When free transfers are available, we will announce it on the official World of Warcraft forums. Before you start a free transfer, check our Free Character Transfer Eligibility and Limitations article. If your realm is full and experiences login queues, you may be offered to transfer your character to another realm for free while you are queued to enter your realm.
In that case, click on the Character Migration button while on the queue. This will open the Shop. Alternatively, if free migrations are currently open for your realm, you can start a free transfer by opening the in-game Shop on the character selection screen. If the Shop button is missing, it means your account is restricted by Parental Controls.
The Character Migration window will instantly close without any message. However, your transfer is in progress. Note : You cannot log in to your character until the transfer has completed and you cannot cancel a transfer in progress. Customer Support cannot cancel a transfer or speed up the transfer process. Character transfers are irreversible. Fields marked static and transient are always ignored, and do not need the Ignore annotation.
Realm offers MutableRealmInteger as a special integer type. MutableRealmInteger exposes an additional API that can more clearly express intent and generate better conflict resolution steps when using Synchronized Realms.
Traditionally, a counter would be implemented by reading a value, incrementing it and setting it myObj. This will not work well in an asynchronous situation — for example when two clients are offline — because both parties will read a value, say 10 , increment it, and store the value as MutableRealmInteger s are backed by traditional integer types, so no migration is required when changing a field from byte , short , int or long to MutableRealmInteger.
MutableRealmInteger is not an immutable type standard like primitive number types in Java. This means the value contained inside the MutableRealmInteger can change when a Realm is written to. For this reason MutableRealmInteger fields must be marked final. To change the counter value, simply call counter. Calling set can potentially override increment and decrement operations coming from other devices pr.
The default behaviour is that Realm will use the name defined in the model class as the name to represent classes and fields internally in the Realm file. In some cases you might want to change this behaviour:. In those cases you can override the name being used internally by defining a different name using the RealmModule , RealmClass or RealmField annotations.
You can define a naming policy at the module level , which will affect all classes part of the module:. You can define a custom name for the class or a field naming policy that will effect all fields in that class. This will override any module level settings:. You can define a custom name for a field, this will override any Class and Module level settings:. Choosing an internal name that differs from the name used in the Java model classes has the following implications:. See RealmNamingPolicy for more info.
RealmObject s are live, auto-updating views into the underlying data; you never have to refresh objects. Changes to objects are instantly reflected in query results. This not only keeps Realm fast and efficient, it allows your code to be simpler and more reactive. You can subscribe to Realm notifications to know when Realm data is updated. Extend your class from RealmObject. You can let the fields be public, and can use simple assignments instead of setters and getters.
You can use Dog like any other class: you can add logic to your getter and setter methods for example, for validation , and you can add any custom methods you wish. Instead of extending RealmObject , your classes can implement the RealmModel interface, adding the RealmClass annotation:. With this interface, all methods available on RealmObject become available through static methods. Add single objects through Realm.
If the field is optional, its value will be set to the field default when creating an object, and to null when updating an object. Realm offers abstract utility classes to help bind data coming from OrderedRealmCollection s both RealmResults and RealmList implement this interface to standard UI widgets. Javadoc for the adapters can be found here and an example of their use can be found here.
For example, if an object has a primary key , pass the primary key value in the Intent extras bundle:. Retrieve the primary key value from the bundle on the receiving end Activity, Service, IntentService, BroadcastReceiver, etc. You can find working examples in the Object Passing portion of the threading example. You can link any two RealmObjects together. To set up a many-to-one or one-to-one relationship, give a model a property whose type is one of your RealmObject subclasses:.
Each Contact has zero or one Email instances. Nothing would prevent you from using the same Email object with more than one Contact ; the distinction between a many-to-one and a one-to-one relationship is up to your application. This deletes the relationship between bob and email1 , but email1 is still in the Realm.
You can use the same object in different RealmList s, and you can use this to model both one-to-many and many-to-many relationships. It is possible to declare recursive relationships which can be useful when modeling certain types of data. Setting the value to null for a RealmList field will clear the list.
The getter for a RealmList will never return null : the returned object is always a list. The length might be zero. Relationships are unidirectional. Take the two classes Person and Dog as an example:. You can resolve this by giving the Dog a LinkingObjects annotation.
Since relationships are either many-to-one or many-to-many, following inverse relationships could result in 0, 1 or more objects. Like any other RealmResults set, you can query an inverse relationship. Realm model classes can contains lists of primitive data types.
Before Realm Java 4. You can migrate from this approach to lists of primitives using the following migration code:. The default schema for a Realm is simply all the Realm model classes in a project. However, you can change this behavior—for instance, you might want to restrict a Realm to only contain a subset of classes.
To do this, create a custom RealmModule. For library developers: Libraries that include Realm must expose and use their schema through a RealmModule.
Doing so prevents the default RealmModule from being generated for the library project, which would conflict with the default RealmModule used by the app. If you have two or more RealmModule s, you will have to split the declarations into several files with exactly one declaration per file. See a complete example of how RealmModules work between library and app projects here. Unlike read operations, write operations in Realm must be wrapped in transactions.
At the end of a write operation, you can either commit the transaction or cancel it. Committing a transaction writes all changes to disk and if the Realm is synced, queues it for synchronization with Realm Object Server.
If you cancel a write transaction, all the changes are discarded. This helps guarantee data consistency, as well as providing thread safety. Write transactions block each other. This can cause ANR errors if you create write transactions on both the UI and background threads at the same time. To avoid this, use async transactions when creating write transactions on the UI thread. If you use executeTransaction , this happens automatically. Unless you need to make simultaneous transactions from many threads at once, you can favor larger transactions that do more work over many fine-grained transactions.
When you commit a write transaction to a Realm, all other instances of that Realm will be notified and be updated automatically. If you create an object instance first and use copyToRealm to add it to a Realm, you should wrap the copy action in a transaction, too. Realm supports as many custom constructors as you like as long as one of them is a public no-arguments constructor. Remember, Realm only manages the returned object realmUser in this example , not the object originally copied user.
To make changes to the object in the database, make changes to the returned copy, not the original. If you are only interestered in inserting the object and not using the managed copy right away, it is possible to use insert instead.
This works in a similar way to copyToRealm but is much faster as not returning the object makes it possible to optimize it more. If you are inserting many objects, the recommend approach is to use insert or insertOrUpdate.
Since transactions are blocked by other transactions, you might want to write on a background thread to avoid blocking the UI thread. By using an asynchronous transaction, Realm will run that transaction on a background thread. OnSuccess and OnError callbacks are both optional, but if provided, they will be called when the transaction succeeds or fails, respectively.
Callbacks are controlled by the Looper , so they are only allowed on Looper threads. Forgetting to cancel a transaction can crash the app if the callback updates the UI! If you need to update many objects at once, then the most efficient way is making a query that find the objects and use one of RealmResults. It is also possible to use a generic set method called RealmResults.
This is similar to how DynamicRealmObject. Using RealmResults. It is only possible to update fields directly on objects this way.
Linked fields or list elements cannot be updated using these methods. This gives you a new instance of the class RealmResults , containing the users with the name John or Peter. The method findAll executes the query; [RealmQuery][] includes a family of findAll methods:. Queries return a list of references to the matching objects, so you work directly with the original objects that matches your query.
RealmResults inherits from AbstractList and behaves in similar ways. For example, RealmResults are ordered, and you can access the individual objects through an index.
If a query has no matches, the returned RealmResults object will be a list of size 0 not null. If you wish to modify or delete objects in a RealmResults set, you must do so in a write transaction.
Note that you can also query relationships: read about link queries. The where method starts a RealmQuery by specifying a model. The filter criteria is specified with predicate methods, most of which have self-explanatory names e. A predicate always takes a field name as its first argument. Not all predicates can be used with all field types; consult the [RealmQuery][] API reference for details. To match a field against a list of values, use in. The in predicate is applicable to strings, binary data, and numeric fields including dates.
All four string predicates have an optional third argument to control case sensitivity: Case. The default is Case. The predicate like performs glob-style wildcard matching. The matching pattern consists of characters and one or more wildcards:.
For example, consider a Realm with four objects with a field called name which has the values William, Bill, Jill, and Trillian. The predicate like "name", "? Binary data, strings, and lists of RealmObject s RealmList may be empty, i. You can check for emptiness with:.
If a field is not required, the value can have the value null recall that fields which are RealmObject s can never be required, and the value can be null. You can check for null with:. Conditions are implicitly joined with logical and. Logical or joins must be applied explicitly using or. You can also group conditions using beginGroup and endGroup to specify order of evaluation:. Negate conditions with not. You can define how the results should be sorted when doing the query with the sort method.
Sorts are ascending by default; to change that, use Sort. It is possible to sort using multiple fields simultaneously. This is often done out of necessity to avoid reading too much from disk, or pulling too many results into memory at once.
Since queries in Realm are lazy, performing this sort of paginating is normally not needed when working with a local Realm file as Realm will only load objects from the results of the query once they are explicitly accessed.
When using Query-based Realms , data will be fetched from the server when queried for. In this case it can make sense to limit the number of results as it directly impact how much data is transfered from the server. In this case, creating a limited query result will reduce the complexity of code needed to create such a screen.
In those cases, query results can be limited by applying the limit keyword to the query. Limited query results are auto-updated like any other query results. This means that if 10 elements are returned when the query first returns, these 10 objects can be replaced or removed as the underlying data set changes. When using fine-grained notifications , objects that stops being part of the RealmResults will be reported as deleted.
This does not necessarily mean that they are deleted from the underlying Realm, just that they are no longer part of the query result. The keywords distinct , sort and limit will be applied in the order they are specified. Depending on the data set this can make a difference to the query result. Generally, limit should be applied last. Offsetting limited query results is not supported yet. This feature is being tracked in here.
To return only unique values, use the distinct predicate. For example, to find out how many different names you have in your Realm:. You can only call distinct on integer and string fields; other field types will throw an exception. As with sorting, you can specify multiple fields. You can also chain queries on child objects as well.
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Clear your character's mailbox and auctions. If your character is currently the leader of a guild or Arena team, you must transfer the leadership to another member, or you can disband your guild or team.
Guild leaders and Arena team leaders are not transferable. Click "Character transfer," then click the "Paid Character Transfer" button and follow the on-screen directions.
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