rmongodb (version 1.8.0)

mongo.gridfile.get.metadata: Get the metadata of a mongo.gridfile

Description

Get the metadata of a mongo.gridfile. Some applications may store metadata pertaining to a GridFS file in the "metadata" field of the descriptor. (See mongo.gridfile.get.descriptor(). This function retrieves that field as a mongo.bson object.

Usage

mongo.gridfile.get.metadata(gridfile)

Arguments

gridfile

A (mongo.gridfile) object.

Value

(mongo.bson) The metadata of gridfile if present; otherwise, NULL.

See Also

mongo.gridfs, mongo.gridfs.find, mongo.gridfile, mongo.gridfile.get.descriptor, mongo.gridfile.get.filename, mongo.gridfile.get.length, mongo.gridfile.get.chunk.size, mongo.gridfile.get.chunk.count, mongo.gridfile.get.content.type, mongo.gridfile.get.upload.date, mongo.gridfile.get.md5, mongo.gridfile.get.chunk, mongo.gridfile.get.chunks, mongo.gridfile.read, mongo.gridfile.seek, mongo.gridfile.pipe.

Examples

mongo <- mongo.create()
if (mongo.is.connected(mongo)) {
    gridfs <- mongo.gridfs.create(mongo, "grid")
    mongo.gridfs.store.file(gridfs, "tests/test.R", "test.R")

    gf <- mongo.gridfs.find(gridfs, "test.R")
    if( !is.null(gf) ){
      print(mongo.gridfile.get.metadata(gf))

      mongo.gridfile.destroy(gf)
    }
    mongo.gridfs.destroy(gridfs)
}