Restkit, Swift, Core data 一对多

Posted 2023-02-23

【中文标题】Restkit, Swift, Core data 一对多

【英文标题】：Restkit, Swift, Core data one to many

【发布时间】：2015-08-31 12:28:42

【问题描述】：

我就是想不通这个错误：

由于未捕获的异常 'NSInvalidArgumentException' 导致应用程序终止，原因：'*** setObjectForKey: key cannot be nil

这里是一些示例 JSON

["storeId":"22","storeName":"Jewel Osco","storeAddress1":"890 N Western Ave","storeAddress2":"","storeCity":"Lake Forest","storeState":"IL","storeZipCode":"","storeGfCount":"71","storeListCount":"2","storeDistance":"1.13","products":["storeId":"22","productId":"61","upcCode":"00090800000751","brandDesc":"Herb Pharm","productName":"Herb Pharm Black Elderberry Herbal Glycerite Extract","storeId":"22","productId":"64","upcCode":"00698997807308","brandDesc":"Udi's","productName":"Udi's Soft N' Chewy Granola Bars Chocolate Chip - 5 CT"]]

这是一个包含一对多产品数组的商店数组。

如果我在没有关系的情况下运行查询，它将完美运行。但是，当我添加关系时，它会失败。

这是相关的映射：

    class func defaultMapping(objectManager:RKObjectManager!) -> RKEntityMapping

    let managedObjectStore:RKManagedObjectStore = objectManager.managedObjectStore!
    let defaultMapping = RKEntityMapping(forEntityForName: "LocatorStoreProduct", inManagedObjectStore: managedObjectStore)

    defaultMapping.identificationAttributes = ["productId","storeId"]

    let mappingDictionary:[String:String] = [
        "productId":"productId" ,
        "storeId":"storeId" ,
        "upcCode":"upcCode" ,
        "brandDesc":"brand" ,
        "productName":"productName"
    ]


    defaultMapping.addAttributeMappingsFromDictionary(mappingDictionary)

    return defaultMapping

这里是映射的赋值：

class func defaultMapping(objectManager:RKObjectManager!) -> RKEntityMapping

    let managedObjectStore:RKManagedObjectStore = objectManager.managedObjectStore!
    let defaultMapping = RKEntityMapping(forEntityForName: "LocatorStore", inManagedObjectStore: managedObjectStore)

    defaultMapping.identificationAttributes = ["extId"]

    let mappingDictionary:[String:String] = [
        "storeId":"extId" ,
        "storeName":"storeName" ,
        "storeAddress1":"address1" ,
        "storeAddress2":"address2" ,
        "storeCity":"city" ,
        "storeState":"state" ,
        "storeZipCode":"zipCode" ,
        "stoerGfCount":"totalCount",
        "storeListCount":"inListCount",
        "storeDistance":"distance" 
    ]

    defaultMapping.addAttributeMappingsFromDictionary(mappingDictionary)


    //HERE IS MY RELATIONSHIP MAPPING:

    let lspMapping = LocatorStoreProduct.defaultMapping(objectManager)
    let relationshipMapping = RKRelationshipMapping(fromKeyPath: "products", toKeyPath: "locatorStoreProducts", withMapping: lspMapping)

    defaultMapping.addPropertyMapping(relationshipMapping)

    return defaultMapping

盯着这个看了好几个小时，看不到我错过了什么键

【参考方案1】：

代码是正确的。我已将我的 obj 从 LocatorStoreProducts 重命名为 LocatorStoreProduct。在重构中遗漏了一个明显的地方