[英]Parse JSON and save with Realm
I have this JSON data: 我有以下JSON数据:
{
"id": 120,
"userId": 1,
"key": [
56,
21,
133,
77
]
}
I use JSONHelper to parse it, and save it locally with Realm . 我使用JSONHelper进行解析,并使用Realm将其保存在本地。
The problem is that I can't save the Int array locally and if I try to change the object to a simple object in Swift, the parser doesn't work. 问题是我无法在本地保存Int数组,并且如果我尝试在Swift中将对象更改为简单对象,则解析器将无法正常工作。
class Response: RLMObject, Deserializable {
dynamic var _id = 0
dynamic var userId = 0
var key = List<HashInt>()
required init(data: JSONDictionary) {
super.init()
_id <-- (data["id"])
userId <-- data["userId"]
key <-- data["key"]
}
override init() {
super.init()
}
}
class HashInt: Object, Deserializable {
dynamic var value = ""
required init(data: JSONDictionary) {
super.init()
value <-- data["value"]
}
required init() {
super.init()
}
}
I need to parse the Int array and save it locally with Realm. 我需要解析Int数组,并使用Realm将其保存在本地。 How can I achieve that?
我该如何实现?
First of all, you'll need to decide between Realm Swift and Realm Objective-C. 首先,您需要在Realm Swift和Realm Objective-C之间做出选择。 You can't mix both.
不能混用。 Either you let your objects inherit from
Object
or RLMObject
. 您可以让对象继承自
Object
或RLMObject
。 In my answer I'll assume, you want to go full Swift. 在我的回答中,我假设您想全面学习Swift。
You can't map via JSONHelper, because it doesn't have a concept of constructing Realm Swift's List
type. 您无法通过JSONHelper进行映射,因为它没有构造Realm Swift的
List
类型的概念。 But you can map to a Swift array. 但是您可以映射到Swift数组。
var keyObjects = [HashInt]()
keyObjects <-- data["key"]
for keyObject in keyObjects {
key.append(keyObject)
}
If you have more than one to-many relationship, it would make sense to look into overloading JSONHelper's mapping operator ( <--
), so that it supports mapping to Realm Swift's List
type. 如果您有多个关系,则可以考虑重载JSONHelper的映射运算符(
<--
),以便它支持映射到Realm Swift的List
类型。 This might look like below. 如下所示。 (untested!)
(未经测试!)
import RealmSwift
public func <-- <T: Deserializable>(list: List<T>, dataObject: AnyObject?) {
var newArray = [T]()
newArray <-- dataObject
for object in newArray {
list.append(object)
}
return list
}
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