Save files - MongoDB

jc-justnow · **Joined:** Tue Jan 27, 2015 11:49 am **Posts:** 1

Hello!

I'm using MongoDB with Hibernate OGM 4.1.1.
I'm trying to map an entity with a property containing binary data (a file).
I'm having problems with this property "image". I don't know, this is not mapped.
What am I doing wrong?
How should save this kind of data?

Code:

@Entity
@Table(name="photos")
public class Photo {

   @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Type(type = "objectid")
   private String id;
   private String user;
   private long creation_time;
   private String title;
   @ElementCollection
   private List<String> tags;
   private byte[] image;

Thanks for all.

DavideD · **Joined:** Fri Sep 09, 2011 3:18 am **Posts:** 295

Hi,
could you give us some more information, please?

What's exactly is not working? Do you have an exception?

emmanuel · **Posted:** Wed Jan 28, 2015 6:34 am

@Davide, let's add a test in our test suite for byte[] anyways. I'm not certain we have a test for these.

Gunnar · **Joined:** Sat Jan 24, 2009 12:46 pm **Posts:** 388

Hi,

the byte[] is stored using MongoDB's BinData type (see https://github.com/hibernate/hibernate-ogm/blob/master/core/src/test/java/org/hibernate/ogm/backendtck/type/Bookmark.java#L201 for an example in our test suite). I thought that'd it require @Lob to be given, but it works for me with and without it. It'd be good to have a small test case demonstrating your issue (what kind of exception you get etc.)

Hth,

--Gunnar

emmanuel · **Posted:** Wed Jan 28, 2015 7:26 am

Ahah my bad, so we have a test :)

DavideD · **Joined:** Fri Sep 09, 2011 3:18 am **Posts:** 295

We have a test in place for byte[] so at the moment I don't know how to reproduce the error.
If he can give us more information about the error we might be able to solve the issue.

At the moment byte[] are store as Binary data in MongoDB, using the mongo CLI it should look something like:

Code:

"image" : BinData(0,"MTIzNDU=")