我有一個setChatsList()
方法,它有一個龐大的代碼:正確insert()和createObject()之間有什麼區別?
public void setChatsList(final ChatsModel chatsModel) {
Realm realm = Realm.getDefaultInstance();
realm.executeTransaction(new Realm.Transaction() {
@Override
public void execute(@NonNull Realm realm) {
ChatsModel realmChats = realm.createObject(ChatsModel.class);
Response realmResponse = realm.createObject(Response.class);
Item realmItem = realm.createObject(Item.class);
Message realmMessage = realm.createObject(Message.class);
Attachment realmAttachment = realm.createObject(Attachment.class);
Video realmVideo = realm.createObject(Video.class);
Response response = chatsModel.getResponse();
RealmList<Item> items = new RealmList<>();
Integer itemCount = response.getCount();
RealmList<Item> itemList = response.getItems();
if (itemList != null) {
for (Item item : itemList) {
Message message = item.getMessage();
realmMessage.setId(message.getId());
realmMessage.setDate(message.getDate());
realmMessage.setOut(message.getOut());
realmMessage.setUserId(message.getUserId());
realmMessage.setReadState(message.getReadState());
realmMessage.setTitle(message.getTitle());
realmMessage.setBody(message.getBody());
realmMessage.setRandomId(message.getRandomId());
RealmList<Attachment> attachments = message.getAttachments();
RealmList<Attachment> attachmentList = new RealmList<>();
if (attachments != null) {
for (Attachment attachment : attachments) {
String type = attachment.getType();
Video video = attachment.getVideo();
realmVideo.setAccessKey(video.getAccessKey());
realmVideo.setCanAdd(video.getCanAdd());
realmVideo.setCanEdit(video.getCanEdit());
realmVideo.setComments(video.getComments());
realmVideo.setDate(video.getDate());
realmVideo.setDescription(video.getDescription());
realmVideo.setDuration(video.getDuration());
realmVideo.setId(video.getId());
realmVideo.setOwnerId(video.getOwnerId());
realmVideo.setPhoto130(video.getPhoto130());
realmVideo.setPhoto320(video.getPhoto320());
realmVideo.setPhoto640(video.getPhoto640());
realmVideo.setPlatform(video.getPlatform());
realmVideo.setTitle(video.getTitle());
realmVideo.setViews(video.getViews());
realmAttachment.setType(type);
realmAttachment.setVideo(realmVideo);
attachmentList.add(realmAttachment);
}
realmMessage.setAttachments(attachmentList);
}
realmResponse.getItems().add(item);
}
}
realmResponse.setCount(itemCount);
realmChats.setResponse(realmResponse);
}
});
}
作品!
只需在有關方法insert()
的官方文檔中閱讀,也可以存儲在數據庫中。因此,我改寫了setChatsList()
方法:
public void setChatsList(final ChatsModel chatsModel) {
Realm realm = Realm.getDefaultInstance();
realm.executeTransaction(new Realm.Transaction() {
@Override
public void execute(@NonNull Realm realm) {
realm.insert(chatsModel);
}
});
}
讓我吃驚,這太細的工作和代碼是少了!
但我敢肯定,並非一切都那麼順利,我認爲在某個地方有一個捕獲。
問:insert()
和createObject()
有什麼區別?
'insert'會自動插入整個對象層次結構,所以所有對象都必須是Realm對象。 'createObject()'單獨創建每個對象,給予更大的靈活性。如果你可以使用'insert'或'insertOrUpdate',那會更好。 –