public typealias DestinationValueType = V

### AttributeKeyPathStringConvertible

- `ReturnValueType`

  #### Declaration

  Swift

      public typealias ReturnValueType = DestinationValueType

### Available where `V`: `FieldOptionalType`

- `init(wrappedValue:_:versionHashModifier:previousVersionKeyPath:coder:customGetter:customSetter:affectedByKeyPaths:)`

  Initializes the metadata for the property.

      class Person: CoreStoreObject {

          @Field.Coded("eyeColor", coder: FieldCoders.NSCoding.self)
          var eyeColor: UIColor? = nil
      }

  Important

  Any changes in the `coder` are not reflected in the VersionLock, so make sure that the encoder and decoder logic is compatible for all versions of your persistent store.

  #### Declaration

  Swift

      public init<Coder: FieldCoderType>(
          wrappedValue initial: @autoclosure @escaping () -> V = nil,
          _ keyPath: KeyPathString = { fatalError("'keyPath' argument required (SR-13069 workaround)") }(),
          versionHashModifier: @autoclosure @escaping () -> String? = nil,
          previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
          coder: Coder.Type = { fatalError("'coder' argument required (SR-13069 workaround)") }(),
          customGetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>) -> V)? = nil,
          customSetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>, _ newValue: V) -> Void)? = nil,
          affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
      ) where Coder.FieldStoredValue == V.Wrapped

  #### Parameters

  `initial` | the initial value for the property that is shared for all instances of this object. Note that this is evaluated during `DataStack` setup, not during object creation. To assign a value during object creation, use the `dynamicInitialValue` argument instead.
  `keyPath` | the permanent attribute name for this property.
  `versionHashModifier` | used to mark or denote a property 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.)
  `previousVersionKeyPath` | used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property’s `keyPath` with a matching destination entity property’s `previousVersionKeyPath` 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 `keyPath`.
  `coder` | The `FieldCoderType` to be used for encoding and decoding the value
  `customGetter` | use this closure as an “override” for the default property getter. The closure receives a `ObjectProxy<O>`, which acts as a type-safe proxy for the receiver. When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively. Do not make assumptions on the thread/queue that the closure is executed on; accessors may be called from `NSError` logs for example.
  `customSetter` | use this closure as an “override” for the default property setter. The closure receives a `ObjectProxy<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties’ static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively.
  `affectedByKeyPaths` | a set of key paths for properties whose values affect the value of the receiver. This is similar to `NSManagedObject.keyPathsForValuesAffectingValue(forKey:)`.

- `init(_:versionHashModifier:previousVersionKeyPath:coder:customGetter:customSetter:affectedByKeyPaths:dynamicInitialValue:)`

  Initializes the metadata for the property.

      class Person: CoreStoreObject {

          @Field.Coded("eyeColor", coder: FieldCoders.NSCoding.self, dynamicInitialValue: { UIColor.random() })
          var eyeColor: UIColor?
      }

  Important

  Any changes in the `coder` are not reflected in the VersionLock, so make sure that the encoder and decoder logic is compatible for all versions of your persistent store.

  #### Declaration

  Swift

      public init<Coder: FieldCoderType>(
          _ keyPath: KeyPathString,
          versionHashModifier: @autoclosure @escaping () -> String? = nil,
          previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
          coder: Coder.Type,
          customGetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>) -> V)? = nil,
          customSetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>, _ newValue: V) -> Void)? = nil,
          affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = [],
          dynamicInitialValue: @escaping () -> V
      ) where Coder.FieldStoredValue == V.Wrapped

  #### Parameters

  `keyPath` | the permanent attribute name for this property.
  `versionHashModifier` | used to mark or denote a property 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.)
  `previousVersionKeyPath` | used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property’s `keyPath` with a matching destination entity property’s `previousVersionKeyPath` 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 `keyPath`.
  `coder` | The `FieldCoderType` to be used for encoding and decoding the value
  `customGetter` | use this closure as an “override” for the default property getter. The closure receives a `ObjectProxy<O>`, which acts as a type-safe proxy for the receiver. When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively. Do not make assumptions on the thread/queue that the closure is executed on; accessors may be called from `NSError` logs for example.
  `customSetter` | use this closure as an “override” for the default property setter. The closure receives a `ObjectProxy<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties’ static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively.
  `affectedByKeyPaths` | a set of key paths for properties whose values affect the value of the receiver. This is similar to `NSManagedObject.keyPathsForValuesAffectingValue(forKey:)`.
  `dynamicInitialValue` | the initial value for the property when the object is first created.

- `init(wrappedValue:_:versionHashModifier:previousVersionKeyPath:coder:customGetter:customSetter:affectedByKeyPaths:)`

  Initializes the metadata for the property.

      class Person: CoreStoreObject {

          @Field.Coded(
              "bloodType",
              coder: {
                  encode: { $0.toData() },
                  decode: { BloodType(fromData: $0) }
              }
          )
          var bloodType: BloodType?
      }

  Important

  Any changes in the encoder/decoder are not reflected in the VersionLock, so make sure that the encoder and decoder logic is compatible for all versions of your persistent store.

  #### Declaration

  Swift

      public init(
          wrappedValue initial: @autoclosure @escaping () -> V = nil,
          _ keyPath: KeyPathString = { fatalError("'keyPath' argument required (SR-13069 workaround)") }(),
          versionHashModifier: @autoclosure @escaping () -> String? = nil,
          previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
          coder: (encode: (V) -> Data?, decode: (Data?) -> V) = { fatalError("'coder' argument required (SR-13069 workaround)") }(),
          customGetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>) -> V)? = nil,
          customSetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>, _ newValue: V) -> Void)? = nil,
          affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
      )

  #### Parameters

  `initial` | the initial value for the property that is shared for all instances of this object. Note that this is evaluated during `DataStack` setup, not during object creation. To assign a value during object creation, use the `dynamicInitialValue` argument instead.
  `keyPath` | the permanent attribute name for this property.
  `versionHashModifier` | used to mark or denote a property 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.)
  `previousVersionKeyPath` | used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property’s `keyPath` with a matching destination entity property’s `previousVersionKeyPath` 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 `keyPath`.
  `coder` | The closures to be used for encoding and decoding the value
  `customGetter` | use this closure as an “override” for the default property getter. The closure receives a `ObjectProxy<O>`, which acts as a type-safe proxy for the receiver. When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively. Do not make assumptions on the thread/queue that the closure is executed on; accessors may be called from `NSError` logs for example.
  `customSetter` | use this closure as an “override” for the default property setter. The closure receives a `ObjectProxy<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties’ static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively.
  `affectedByKeyPaths` | a set of key paths for properties whose values affect the value of the receiver. This is similar to `NSManagedObject.keyPathsForValuesAffectingValue(forKey:)`.

- `init(_:versionHashModifier:previousVersionKeyPath:coder:customGetter:customSetter:affectedByKeyPaths:dynamicInitialValue:)`

  Initializes the metadata for the property.

      class Person: CoreStoreObject {

          @Field.Coded(
              "bloodType",
              coder: {
                  encode: { $0.toData() },
                  decode: { BloodType(fromData: $0) }
              },
              dynamicInitialValue: { BloodType.random() }
          )
          var bloodType: BloodType?
      }

  Important

  Any changes in the encoder/decoder are not reflected in the VersionLock, so make sure that the encoder and decoder logic is compatible for all versions of your persistent store.

  #### Declaration

  Swift

      public init(
          _ keyPath: KeyPathString,
          versionHashModifier: @autoclosure @escaping () -> String? = nil,
          previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
          coder: (encode: (V) -> Data?, decode: (Data?) -> V),
          customGetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>) -> V)? = nil,
          customSetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>, _ newValue: V) -> Void)? = nil,
          affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = [],
          dynamicInitialValue: @escaping () -> V
      )

  #### Parameters

  `keyPath` | the permanent attribute name for this property.
  `versionHashModifier` | used to mark or denote a property 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.)
  `previousVersionKeyPath` | used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property’s `keyPath` with a matching destination entity property’s `previousVersionKeyPath` 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 `keyPath`.
  `coder` | The closures to be used for encoding and decoding the value
  `customGetter` | use this closure as an “override” for the default property getter. The closure receives a `ObjectProxy<O>`, which acts as a type-safe proxy for the receiver. When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively. Do not make assumptions on the thread/queue that the closure is executed on; accessors may be called from `NSError` logs for example.
  `customSetter` | use this closure as an “override” for the default property setter. The closure receives a `ObjectProxy<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties’ static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively.
  `affectedByKeyPaths` | a set of key paths for properties whose values affect the value of the receiver. This is similar to `NSManagedObject.keyPathsForValuesAffectingValue(forKey:)`.
  `dynamicInitialValue` | the initial value for the property when the object is first created.

### Available where `V`: `DefaultNSSecureCodable`

- `init(wrappedValue:_:versionHashModifier:previousVersionKeyPath:customGetter:customSetter:affectedByKeyPaths:)`

  Initializes the metadata for the property. This overload is for types supported by Core Data’s default NSSecureCodable implementation: `NSArray`, `NSDictionary`, `NSSet`, `NSString`, `NSNumber`, `NSDate`, `NSData`, `NSURL`, `NSUUID`, and `NSNull`.

      class Person: CoreStoreObject {

          @Field.Coded("customInfo")
          var customInfo: NSDictionary = [:]
      }

  #### Declaration

  Swift

      public init(
          wrappedValue initial: @autoclosure @escaping () -> V,
          _ keyPath: KeyPathString = { fatalError("'keyPath' argument required (SR-13069 workaround)") }(),
          versionHashModifier: @autoclosure @escaping () -> String? = nil,
          previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
          customGetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>) -> V)? = nil,
          customSetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>, _ newValue: V) -> Void)? = nil,
          affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
      )

  #### Parameters

  `initial` | the initial value for the property that is shared for all instances of this object. Note that this is evaluated during `DataStack` setup, not during object creation. To assign a value during object creation, use the `dynamicInitialValue` argument instead.
  `keyPath` | the permanent attribute name for this property.
  `versionHashModifier` | used to mark or denote a property 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.)
  `previousVersionKeyPath` | used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property’s `keyPath` with a matching destination entity property’s `previousVersionKeyPath` 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 `keyPath`.
  `customGetter` | use this closure as an “override” for the default property getter. The closure receives a `ObjectProxy<O>`, which acts as a type-safe proxy for the receiver. When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively. Do not make assumptions on the thread/queue that the closure is executed on; accessors may be called from `NSError` logs for example.
  `customSetter` | use this closure as an “override” for the default property setter. The closure receives a `ObjectProxy<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties’ static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively.
  `affectedByKeyPaths` | a set of key paths for properties whose values affect the value of the receiver. This is similar to `NSManagedObject.keyPathsForValuesAffectingValue(forKey:)`.

- `init(_:versionHashModifier:previousVersionKeyPath:customGetter:customSetter:affectedByKeyPaths:dynamicInitialValue:)`

  Initializes the metadata for the property. This overload is for types supported by Core Data’s default NSSecureCodable implementation: `NSArray`, `NSDictionary`, `NSSet`, `NSString`, `NSNumber`, `NSDate`, `NSData`, `NSURL`, `NSUUID`, and `NSNull`.

      class Person: CoreStoreObject {

          @Field.Coded("customInfo", dynamicInitialValue: { ["id": UUID()] })
          var customInfo: NSDictionary
      }

  #### Declaration

  Swift

      public init(
          _ keyPath: KeyPathString,
          versionHashModifier: @autoclosure @escaping () -> String? = nil,
          previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
          customGetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>) -> V)? = nil,
          customSetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>, _ newValue: V) -> Void)? = nil,
          affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = [],
          dynamicInitialValue: @escaping () -> V
      )

  #### Parameters

  `keyPath` | the permanent attribute name for this property.
  `versionHashModifier` | used to mark or denote a property 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.)
  `previousVersionKeyPath` | used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property’s `keyPath` with a matching destination entity property’s `previousVersionKeyPath` 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 `keyPath`.
  `customGetter` | use this closure as an “override” for the default property getter. The closure receives a `ObjectProxy<O>`, which acts as a type-safe proxy for the receiver. When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively. Do not make assumptions on the thread/queue that the closure is executed on; accessors may be called from `NSError` logs for example.
  `customSetter` | use this closure as an “override” for the default property setter. The closure receives a `ObjectProxy<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties’ static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively.
  `affectedByKeyPaths` | a set of key paths for properties whose values affect the value of the receiver. This is similar to `NSManagedObject.keyPathsForValuesAffectingValue(forKey:)`.
  `dynamicInitialValue` | the initial value for the property when the object is first created.

### Available where `V`: `FieldOptionalType`, `V.Wrapped`: `DefaultNSSecureCodable`

- `init(wrappedValue:_:versionHashModifier:previousVersionKeyPath:customGetter:customSetter:affectedByKeyPaths:)`

  Initializes the metadata for the property. This overload is for types supported by Core Data’s default NSSecureCodable implementation: `NSArray`, `NSDictionary`, `NSSet`, `NSString`, `NSNumber`, `NSDate`, `NSData`, `NSURL`, `NSUUID`, and `NSNull`.

      class Person: CoreStoreObject {

          @Field.Coded("customInfo")
          var customInfo: NSDictionary? = nil
      }

  #### Declaration

  Swift

      public init(
          wrappedValue initial: @autoclosure @escaping () -> V = nil,
          _ keyPath: KeyPathString = { fatalError("'keyPath' argument required (SR-13069 workaround)") }(),
          versionHashModifier: @autoclosure @escaping () -> String? = nil,
          previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
          customGetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>) -> V)? = nil,
          customSetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>, _ newValue: V) -> Void)? = nil,
          affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
      )

  #### Parameters

  `initial` | the initial value for the property that is shared for all instances of this object. Note that this is evaluated during `DataStack` setup, not during object creation. To assign a value during object creation, use the `dynamicInitialValue` argument instead.
  `keyPath` | the permanent attribute name for this property.
  `versionHashModifier` | used to mark or denote a property 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.)
  `previousVersionKeyPath` | used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property’s `keyPath` with a matching destination entity property’s `previousVersionKeyPath` 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 `keyPath`.
  `customGetter` | use this closure as an “override” for the default property getter. The closure receives a `ObjectProxy<O>`, which acts as a type-safe proxy for the receiver. When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively. Do not make assumptions on the thread/queue that the closure is executed on; accessors may be called from `NSError` logs for example.
  `customSetter` | use this closure as an “override” for the default property setter. The closure receives a `ObjectProxy<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties’ static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively.
  `affectedByKeyPaths` | a set of key paths for properties whose values affect the value of the receiver. This is similar to `NSManagedObject.keyPathsForValuesAffectingValue(forKey:)`.

- `init(_:versionHashModifier:previousVersionKeyPath:customGetter:customSetter:affectedByKeyPaths:dynamicInitialValue:)`

  Initializes the metadata for the property. This overload is for types supported by Core Data’s default NSSecureCodable implementation: `NSArray`, `NSDictionary`, `NSSet`, `NSString`, `NSNumber`, `NSDate`, `NSData`, `NSURL`, `NSUUID`, and `NSNull`.

      class Person: CoreStoreObject {

          @Field.Coded("customInfo", dynamicInitialValue: { ["id": UUID()] })
          var customInfo: NSDictionary?
      }

  #### Declaration

  Swift

      public init(
          _ keyPath: KeyPathString,
          versionHashModifier: @autoclosure @escaping () -> String? = nil,
          previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
          customGetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>) -> V)? = nil,
          customSetter: ((_ object: ObjectProxy<O>, _ field: ObjectProxy<O>.FieldProxy<V>, _ newValue: V) -> Void)? = nil,
          affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = [],
          dynamicInitialValue: @escaping () -> V
      )

  #### Parameters

  `keyPath` | the permanent attribute name for this property.
  `versionHashModifier` | used to mark or denote a property 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.)
  `previousVersionKeyPath` | used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property’s `keyPath` with a matching destination entity property’s `previousVersionKeyPath` 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 `keyPath`.
  `customGetter` | use this closure as an “override” for the default property getter. The closure receives a `ObjectProxy<O>`, which acts as a type-safe proxy for the receiver. When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively. Do not make assumptions on the thread/queue that the closure is executed on; accessors may be called from `NSError` logs for example.
  `customSetter` | use this closure as an “override” for the default property setter. The closure receives a `ObjectProxy<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties’ static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `ObjectProxy<O>`, make sure to use `field.primitiveValue` instead of `field.value`, which would unintentionally execute the same closure again recursively.
  `affectedByKeyPaths` | a set of key paths for properties whose values affect the value of the receiver. This is similar to `NSManagedObject.keyPathsForValuesAffectingValue(forKey:)`.
  `dynamicInitialValue` | the initial value for the property when the object is first created.