Synopsis

require('mongo')

-- Create a connection object
local db = assert(mongo.Connection.New())

-- connect to the server on localhost
assert(db:connect('localhost'))

-- create a GridFS handle
local gridfs = assert(mongo.GridFS.New(db, 'test'))

-- store a file on the server
local gridfile = assert(gridfs:store_file('/path/to/file'))

-- print details
print(gridfile:num_chunks())
print(gridfile:chunk_size())
print(gridfile:md5())
print(gridfile:metadata())
print(gridfile:upload_date())
print(#gridfile) -- synonym for gridfile:content_length()

-- examine file chunks
local chunk = assert(gridfile:chunk(0))
print(#chunk) -- synonym for chunk:len()
print(chunk:data())

-- write file data
assert(gridfile:write('/path/to/newfile'))

-- list files on the DB
local q = gridfs:list()
for gf in q:results() do
    print(gf:field('filename'))
end

Methods

gridfs, err = mongo.GridFS.New(connection, dbname[, prefix])

gridfile, err = gridfs:find_file(filename)

cursor = gridfs:list()

ok, err = gridfs:remove_file(filename)

gridfile, err = gridfs:store_file(filename[, remote_file[, content_type]])

chunk, err = gridfile:chunk(chunk_num)

chunk_size = gridfile:chunk_size()

content_length = gridfile:content_length()

bool = gridfile:exists()

filename_str = gridfile:filename()

md5_str = gridfile:md5()

metadata_table = gridfile:metadata()

num_chunks = gridfile:num_chunks()

date = gridfile:upload_date()

success,err = gridfile:write(filename)

str = chunk:data()

length = chunk:len()