NAME

Mango::Database - MongoDB database

SYNOPSIS

  use Mango::Database;

  my $db = Mango::Database->new(mango => $mango);
  my $collection = $db->collection('foo');
  my $gridfs     = $db->gridfs;

DESCRIPTION

Mango::Database is a container for MongoDB databases used by Mango.

ATTRIBUTES

Mango::Database implements the following attributes.

mango

  my $mango = $db->mango;
  $db       = $db->mango(Mango->new);

Mango object this database belongs to. Note that this reference is usually weakened, so the Mango object needs to be referenced elsewhere as well.

METHODS

Mango::Database inherits all methods from Mojo::Base and implements the following new ones.

build_write_concern

  my $concern = $db->build_write_concern;

Build write concern based on l</"mango"> settings.

collection

  my $collection = $db->collection('foo');

Build Mango::Collection object for collection.

collection_names

  my $names = $db->collection_names;

Names of all collections in this database. You can filter the results by using the same arguments as for "list_collections". You can also append a callback to perform operation non-blocking.

  $db->collection_names(sub {
    my ($db, $err, $names) = @_;
    ...
  });
  Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

command

  my $doc = $db->command(bson_doc(text => 'foo.bar', search => 'test'));
  my $doc = $db->command(bson_doc(getLastError => 1, w => 2));
  my $doc = $db->command('getLastError', w => 2);

Run command against database. You can also append a callback to run command non-blocking.

  $db->command(('getLastError', w => 2) => sub {
    my ($db, $err, $doc) = @_;
    ...
  });
  Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

dereference

  my $doc = $db->dereference($dbref);

Resolve database reference. You can also append a callback to perform operation non-blocking.

  $db->dereference($dbref => sub {
    my ($db, $err, $doc) = @_;
    ...
  });
  Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

list_collections

  # return a cursor for all collections
  my $cursor = $db->list_collections;
  # only collections which name matchs a regex
  my $cursor = $db->list_collections(filter => { name => qr{^prefix} });
  # only capped collections
  my $cursor = $db->list_collections(filter => { 'options.capped' => 1 });
  # only the first 10 collections
  my $cursor = $db->list_collections(cursor => { batchSize => 10 });

Returns a Mango::Cursor of all collections in this database. Each collection is represented by a document containing at least the keys "name" and "options". You can also append a callback to perform operation non-blocking.

  $db->list_collections(sub {
    my ($db, $err, $cursor) = @_;
    ...
  });
  Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

stats

  my $stats = $db->stats;

Get database statistics. You can also append a callback to perform operation non-blocking.

  $db->stats(sub {
    my ($db, $err, $stats) = @_;
    ...
  });
  Mojo::IOLoop->start unless Mojo::IOLoop->is_running;