Question

我是Realm的新手，我在尝试将JSON数据从WebService保存到我的Realm DB时遇到了一些麻烦。

这是JSON：

{  
   "Programacao":[  
      {  
         "Dia":"5",
         "Idp":"1833",
         "Programa":"T\u00e1 Na Hora",
         "Inicio":"06:00",
         "Final":"08:00",
         "Data":"08\/04\/2016"
      },
      {  
         "Dia":"5",
         "Idp":"1834",
         "Programa":"Bom dia Chiru",
         "Inicio":"08:00",
         "Final":"09:00",
         "Data":"08\/04\/2016"
      },
      {  
         "Dia":"5",
         "Idp":"1835",
         "Programa":"Conex\u00e3o",
         "Inicio":"09:00",
         "Final":"11:00",
         "Data":"08\/04\/2016"
      },
      {  
         "Dia":"5",
         "Idp":"1836",
         "Programa":"As Mais Pedidas",
         "Inicio":"11:00",
         "Final":"12:00",
         "Data":"08\/04\/2016"
      },
      {  
         "Dia":"5",
         "Idp":"1837",
         "Programa":"Casa da Sogra",
         "Inicio":"12:00",
         "Final":"13:00",
         "Data":"08\/04\/2016"
      },
      {  
         "Dia":"5",
         "Idp":"1838",
         "Programa":"Canal Livre",
         "Inicio":"13:00",
         "Final":"15:00",
         "Data":"08\/04\/2016"
      },
      {  
         "Dia":"5",
         "Idp":"18",
         "Programa":"Batid\u00e3o da Chiru",
         "Inicio":"15:00",
         "Final":"17:00",
         "Data":"08\/04\/2016"
      },
      {  
         "Dia":"5",
         "Idp":"1827",
         "Programa":"Sul Bandas",
         "Inicio":"17:00",
         "Final":"19:00",
         "Data":"08\/04\/2016"
      },
      {  
         "Dia":"5",
         "Idp":"1828",
         "Programa":"Voz do Brasil",
         "Inicio":"19:00",
         "Final":"20:00",
         "Data":"08\/04\/2016"
      },
      {  
         "Dia":"5",
         "Idp":"1831",
         "Programa":"Al\u00f4 Chiru",
         "Inicio":"20:00",
         "Final":"23:59",
         "Data":"08\/04\/2016"
      }
   ]
}

我创建了以下结构：

领域对象类：

import Foundation
import RealmSwift

class ROListing: Object {     // Programação da Rádio

  dynamic var id              = 0

  dynamic var showName        = ""
  dynamic var showId          = ""

  dynamic var showStartTime   = ""
  dynamic var showEndTime     = ""

  dynamic var showNumericDate = ""
  dynamic var showDate        = ""

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

}

对象操作类：

import Alamofire
import SwiftyJSON
import Foundation

class Listing: ResponseJSONObjectSerializable {

  var showName        :String?    // nomePrograma
  var showId          :String?    // idp

  var showStartTime   :String?    // inicioPrograma
  var showEndTime     :String?    // finalPrograma

  var showNumericDate :String?    // dia
  var showDate        :String?    // data

  required init?(json: JSON) {

    self.showName         = json["Programa"].string
    self.showId           = json["Idp"].string

    self.showStartTime    = json["Inicio"].string
    self.showEndTime      = json["Final"].string

    self.showNumericDate  = json["Dia"].string
    self.showDate         = json["Data"].string

  }

  required init() { }
}

class ListingArray: ResponseJSONObjectSerializable {

  var showArray: [Listing]?       // Programacao

  required init?(json: JSON) {

    if let arrayJson = json["Programacao"].array {
      self.showArray = []

      for json in arrayJson {
        let instance = Listing(json: json)
        self.showArray?.append(instance!)
      }

    }

  }

  required init() { }
}

通过以下方式与WebService连接：

func getRadioListing(success: () -> ()) {

    guard let url = apiController.createURLWithComponentsForListingsWith(appId: "63") else {
      print("Invlaid URL!")
      return
    }

    print(url)

    Alamofire.request(.GET, url).responseObject {
      (response: Response<ListingArray, NSError>) in

      if let jsonResults = response.result.value {
        self.listings = jsonResults

        for listing in self.listings.showArray! {
          RealmObjectManager.sharedInstance.createUpdateDB(withListing: listing)
        }

        success()

      } else {
        print("Error parsing JSON!")
        return
      }
    }

  }

最后，实际将对象保存到Realm DB的方法。

  func createUpdateDB(withListing listing: Listing) {

    print(Realm.Configuration.defaultConfiguration.path!)

    if self.listingArray.count == 0 {

      do {

        try self.realm.write {

          let newListing = ROListing()

          newListing.showName = listing.showName!
          newListing.showId = listing.showId!

          newListing.showStartTime = listing.showStartTime!
          newListing.showEndTime = listing.showEndTime!

          newListing.showNumericDate = listing.showNumericDate!
          newListing.showDate = listing.showDate!

          self.realm.add(newListing)
        }

      } catch let error as NSError {
        print("Error creating Listing DB: \(error.userInfo)")
      }
    }
  }

但是我无法将所有节目都放到数据库中。有人可以帮帮我吗？

提前致谢！

Answer 1

我无法在没有错误日志的情况下说出来，但看起来你的主键确实会出现问题。 Realm强制主键的唯一性，因此如果您尝试使用与相同类型的现有对象相同的主键向对象添加对象，它将会中断。据我所知，您默认将主键设置为0，但在保存之前您没有使用唯一值进行更新。

如果您只需要每个对象的唯一标识符，并且订单无关紧要，这是一个很好的解决方案：

dynamic var id: String = NSUUID().UUIDString

将数据从JSON保存到Realm

1 个答案: