Retrieve data from mongodb with binary type

Question

I have a site that I created using mongodb but now I want to create a new site with MySQL. I want to retrieve data from my old site (the one using mongodb). I use RoboMongo software to connect to mongodb server but I don't see my old data (*.pdf, *.doc). I think that the data is in binary, isn't it? This is my mongodb

How can I retrieve this data?

i'm not sure. I hire a guy to code this site. Which code you need to help me Markus W Mahlberg — Pham Van Son
– Pham Van Son, Commented Mar 22, 2015 at 3:58

Stennie · Accepted Answer · 2015-03-23 06:05:27Z

1

The binary data you've highlighted is stored using a convention called GridFS. Robomongo 0.8.x doesn't support decoding GridFS binary data (see: issue #255).

In order to extract the files you'll either need to:

use the command line mongofiles utility included with MongoDB. For example:
- mongofiles list to see files stored
- mongofiles get filename to get a specific file
use a different program or driver that supports GridFS

answered Mar 23, 2015 at 6:05

Stennie

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2 Comments

Pham Van Son Over a year ago

thanks for your answer.... can you give me code in linux to decoding GridFS binary data?

Stennie Over a year ago

@PhamVanSon You should be able to use the mongofiles utility to extract the files. It's included as part of the full MongoDB install, or in a separate package that just should be called mongodb-org-tools for recent versions of MongoDB.

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