I am trying to take all the preloaded data that I entered into Realm Database and use it in my app. The problem I am having is that I am not able to load all the objects into a Results variable of my custom type. I have 530 entries in my preloaded database and none of them are showing up in the View Controller.
This data in stored in /Database/streetListings.realm
import UIKit
import RealmSwift
class StreetListing: Object {
#objc dynamic var houseNumber: String?
#objc dynamic var streetName: String = ""
#objc dynamic var trashDay: String = ""
convenience init(houseNumber: String?, streetName: String, trashDay: String) {
self.init()
self.houseNumber = houseNumber
self.streetName = streetName
self.trashDay = trashDay
}
}
import UIKit
import RealmSwift
class ViewController: UIViewController {
var realm: Realm!
var streetListings: Results<StreetListing>?
override func viewDidLoad() {
super.viewDidLoad()
let realmPath = Bundle.main.url(forResource: "streetListings", withExtension: "realm")!
let realmConfiguration = Realm.Configuration(fileURL: realmPath, readOnly: true)
realm = try! Realm(configuration: realmConfiguration)
streetListings = realm.objects(StreetListing.self)
}
}
(lldb) po realmPath
▿ file:///Users/raz/Library/Developer/CoreSimulator/Devices/3A4F3C1A-9C15-4AF0-B211-5125E3843075/data/Containers/Bundle/Application/B1331B06-EDFE-494C-A170-7FDB1B2CA291/NorthTrash.app/streetListings.realm
- _url : file:///Users/raz/Library/Developer/CoreSimulator/Devices/3A4F3C1A-9C15-4AF0-B211-5125E3843075/data/Containers/Bundle/Application/B1331B06-EDFE-494C-A170-7FDB1B2CA291/NorthTrash.app/streetListings.realm
(lldb) print realmConfiguration
(RealmSwift.Realm.Configuration) $R32 = {
_syncConfiguration = nil
_path = "/Users/raz/Library/Developer/CoreSimulator/Devices/3A4F3C1A-9C15-4AF0-B211-5125E3843075/data/Containers/Bundle/Application/B1331B06-EDFE-494C-A170-7FDB1B2CA291/NorthTrash.app/streetListings.realm"
_inMemoryIdentifier = nil
encryptionKey = nil
readOnly = true
schemaVersion = 0
migrationBlock = nil
deleteRealmIfMigrationNeeded = false
shouldCompactOnLaunch = nil
maximumNumberOfActiveVersions = nil
customSchema = nil
disableFormatUpgrade = false
}
(lldb) po streetListings
▿ Optional<Results<StreetListing>>
▿ some : Results<StreetListing> <0x7fbd2e607140> (
)
- rlmResults : RLMResults<StreetListing> <0x7fbd2e607140> (
)
If anyone can help me out with this that would be great. Thank you!
I have also worked on Realm Project.
Here is simple tip for loading all Object.
let realm = try? Realm()
let personData = realm?.objects(Person.self)
//write code for loading personData
Loading lot of objects can take time. Try accessing streetListings after a delay. Not sure why you need the database to be readOnly. If not, you can use NotificationToken to listen to changes made to the realm database.
I was able to get this to work. I changed my custom class from 'streetListings' to 'StreetListings'. Also created a brand new Xcode project and transferred all the existing files.
Related
I have been trying to create model like firebase database structure. I can able to create normal string, bool and int value but not able to do array and dictionary.
Here is my firebase structure screenshot:
Here i am trying to add groupMembers and to in model like firebase structure.
Here is my Model i tried to create with array and dictionary:
import Foundation
import RealmSwift
class RealmMessages: Object {
#objc dynamic var messageText : String?
#objc dynamic var sender: String?
let chatCreatedDateTimee = List<timeStampValue>()
#objc dynamic var chatId: String?
#objc dynamic var from: String?
#objc dynamic var groupMemberss : [String: String]!
let groupMemebersCount = RealmOptional<Int>()
#objc dynamic var task: Bool = false
#objc dynamic var to: Array = [String]()
}
class timeStampValue: Object {
let timestamp = RealmOptional<Int>()
}
Here is my contoller code: Trying to add value into realm database.
var dic : [String : String] = [:]
var cont = ["one", "two", "three"]
var oneVal = ["909090": "SELF", "808080": "Other"]
override func viewDidLoad() {
super.viewDidLoad()
let realm = try! Realm()
print("realm location:::\(String(describing: Realm.Configuration.defaultConfiguration.fileURL))")
let myMessage = RealmMessages()
myMessage.messageText = "Diva"
myMessage.sender = "yIvq1mQxjfZpjs1ybRTTlDOmUKV2"
let timevalue = timeStampValue()
timevalue.timestamp.value = 123123131
myMessage.chatId = "+918000080000"
myMessage.from = "+918000080000"
myMessage.groupMemberss = oneVal
myMessage.to = cont
try! realm.write {
realm.add(myMessage)
}
}
How to get groupMemberss and to structure in realm database like firebase. And how to create array and dictionary in realm
There are a number of solutions but here's two.
Assuming the data has been read in and the data from the groupMembers snapshot is sitting in a dictionary var that looks like this
let groupMembersDict = [
"919": "participant",
"111": "observer",
"222": "participant"
]
To store that in Realm, you can work with primitives and store each key and value in a separate List (think: Array) or you can leverage a managed Realm object and store those in a List.
If you want to keep the data within an object; here's what it would look like.
class GroupData: Object {
#objc dynamic var num = ""
#objc dynamic var type = ""
convenience init(withNum: String, andType: String) {
self.init()
self.num = withNum
self.type = andType
}
}
Here's the main object showing both options; either option 1: store the key value pairs in two arrays, or option 2: use the above GroupData object to store the key value pairs together
class Messages: Object {
#objc dynamic var messageText = ""
//option 1: two lists of primative strings that can be accessed like an array.
// downside is managing two lists
let groupNum = List<String>()
let groupType = List<String>()
//option 2: a list of members using another Realm object
let groupNumType = List<GroupData>()
}
And some code to create two messages, one of each type
let msg0 = Messages()
msg0.messageText = "My message"
for member in groupMembersDict {
msg0.groupNum.append( member.key )
msg0.groupType.append( member.value )
}
let msg1 = Messages()
msg1.messageText = "This message"
for member in groupMembersDict {
let aGroup = GroupData(withNum: member.key, andType: member.value)
msg1.groupNumType.append(aGroup)
}
store them in realm
realm.add(msg0)
realm.add(msg1)
read them both in an display the message from option 2. Option 1 would be just iterating over the arrays to print the group data
let messageResults = realm.objects(Messages.self)
for msg in messageResults {
print(msg.messageText)
for group in msg.groupNumType {
print(group.num, group.type)
}
}
Keep in mind that all managed properties must be primitives: NSString, NSDate, NSData, NSNumber or List, Results, RLMLinkingObjects, or subclasses of RLMObject like the GroupData shown above.
i'm new in using realm, i'm trying to save my api response in realm database. For that i read out there documents and started my work, I have created class of Objects in which a have my variables in which i want to save data now when i add data in realm app crashes with error, Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value. This is my class of Objects,
class SingleChatRealm: Object {
var actualNameFor_1_2_1_chat = ""
var isGroup : Bool = true
var isNewGroup : Bool = false
var lastMessage = ""
var lastMsgRead : Bool = false
var lastMsgTime = ""
var lastMsgTimeActual = ""
var name = ""
var profilePic = ""
var roomSID = ""
var unReadMsgsCount = 0
var twChannelObj : TCHChannel?
var members = [TCHMember]()
var messages = [TCHMessage]()
// #objc dynamic var group_info : [String:JSON]?
}
and this is how i'm storing data in realm,
let realm = try! Realm()
try! realm.write {
let newListing = SingleChatRealm()
for items in dateWiseSortedSingleRooms
{
newListing.actualNameFor_1_2_1_chat = items.actualNameFor_1_2_1_chat
newListing.isGroup = items.isGroup
newListing.isNewGroup = items.isNewGroup
newListing.lastMessage = items.lastMessage
newListing.lastMsgRead = items.lastMsgRead
newListing.lastMsgTime = items.lastMsgTime
newListing.lastMsgTimeActual = items.lastMsgTimeActual
newListing.members = items.members
newListing.messages = items.messages
newListing.name = items.name
newListing.profilePic = items.profilePic!
newListing.roomSID = items.roomSID
newListing.twChannelObj = items.twChannelObj
newListing.unReadMsgsCount = items.unReadMsgsCount
print(newListing)
self.realm.add(newListing)
}
}
My app crashes on this line self.realm.add(newListing) with above given error, why is it so? what's i'm missing in this?
There may be several reasons for that,
Make all the variables #objc dynamic var.
Make sure your realm object is global within the class, otherwise remove self from self.realm.add(newListing).
Make sure all the values you are assigning to the variables of newListing are not nil(Those variables which you have already initiated with some default values).
What are the actual data type of TCHChannel, TCHMember and TCHMessage? These type may not be supported by Realm.
Make sure you did not modify the SingleChatRealm class structure after adding an entry to realm. In that case you have to delete the old .realm file and have to create a new one.
You just created a new instance of Realm, but self.realm is still nil, you should add line:
self.realm = realm
to your code:
let realm = try! Realm()
self.realm = realm
try! realm.write {
let newListing = SingleChatRealm()
for items in dateWiseSortedSingleRooms
{
newListing.actualNameFor_1_2_1_chat = items.actualNameFor_1_2_1_chat
newListing.isGroup = items.isGroup
newListing.isNewGroup = items.isNewGroup
newListing.lastMessage = items.lastMessage
newListing.lastMsgRead = items.lastMsgRead
newListing.lastMsgTime = items.lastMsgTime
newListing.lastMsgTimeActual = items.lastMsgTimeActual
newListing.members = items.members
newListing.messages = items.messages
newListing.name = items.name
newListing.profilePic = items.profilePic!
newListing.roomSID = items.roomSID
newListing.twChannelObj = items.twChannelObj
newListing.unReadMsgsCount = items.unReadMsgsCount
print(newListing)
self.realm.add(newListing)
}
}
I cannot seem to save data to realm in Swift!
In one of my classes I have the following:
func getDeviceIdAndPersist(){
print("getDeviceIdAndPersist")
let realm = try! Realm()
let realmWallet = RealmWallet()
let realmResults = realm.objects(RealmWallet.self)
for results in realmResults {
guard results.deviceId != nil else {
realmWallet.deviceId = NSUUID().UUIDString
try! realm.write() {
realm.add(realmWallet, update: true)
}
return
}
}
}
And it does not seem to save the data! I have code similar to this throughout my application and its saving data but this isn't!
Also I'm having trouble trying to persist my data, after i launch the application the data is stored using realm (which i can verify using the realm browser). However, once I re-launch the application the data no longer exists in realm! Does anyone have any suggestions as to why the data would not be persisted?
EDIT 1
Here is my realm class
class RealmWallet: Object {
dynamic var publicKey = NSData()
dynamic var preferredAddress = ""
dynamic var id = 0
let walletAddresses = List<Addresses>()
dynamic var fee: NSNumber = 0.0
dynamic var deviceId: String? = nil
dynamic var tempPreTax: String? = nil
dynamic var portalToken: String? = nil
let walletHasBackup = RealmOptional<Bool>()
let alreadyAskedForBluetooth = RealmOptional<Bool>()
let insecureMailSent = RealmOptional<Bool>()
let cameraAccessGranted = RealmOptional<Bool>()
let idNowSuccess = RealmOptional<Bool>()
dynamic var marketInfos = NSData()
override class func primaryKey() -> String? {
return "id"
}
}
EDIT 2
The NSUUID isn't the only data which I cannot save, the following is another example of data which I cannot seem to save using Realm:
onboardingModal!.bluetoothPressed = {() -> Void in
print("after onboardingModal")
self.cbManager = CBCentralManager(delegate: self, queue: nil)
print("REALM")
let realm = try! Realm()
do {
try! realm.write {
print("IN WRITE")
self.realmWallet.alreadyAskedForBluetooth.value = true
realm.add(self.realmWallet, update: true)
}
}
}
I faced the same problem. In my realm class i was missing #objc dynamic in front of stored properties. So added it like below. Then it worked for me.
#objc dynamic var address: Addres!
#objc dynamic var checklist: Checklist!
If your Results count is 0, it will not enter your for loop.
Try this instead.
func getDeviceIdAndPersist() {
let realm = try! Realm()
let realmResults = realm.objects(RealmWallet.self)
guard results.count > 0 else {
let realmWallet = RealmWallet()
realmWallet.deviceId = NSUUID().UUIDString
try! realm.write() {
realm.add(realmWallet, update: true)
}
return
}
}
I have two classes. First looks like that:
class Person: Object {
dynamic var owner: String?
var dogs: List<Dogs>()
}
and second class which looks like that:
class Dogs: Object {
dynamic var name: String?
dynamic var age: String?
}
and now in ViewController in 'viewDidLoad' I create object Person with empty List and save it in Realm
func viewDidLoad(){
let person = Person()
person.name = "Tomas"
try! realm.write {
realm.add(Person.self)
}
}
it works great and I can create Person, problem begins when I try to read this data in SecondViewController in ViewDidLoad doing it:
var persons: Results<Person>?
func viewDidLoad(){
persons = try! realm.allObjects()
}
and try to add new Dog to List doing it in button action:
#IBAction func addDog(){
let newDog = Dogs()
newDog.name = "Rex"
newDog.age = "2"
persons[0].dogs.append(newDog)
// in this place my application crashed
}
Here my app is crashing with an information: Can only add, remove, or create objects in a Realm in a write transaction - call beginWriteTransaction on an RLMRealm instance first. How can I add new Dog to List and how can I update person[0]?
I use SWIFT 3.0
The persons property is of type Results<Person>, which is a collection containing Person objects that are managed by a Realm. In order to modify a property of a managed object, such as appending a new element to a list property, you need to be within a write transaction.
try! realm.write {
persons[0].dogs.append(newDog)
}
Write something like this:
if let person = persons?[0] {
person.dogs.append(newDog)
}
try! realm.write {
realm.add(person, update: true)
}
Please check how are you getting realm. Each time you call defaultRealm, you are getting new realm.
Side Note: Besides adding the code inside the write transaction which solves your issue, you could query Person by name as follow...
#IBAction func addDog(){
let newDog = Dogs()
newDog.name = "Rex"
newDog.age = "2"
let personName = realm.objects(Person.self).filter("name = 'Tomas'").first!
try! realm.write {
personName.dogs.append(newDog)
}
}
Add object for Realm Database
class Task : Object {
#objc dynamic var id : Int = 0
#objc dynamic var name = ""
#objc dynamic var phone = ""
#objc dynamic var address = ""
}
#IBAction func buttonSave(_ sender: Any) {
let realm = try! Realm()
let user = Task()
user.id = 0
user.name = (txtName.text! as NSString) as String
user.phone = (txtPhone.text! as NSString) as String
user.address = (txtAddress.text! as NSString) as String
try! realm.write {
realm.add(user)
print("user:",user.name)
}
}
I'm new in programming and I would like to know how I can store data in a List with RealmSwift.
Considering the following model:
import RealmSwift
class ScanResults: Object{
dynamic var id = 0
dynamic var resource = ""
dynamic var scanDate = ""
let ScanResultsDetail = List<ScanResultsDetails>()
}
class ScanResultsDetails: Object{
dynamic var scanner = ""
dynamic var result = ""
}
This is an example how I store new ScanResults:
let newResults = ScanResults()
newResults.id = newResults.IncrementaID()
newResults.resource = "Test"
newResults.scanDate = "19.01.2016"
do{
try uiRealm.write({ () -> Void in
uiRealm.add(newResults)
})
}
catch{
}
My Question is now, how can I store data in the list? I can't figure it out.. Can you give me an example?
I don't see that you append any object to ScanResultsDetail in your example
Here is quick example based on swift source code (docs):
class Dog: Object {
dynamic var name = ""
dynamic var age = 0
}
class Person: Object {
dynamic var name = ""
let dogs = List<Dog>()
}
let realm = try! Realm() // Create realm pointing to default file
// Link objects
let person = Person()
person.name = "Tim"
person.dogs.append(mydog)
try! realm.write {
realm.add(person)
}