How can I convert a Realm object to JSON in Swift? - json

Question

I have two Realm tables declared:
class Task: Object {
dynamic var taskID: String = ""
let taskAssignedTo = List<Contacts>()
}
class Contacts: Object {
dynamic var contactEmail: String = ""
dynamic var contactName: String = ""
}
Final goal is to convert the Task Realm object into JSON. The method I'm thinking of is:
Convert the object to a dictionary using a method within the class
func taskToDictionary() -> [String: AnyObject] {
return [
"taskID" : self.taskID,
"taskAssignedTo" : self.taskAssignedTo._rlmArray.count //Not sure how to get the array
]
}
Convert the resulting dictionary into JSON with SwiftyJSON
let taskObject = Task()
let newTaskJSON = JSON(taskObject.taskToDictionary())
Right now, this converts ok, but:
Is there a better way to do this?
How can I convert the RLMArray into an array for JSON conversion?

Answer 1

Managed to find the answer here:
Can I serialize a RealmObject to JSON or to NSDictionary in Realm for Swift?
extension Object {
func toDictionary() -> NSDictionary {
let properties = self.objectSchema.properties.map { $0.name }
let dictionary = self.dictionaryWithValuesForKeys(properties)
var mutabledic = NSMutableDictionary()
mutabledic.setValuesForKeysWithDictionary(dictionary)
for prop in self.objectSchema.properties as [Property]! {
// find lists
if let objectClassName = prop.objectClassName {
if let nestedObject = self[prop.name] as? Object {
mutabledic.setValue(nestedObject.toDictionary(), forKey: prop.name)
} else if let nestedListObject = self[prop.name] as? ListBase {
var objects = [AnyObject]()
for index in 0..<nestedListObject._rlmArray.count {
if let object = nestedListObject._rlmArray[index] as? Object {
objects.append(object.toDictionary())
}
}
mutabledic.setObject(objects, forKey: prop.name)
}
}
}
return mutabledic
}
}
Update for Xcode 7 & Swift 2:
extension Object {
func toDictionary() -> NSDictionary {
let properties = self.objectSchema.properties.map { $0.name }
let dictionary = self.dictionaryWithValuesForKeys(properties)
let mutabledic = NSMutableDictionary()
mutabledic.setValuesForKeysWithDictionary(dictionary)
for prop in self.objectSchema.properties as [Property]! {
// find lists
if let nestedObject = self[prop.name] as? Object {
mutabledic.setValue(nestedObject.toDictionary(), forKey: prop.name)
} else if let nestedListObject = self[prop.name] as? ListBase {
var objects = [AnyObject]()
for index in 0..<nestedListObject._rlmArray.count {
let object = nestedListObject._rlmArray[index] as AnyObject
objects.append(object.toDictionary())
}
mutabledic.setObject(objects, forKey: prop.name)
}
}
return mutabledic
}
}
Update to Xcode 8 and Swift 3 :
extension Object {
func toDictionary() -> NSDictionary {
let properties = self.objectSchema.properties.map { $0.name }
let dictionary = self.dictionaryWithValues(forKeys: properties)
let mutabledic = NSMutableDictionary()
mutabledic.setValuesForKeys(dictionary)
for prop in self.objectSchema.properties as [Property]! {
// find lists
if let nestedObject = self[prop.name] as? Object {
mutabledic.setValue(nestedObject.toDictionary(), forKey: prop.name)
} else if let nestedListObject = self[prop.name] as? ListBase {
var objects = [AnyObject]()
for index in 0..<nestedListObject._rlmArray.count {
let object = nestedListObject._rlmArray[index] as AnyObject
objects.append(object.toDictionary())
}
mutabledic.setObject(objects, forKey: prop.name as NSCopying)
}
}
return mutabledic
}
}

Answer 2

As i can't comment, #Eric
Based on #Eugene Teh answer
I had to do a specific treatment for date. Here is my code (swift 3)
I get the value first
if let value = self.value(forKey: props.name) {
if props.type == .date {
mutabledic[props.name] = (value as! Date).timeIntervalSince1970
//for using like the example, this should work
//mutabledic.setObject( (value as! Date).timeIntervalSince1970, forKey: prop.name as NSCopying)
}
[..]//other case
}

Answer 3

Swift 4.2 Xcode 11
This is how i solved the issue. To covert Realm Objects into JSON Array for sending to the Rest APIs
Requirement - SwiftyJSON
func getJsonArray(){
var dicArray = [Dictionary<String,AnyObject>]()
for item in cartsData! {
dicArray.append(item.toDictionary())
}
print(JSON(dicArray))
}
cartsData - var cartsData : Results<...>?
extension Object {
func toDictionary() -> [String:AnyObject] {
let properties = self.objectSchema.properties.map { $0.name }
var dicProps = [String:AnyObject]()
for (key, value) in self.dictionaryWithValues(forKeys: properties) {
//key = key.uppercased()
if let value = value as? ListBase {
dicProps[key] = value.toArray1() as AnyObject
} else if let value = value as? Object {
dicProps[key] = value.toDictionary() as AnyObject
} else {
dicProps[key] = value as AnyObject
}
}
return dicProps
}
}
extension ListBase {
func toArray1() -> [AnyObject] {
var _toArray = [AnyObject]()
for i in 0..<self._rlmArray.count {
let obj = unsafeBitCast(self._rlmArray[i], to: Object.self)
_toArray.append(obj.toDictionary() as AnyObject)
}
return _toArray
}
}