Objectmapper get array of one item within JSON - arrays

Question

So I have the following JSON, which I am using together with ObjectMapper and Realm.
{
"result": [
{
"id": 20,
"types": [
"now"
],
"url": "/nl/whereto/ezrhgerigerg",
"categories": [
{
"id": 39,
"name": "Food "
},
{
"id": 21,
"name": "Varia"
}
]
},
My problem is getting the data from "types", which for some items in the array says "now" or "later", and is empty for other items (hence, no types item is given).
I tried to do the following in my mapping:
class Publication: Object, Mappable {
dynamic var id:Int = 0
var typez = List<getType>()
dynamic var url:String?
required convenience init?(_ map: Map) {
self.init()
}
override static func primaryKey() -> String? {
return "id"
}
func mapping(map: Map) {
id <- map["id"]
typez <- map["types"]
url <- map["url"]
}
}
class getType: Object, Mappable {
dynamic var text: String = ""
required convenience init?(_ map: Map) {
self.init()
}
func mapping(map: Map) {
text <- map[""]
}
}
When I check the Realm database, you can see that typez, an array of [getType] was made, but it's empty for all items (even the ones where types is "now"). The other two items (id and url) are filled in in the database.
What am I doing wrong that it won't save to the database?

Answer 1

Because Realm cannot detect assigning List properties since List property is not Objective-C type. So List properties should be declared as let, and should not be nil. You should use append/remove.../insert...method to modifying theList`.
So your code
typez <- map["types"]
doesn't work, since you assign values to the typez property directly.
The workaround is like the following:
func mapping(map: Map) {
...
var typez: [String]? = nil
typez <- map["types"]
typez?.forEach { t in
let obj = getType()
obj.text = t
self.typez.append(obj)
}
...
First, store the mapped value to the local variable (it is string array). Then convert the string array to objects. Then append the objects to the List property.