NAME

Mango::Cursor - MongoDB cursor

SYNOPSIS

  use Mango::Cursor;
  my $cursor = Mango::Cursor->new(collection => $collection);
  my $docs   = $cursor->all;

Mango::Cursor is a container for MongoDB cursors used by Mango::Collection.

Mango::Cursor implements the following attributes.

  my $size = $cursor->batch_size;
  $cursor  = $cursor->batch_size(10);

Number of documents to fetch in one batch, defaults to 0.

  my $collection = $cursor->collection;
  $cursor        = $cursor->collection(Mango::Collection->new);

Mango::Collection object this cursor belongs to.

  my $id  = $cursor->id;
  $cursor = $cursor->id(123456);

Cursor id.

  my $limit = $cursor->limit;
  $cursor   = $cursor->limit(10);

Limit the number of documents, defaults to 0.

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

  $cursor = $cursor->add_batch($docs);

Add batch of documents to cursor.

  my $docs = $cursor->all;

Fetch all documents at once. You can also append a callback to perform operation non-blocking.

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

  my $doc = $cursor->next;

Fetch next document. You can also append a callback to perform operation non-blocking.

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

  $cursor->rewind;

Rewind cursor and kill it on the server. You can also append a callback to perform operation non-blocking.

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

  my $num = $cursor->num_to_return;

Number of results to return with next "QUERY" or "GET_MORE" operation based on "batch_size" and "limit".