io.realm.FieldAttribute Java Examples

private static void changeFieldType(RealmObjectSchema objectSchema, String fieldName,
                             Class newType, @Nullable FieldAttribute attribute,
                             Action3<DynamicRealmObject, String, String> transformation) {
    String tempFieldName = fieldName + "_temp";
    if (attribute != null) {
        if (attribute == FieldAttribute.PRIMARY_KEY && objectSchema.hasPrimaryKey()) {
            // remove existing primary key
            objectSchema.removePrimaryKey();
        }
        objectSchema.addField(tempFieldName, newType, attribute);
    } else {
        objectSchema.addField(tempFieldName, newType);
    }
    objectSchema
            .transform(obj -> {
                transformation.call(obj, fieldName, tempFieldName);
            })
            .removeField(fieldName)
            .renameField(tempFieldName, fieldName);
}
 

@Override
public void migrate(DynamicRealm realm, long oldVersion, long newVersion)
{
    RealmSchema schema = realm.getSchema();
    if (oldVersion == 4)
    {
        RealmObjectSchema realmTicker = schema.get("RealmTokenTicker");
        if (!realmTicker.hasField("currencySymbol")) realmTicker.addField("currencySymbol", String.class);
        oldVersion++;
    }
    //Note: these version updates drop through; eg if oldVersion was 4, then the above code AND this code will execute
    if (oldVersion == 5)
    {
        RealmObjectSchema realmToken = schema.get("RealmToken");
        if (!realmToken.hasField("lastTxTime")) realmToken.addField("lastTxTime", long.class); //add the last transaction update time, used to check tokenscript cached result validity
        oldVersion++;
    }

    //Version 6
    if (oldVersion == 6)
    {
        schema.create("RealmCertificateData")
                .addField("instanceKey", String.class, FieldAttribute.PRIMARY_KEY)
                .addField("result", String.class)
                .addField("subject", String.class)
                .addField("keyName", String.class)
                .addField("keyType", String.class)
                .addField("issuer", String.class)
                .addField("certificateName", String.class)
                .addField("type", int.class);
        oldVersion++;
    }
}
 

@Override
    public void migrate(DynamicRealm realm, long oldVersion, long newVersion) {
        XLog.info("migrate oldVersion:" + oldVersion + ", newVersion:" + newVersion);
        RealmSchema schema = realm.getSchema();
        while (oldVersion< newVersion) {
            if (oldVersion == 9) {
                schema.create("PortalDataRealmObject")
                        .addField("id", String.class, FieldAttribute.PRIMARY_KEY)
                        .addField("name", String.class)
                        .addField("alias", String.class)
                        .addField("description", String.class)
                        .addField("portalCategory", String.class)
                        .addField("firstPage", String.class)
                        .addField("creatorPerson", String.class)
                        .addField("lastUpdateTime", String.class)
                        .addField("lastUpdatePerson", String.class)
                        .addField("createTime", String.class)
                        .addField("updateTime", String.class)
                        .addField("enable", Boolean.class);
                schema.create("NativeAppDataRealmObject")
                        .addField("id", String.class, FieldAttribute.PRIMARY_KEY)
                        .addField("key", String.class)
                        .addField("name", String.class)
                        .addField("enable", Boolean.class);
                oldVersion++;
            }
            if (oldVersion == 10) {
                oldVersion++;
            }
            if (oldVersion == 11) {
//                schema.create("IMUserEntryRealmObject")
//                        .addField("_id", String.class, FieldAttribute.PRIMARY_KEY)
//                        .addField("username", String.class)
//                        .addField("appKey", String.class);
//                schema.create("ImFriendEntryRealmObject")
//                        .addField("_id", String.class, FieldAttribute.PRIMARY_KEY)
//                        .addField("uid", Long.class)
//                        .addField("username", String.class)
//                        .addField("appKey", String.class)
//                        .addField("avatar", String.class)
//                        .addField("displayName", String.class)
//                        .addField("letter", String.class)
//                        .addField("nickName", String.class)
//                        .addField("noteName", String.class)
//                        .addField("user", IMUserEntryRealmObject.class);
//                oldVersion++;
            }
        }

    }
 

@Override
public void migrate(DynamicRealm realm, long oldVersion, long newVersion) {
    RealmSchema schema = realm.getSchema();
    Crashlytics.log(Log.INFO, TAG, "MIGRATING DATABASE from v" + oldVersion + " to v" + newVersion);

    if (oldVersion == 0) {
        if (schema.get("Post").isNullable("slug")) {
            // get rid of null-valued slugs, if any exist
            RealmResults<DynamicRealmObject> postsWithNullSlug = realm
                    .where(Post.class.getSimpleName())
                    .isNull("slug")
                    .findAll();
            Crashlytics.log(Log.DEBUG, TAG, "CONVERTING " + postsWithNullSlug.size() + " SLUGS FROM NULL TO \"\"");
            for (DynamicRealmObject obj : postsWithNullSlug) {
                obj.setString("slug", "");
            }
            // finally, make the field required
            schema.get("Post").setNullable("slug", false);
        }

        schema.get("Post")
                .setNullable("html", true)
                .setNullable("image", true)
                .setNullable("createdAt", true)
                .setNullable("publishedAt", true)
                .setNullable("metaTitle", true)
                .setNullable("metaDescription", true);
        schema.get("User")
                .addIndex("id")
                .setNullable("image", true)
                .setNullable("bio", true);
        schema.get("Tag")
                .setNullable("slug", true)
                .setNullable("description", true)
                .setNullable("image", true)
                .setNullable("metaTitle", true)
                .setNullable("metaDescription", true)
                .setNullable("createdAt", true)
                .setNullable("updatedAt", true);
        schema.get("Setting")
                .addIndex("id");
        ++oldVersion;
    }

    if (oldVersion == 1) {
        // delete all etags, so the info can be fetched and stored
        // again, with role-based permissions enforced
        RealmResults<DynamicRealmObject> allEtags = realm
                .where(ETag.class.getSimpleName())
                .equalTo("type", ETag.TYPE_CURRENT_USER)
                .or()
                .equalTo("type", ETag.TYPE_ALL_POSTS)
                .findAll();
        Crashlytics.log(Log.DEBUG, TAG, "DELETING ALL ETAGS TO REFRESH DATA COMPLETELY");
        allEtags.deleteAllFromRealm();

        if (!schema.contains("Role")) {
            // create the Role table
            Crashlytics.log(Log.DEBUG, TAG, "CREATING ROLE TABLE");
            schema.create("Role")
                    .addField("id", Integer.class, FieldAttribute.PRIMARY_KEY)
                    .addField("uuid", String.class, FieldAttribute.REQUIRED)
                    .addField("name", String.class, FieldAttribute.REQUIRED)
                    .addField("description", String.class, FieldAttribute.REQUIRED);
        }

        if (!schema.get("User").hasField("roles")) {
            Crashlytics.log(Log.DEBUG, TAG, "ADDING ROLES FIELD TO USER TABLE");
            schema.get("User").addRealmListField("roles", schema.get("Role"));
        }
        ++oldVersion;
    }

    if (oldVersion == 2) {
        if (!schema.get("Post").hasField("conflictState")) {
            Crashlytics.log(Log.DEBUG, TAG, "ADDING CONFLICT STATE FIELD TO POST TABLE");
            schema.get("Post").addField("conflictState", String.class, FieldAttribute.REQUIRED);
        }
        ++oldVersion;
    }

    if (oldVersion == 3) {
        // Ghost 1.0 upgrade, drop all data
        Crashlytics.log(Log.WARN, TAG, "DROPPING ALL DATA");
        final SpectreApplication app = SpectreApplication.getInstance();
        app.setOldRealmSchemaVersion(3);

        // clear logged in state
        AppState.getInstance(app).setBoolean(AppState.Key.LOGGED_IN, false);
        UserPrefs.getInstance(app).clear(UserPrefs.Key.EMAIL);
        UserPrefs.getInstance(app).clear(UserPrefs.Key.PASSWORD);
        UserPrefs.getInstance(app).clear(UserPrefs.Key.PERMALINK_FORMAT);

        ++oldVersion;
    }

    // STARTING FROM V4, THE REALM THAT USED TO STORE THE BLOG DATA NOW
    // ONLY STORES THE *METADATA* FOR ALL CONNECTED BLOGS
}