Java driver: gridfs without filename

[guillou...@gmail.com]

Hi all,

I am trying to download a file from GridFS using MongoDB Java Driver 3.4.

I know the ID of the file, so I simply do:

  GridFSBucket gridFSFilesBucket = GridFSBuckets.create(db);

  GridFSFile file = gridFSFilesBucket.find(eq("_id", fileId)).first();

But it throws the exception:

Exception in thread "main" org.bson.BsonInvalidOperationException: Document does not contain key filename

at org.bson.BsonDocument.throwIfKeyAbsent(BsonDocument.java:844)

at org.bson.BsonDocument.getString(BsonDocument.java:233)

at com.mongodb.client.gridfs.codecs.GridFSFileCodec.decode(GridFSFileCodec.java:68)

at com.mongodb.client.gridfs.codecs.GridFSFileCodec.decode(GridFSFileCodec.java:48)

at com.mongodb.operation.CommandResultArrayCodec.decode(CommandResultArrayCodec.java:52)

Which is true, as my file does not have a filename, which from the documentation is totally valid: the filename is optional https://docs.mongodb.com/manual/core/gridfs/ 

I encounter the same issue if I try to use downloadToStream.

Is it a bug in the API ?

Cheers,

[Kevin Adistambha]

Hi

my file does not have a filename, which from the documentation is totally valid: the filename is optional https://docs.mongodb.com/manual/core/gridfs/
I encounter the same issue if I try to use downloadToStream.

Apparently you are correct. I have submitted JAVA-2546 to seek clarification on this issue. Thanks for bringing this to our attention. Please feel free to watch/upvote/comment on the ticket.

Best regards,
Kevin

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