mongo.gridfile: The mongo.gridfile class

In jonkatz2/rmongodb: R-MongoDB driver

Description

Objects of class "mongo.gridfile" are used to access gridfiles on a MongoDB server. They are created by mongo.gridfs.find().

Details

mongo.gridfile objects have "mongo.gridfile" as their class and contain an externally managed pointer to the actual data used to manage operations on the gridfile. This pointer is stored in the "mongo.gridfile" attribute of the object. The object also has a "mongo.gridfs" attribute holding a pointer to the mongo.gridfs object used in creation to prevent garbage collection on the mongo.gridfs object while the mongo.gridfile is still active.

See Also

mongo.gridfs,
mongo.gridfs.find,
mongo.gridfile.get.filename,
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.metadata,
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)){
        gf
        mongo.gridfile.destroy(gf)
    }
    mongo.gridfs.destroy(gridfs)
}

jonkatz2/rmongodb documentation built on May 19, 2019, 7:30 p.m.