Realm-java: help, please

[Jparrgam]

in migration android, add new field from table in database

schema.get("RealmUserInfo") .addRealmObjectField("userInfo_temp", valueSchema) .transform(obj -> { JsonObject jsonObject = new JsonParser().parse(obj.getString("historyUserInfo")).getAsJsonObject(); if (jsonObject != null) { Info info = Utils.jsonToObject(Info.class, jsonObject.getAsJsonObject("user").toString()); DynamicRealmObject valueObj = obj.get("userInfo_temp"); valueObj.setInt("id", info.getId()); valueObj.setString("firstName", info.getFirstName()); valueObj.setString("lastName", info.getLastName()); valueObj.setString("email", info.getEmail()); valueObj.setString("phone", info.getPhone()); valueObj.setString("fbId", info.getFbId()); valueObj.setString("referralCode", info.getReferralCode()); valueObj.setInt("numberOrders", info.getNumberOrders()); valueObj.setString("lastOrderDate", info.getLastOrderDate()); valueObj.setInt("creditAvailable", info.getCreditAvailable()); valueObj.setInt("freeDeliveryDays", info.getFreeDeliveryDays()); valueObj.setString("freeDeliveryExpirationDate", info.getFreeDeliveryExpirationDate()); valueObj.setInt("freeDeliveryNextOrder", info.getFreeDeliveryNextOrder()); valueObj.setInt("canRefer", info.getCanRefer()); valueObj.setString("oauthVerifier", info.getOauthVerifier()); valueObj.setInt("orderIdToScore", info.getOrderIdToScore()); valueObj.setString("imageFacebook", info.getImageFacebook()); valueObj.setInt("phoneValidated", info.getPhoneValidated()); valueObj.setString("phoneValidatedMessage", info.getPhoneValidatedMessage()); valueObj.setBoolean("hasVisaPurchases", info.getHasVisaPurchases()); valueObj.setInt("sendAdvertising", info.getSendAdvertising()); valueObj.setInt("isNew", info.isNew()); valueObj.setList("creditCards", info.getCreditCards()); valueObj.setList("directions", info.getDirections()); } }) .removeField("userInfo") .renameField("userInfo_temp", "userInfo");

in this line DynamicRealmObject valueObj = obj.get("userInfo_temp"); object is null, why this ?

[Zhuinden]

Because you've just created the field and default value is null.

You're probably looking for dynamicRealm.createObject(clazz)

[Jparrgam]

@Zhuinden in realm it's not allowed to have two primary keys with the same value ?

[Zhuinden]

Well I mean it's the same object, no?

Generally you want something like

MyObj myObj = realm.where(MyObj.class).equalTo("id", 5L).findFirst();
if(myObj == null) myObj = realm.createObject(MyObj.class, 5);

[Jparrgam]

@Zhuinden thanks!

I have a new question, in my model I have fields types Double

var latitude: Double = 0.toDouble()

in migration have this exception

'Direction.latitude' has been made required.

[Jparrgam]

@Zhuinden thanks for your help

[Jparrgam]

@Zhuinden why this exception ?

java.lang.IllegalArgumentException: RealmList must contain DynamicRealmObject's, not Java model classes.

[Zhuinden]

Oh right, you're trying to do a migration.

Then it's the same concept but instead of

MyObj myObj = realm.where(MyObj.class).equalTo("id", 5L).findFirst();
if(myObj == null) myObj = realm.createObject(MyObj.class, 5);

you need

DynamicRealmObject myObj = realm.where("MyObj").equalTo("id", 5L).findFirst();
if(myObj == null) myObj = realm.createObject("MyObj", 5);