RealmSwift也要求Realm也

Question

我正在將一個項目遷移到Swift 3，並遇到了RealmSwift（2.6.1）和Genome（3.2.0）的一些問題。我得到在Xcode是說我需要這些inits的境界錯誤：

required convenience init(realm: RLMRealm, schema: RLMObjectSchema) { 
    self.init(realm: realm, schema: schema) 
} 

required convenience init(value: Any, schema: RLMSchema) { 
    self.init(value: value, schema: schema) 
} 

然而，這需要除進口境界到RealmSwift，當我的類初始化它試圖使用RLMRealm代替領域。警告說'必需的'初始化'init（realm：schema :)'必須由'Object'的子類提供，但是那需要init使用RLMRealm而不是Realm任何建議？

我使用的基因組，以及需要這個初始化，這就是爲什麼境界是要求擺在首位初始化：

required convenience init(node: Node, in context: Context) throws { 
    self.init() 
} 

所以inits看起來像這樣一起：

class BaseModel : RealmSwift.Object, MappableBase, Identifiable { 

required init() { 
    super.init() 
} 

required convenience init(node: Node, in context: Context) throws { 
    self.init() 
} 

required convenience init(realm: RLMRealm, schema: RLMObjectSchema) { 
    self.init(realm: realm, schema: schema) 
} 

required convenience init(value: Any, schema: RLMSchema) { 
    self.init(value: value, schema: schema) 
} 

在Swift 2.3（使用Realm和Genome的相應Swift 2.3版本）中，沒有任何這些初始化器都能正常工作，但現在它不起作用。

整個模型：

import RealmSwift 
import Genome 
import Realm 

protocol Identifiable { 
    var identifier: String { get set } 
} 


class BaseModel : RealmSwift.Object, MappableBase, Identifiable { 

required init() { 
    super.init() 
} 

required convenience init(node: Node, in context: Context) throws { 
    try self.init(node: node, in: context) 
} 

required convenience init(realm: RLMRealm, schema: RLMObjectSchema) { 
    self.init(realm: realm, schema: schema) 
} 

required convenience init(value: Any, schema: RLMSchema) { 
    self.init(value: value, schema: schema) 
} 

dynamic var identifier = "" 
dynamic var updatedAt: Date? 

override static func primaryKey() -> String { 
    return "identifier" 
} 

static func newInstance(_ node: Node, context: Context = EmptyNode) throws -> Self { 
    let map = Map(node: node, in: context) 
    let new = self.init() 
    try new.sequence(map) 
    return new 
} 

func sequence(_ map: Map) throws { 
    switch map.type { 
    case .fromNode: 
     if self.identifier.isEmpty { 
      // only map id if there isn't one, otherwise Realm complains about modified primaryKey 
      try self.identifier <~ map["id"] 
     } 
     updatedAt = Date() 
    case .toNode: 
     if !self.identifier.isEmpty { 
      try self.identifier ~> map["id"] 
     } 
    } 
} 

func objectRepresentation() -> [String : AnyObject] { 
    if let result = try? self.toObject() { 
     return result as? [String : AnyObject] ?? [:] 
    } else { 
     return [:] 
    } 
} 

static func objectInRealm(_ realm: Realm, identifier: String?) -> Self? { 
    if let identifier = identifier { 
     return realm.object(ofType: self, forPrimaryKey: identifier) 
    } else { 
     return nil 
    } 
} 

static func createOrFindObject(inRealm realm: Realm, identifier: String) -> Self { 
    if let foundObject = realm.object(ofType: self, forPrimaryKey: identifier) { 
     return foundObject 
    } else { 
     return realm.create(self, value: ["identifier" : identifier], update: false) 
    } 
} 
} 

Answer 1

你並不需要重寫init(realm:schema:)和init(realm:schema:)，只是定義convenience required init(node:in:) throws像下面這樣。

class BaseModel : RealmSwift.Object, MappableBase, Identifiable { 

    convenience required init(node: Node, in context: Context) throws { 
     try self.init(node: node, in: context) 
    } 

    ... 

}