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我正在尝试将 Realm 从版本 0 迁移到版本 1。我的 POJO 如下:
@Parcel(implementations = {OrganizerRealmProxy.class},
value = Parcel.Serialization.BEAN,
analyze = {Organizer.class})
public class Organizer extends RealmObject {
@PrimaryKey
private long Id;
private String email;
private String displayName;
private Boolean self;
...
}
在我正在执行的迁移方法中:
RealmObjectSchema organizerSchema = schema.create("Organizer")
.addPrimaryKey("Id")
.addField("email", String.class)
.addField("displayName", String.class)
.addField("self", Boolean.class);
但是我遇到了异常:
Caused by: java.lang.IllegalArgumentException: Field name doesn't exist on object 'Organizer': Id
at io.realm.RealmObjectSchema.checkFieldExists(RealmObjectSchema.java:500)
at io.realm.RealmObjectSchema.addPrimaryKey(RealmObjectSchema.java:297)
at org.granitebaysda.bradapp.utils.RealmMigration.migrate(RealmMigration.java:20)
at io.realm.BaseRealm$2.onResult(BaseRealm.java:578)
at io.realm.RealmCache.invokeWithGlobalRefCount(RealmCache.java:242)
at io.realm.BaseRealm.migrateRealm(BaseRealm.java:565)
at io.realm.Realm.migrateRealm(Realm.java:1062)
at io.realm.Realm.migrateRealm(Realm.java:1051)
at io.realm.Realm.createInstance(Realm.java:231)
at io.realm.RealmCache.createRealmOrGetFromCache(RealmCache.java:114)
at io.realm.Realm.getInstance(Realm.java:191)
at org.granitebaysda.bradapp.MainActivity.onStart(MainActivity.java:114)at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1171)
at android.app.Activity.performStart(Activity.java:5241)at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2157)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515)
Realm 版本为0.87.2
使用 addField("id", String.class, FieldAttribute.PRIMARY_KEY, FieldAttribute.REQUIRED)
而不是 addPrimaryKey
后,我开始遇到另一个异常:
io.realm.exceptions.RealmMigrationNeededException: Field 'id' does
support null values in the existing Realm file. Remove @Required or
@PrimaryKey from field 'id' or migrate using
io.realm.internal.Table.convertColumnToNotNullable()
我的完整迁移类代码如下所示:
public class RealmMigration implements io.realm.RealmMigration {
@Override
public void migrate(DynamicRealm dynamicRealm, long oldVersion, long newVersion) {
// DynamicRealm exposes an editable schema
RealmSchema schema = dynamicRealm.getSchema();
if (oldVersion == 0) {
RealmObjectSchema organizerSchema = schema.create("Organizer")
.addField("Id", long.class, FieldAttribute.PRIMARY_KEY)
.addField("email", String.class, FieldAttribute.INDEXED)
.addField("displayName", String.class)
.addField("self", Boolean.class);
RealmObjectSchema startSchema = schema.create("Start")
.addField("Id", long.class, FieldAttribute.PRIMARY_KEY)
.addField("dateTime", String.class)
.addField("timeZone", String.class)
.addField("date", String.class);
RealmObjectSchema endSchema = schema.create("End")
.addField("Id", long.class, FieldAttribute.PRIMARY_KEY)
.addField("dateTime", String.class)
.addField("timeZone", String.class)
.addField("date", String.class);
RealmObjectSchema eventCreatorSchema = schema.create("EventCreator")
.addField("email", String.class, FieldAttribute.PRIMARY_KEY)
.addField("displayName", String.class);
RealmObjectSchema AttendeeSchema = schema.create("Attendee")
.addField("id", String.class, FieldAttribute.PRIMARY_KEY)
.addField("email", String.class)
.addField("displayName", String.class)
.addField("organizer", Boolean.class)
.addField("self", Boolean.class)
.addField("responseStatus", String.class);
RealmObjectSchema originalStartTimeSchema = schema.create("OriginalStartTime")
.addField("id", String.class, FieldAttribute.PRIMARY_KEY)
.addField("dateTime", String.class);
RealmObjectSchema recurrenceSchema = schema.create("RecurrenceString")
.addField("Id", long.class, FieldAttribute.PRIMARY_KEY)
.addField("recurrence", String.class);
RealmObjectSchema EventRecurrenceDetailSchema = schema.create("EventRecurrenceDetail")
.addField("id", String.class, FieldAttribute.PRIMARY_KEY)
.addField("freq", int.class)
.addField("byDay", int.class)
.addField("byDayNum", int.class)
.addField("until", String.class)
.addField("interval", String.class);
schema.create("Item")
.addField("id", String.class, FieldAttribute.PRIMARY_KEY, FieldAttribute.REQUIRED)
.addField("kind", String.class)
.addField("etag", String.class)
.addField("status", String.class)
.addField("htmlLink", String.class)
.addField("created", String.class)
.addField("updated", String.class)
.addField("summary", String.class)
.addField("description", String.class)
.addField("location", String.class)
.addRealmObjectField("creator", eventCreatorSchema)
.addRealmObjectField("organizer", organizerSchema)
.addRealmObjectField("start", startSchema)
.addRealmObjectField("end", endSchema)
.addField("transparency", String.class)
.addField("iCalUID", String.class)
.addField("sequence", Integer.class)
.addRealmListField("attendees", AttendeeSchema)
.addField("recurringEventId", String.class)
.addRealmObjectField("originalStartTime", originalStartTimeSchema)
.addRealmListField("recurrence", recurrenceSchema)
.addRealmObjectField("recurrenceDetail", EventRecurrenceDetailSchema);
oldVersion++;
}
}
}
组织者.java
public class Organizer extends RealmObject {
@PrimaryKey
private long Id;
@Index
private String email;
private String displayName;
private Boolean self;
...
}
Start.java
public class Start extends RealmObject {
@PrimaryKey
private long Id;
private String dateTime;
private String timeZone;
private String date;
public Start() {
}
}
End.java
public class End extends RealmObject {
@PrimaryKey
private long Id;
@SerializedName("dateTime")
@Expose
private String dateTime;
@SerializedName("timeZone")
@Expose
private String timeZone;
@SerializedName("date")
@Expose
private String date;
public End() {
}
}
EventCreator.java
public class EventCreator extends RealmObject {
@PrimaryKey
private String email;
private String displayName;
public EventCreator() {
}
}
Attendee.java
public class Attendee extends RealmObject {
@PrimaryKey
private String id;
private String email;
private String displayName;
private Boolean organizer;
private Boolean self;
private String responseStatus;
public Attendee() {
}
}
OriginalStartTime.java
public class OriginalStartTime extends RealmObject {
@PrimaryKey
private String id;
private String dateTime;
public OriginalStartTime() {
}
}
ReccurenceString.java
public class RecurrenceString extends RealmObject {
@PrimaryKey
private long Id;
private String recurrence;
public RecurrenceString() {
}
}
EventRecurrenceDetail.java
public class EventRecurrenceDetail extends RealmObject {
@PrimaryKey
private String id;
private int freq;
private int byDay;
private int byDayNum;
private String until;
private int interval;
public EventRecurrenceDetail() {
}
}
Item.java
public class Item extends RealmObject {
@PrimaryKey
private String id;
private String kind;
private String etag;
private String status;
private String htmlLink;
private String created;
private String updated;
private String summary;
private String description;
private String location;
private EventCreator creator;
private Organizer organizer;
private Start start;
private End end;
private String transparency;
private String iCalUID;
private Integer sequence;
private RealmList<Attendee> attendees = new RealmList<>();
private String recurringEventId;
private OriginalStartTime originalStartTime;
private RealmList<RecurrenceString> recurrence = new RealmList<>();
private EventRecurrenceDetail recurrenceDetail;
public EventRecurrenceDetail getRecurrenceDetail() {
return recurrenceDetail;
}
public Item() {
}
}
最佳答案
试试这个:
RealmObjectSchema organizerSchema = schema.create("Organizer")
.addField("Id", long.class, FieldAttribute.PRIMARY_KEY)
.addField("email", String.class)
.addField("displayName", String.class)
.addField("self", Boolean.class);
addPrimaryKey
必须在现有字段上调用。
---- 2016年1月22日更新删除特定版本的Realm文件----
DynamicRealm
旨在打开 Realm 文件而不检查架构。
如果你想删除版本0的Realm文件,你可以这样做:
File file = new File(realmConfig.getPath());
if (file.exist()) {
DynamicRealm dynamicRealm = DynamicRealm.getInstance(realmConfig);
long version = dynamicRealm.getVersion();
dynamicRealm.close();
if (version == 0) {
Realm.deleteRealm(realmConfig);
}
}
关于realm - 非法参数异常 : Field name doesn't exist on object while doing migration,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34886660/
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