DBIx::Class::InflateColumn::FS(3)

NAME
DBIx::Class::InflateColumn::FS - Inflate/deflate columns to Path::Class::File objects

SYNOPSIS
  __PACKAGE__->load_components(qw/InflateColumn::FS Core/);
  __PACKAGE__->add_columns(
      id => {
          data_type         => 'INT',
          is_auto_increment => 1,
      },
      file => {
          data_type => 'TEXT',
          is_fs_column => 1,
          fs_column_path => '/var/lib/myapp/myfiles',
      },
      file_2 => {
          data_type => 'TEXT',
          is_fs_column => 1,
          fs_column_path => '/var/lib/myapp/myfiles',
          fs_new_on_update => 1
      },
  );
  __PACKAGE__->set_primary_key('id');

  # in application code
  $rs->create({ file => $file_handle });

  $row = $rs->find({ id => $id });
  my $fh = $row->file->open('r');

DESCRIPTION
Provides inflation to a Path::Class::File object allowing file system storage of BLOBS.

The storage path is specified with "fs_column_path". Each file receives a unique name, so the storage for all FS columns can share the same path.

Within the path specified by "fs_column_path", files are stored in sub-directories based on the first 2 characters of the unique file names. Up to 256 sub-directories will be created, as needed. Override "_fs_column_dirs" in a derived class to change this behavior.

"fs_new_on_update" will create a new file name if the file has been updated.

METHODS

  inflate_result

  register_column

  fs_file_name
Provides the file naming algorithm. Override this method to change it.

This method is called with two parameters: The name of the column and the "column_info" object.

  _fs_column_dirs
Returns the sub-directory components for a given file name. Override it to provide a deeper directory tree or change the algorithm.

  copy
Copies a row object, duplicating the files backing fs columns.

  delete
Deletes the associated file system storage when a row is deleted.

  set_column
Deletes file storage when an fs_column is set to undef.

  set_inflated_column
Re-inflates after setting an fs_column.

  _inflate_fs_column
Inflates a file column to a Path::Class::File object.

  _deflate_fs_column
Deflates a file column to its storage path name, relative to "fs_column_path". In the database, a file column is just a place holder for inflation/deflation. The actual file lives in the file system.

  table
Overridden to provide a hook for specifying the resultset_class. If you provide your own resultset_class, inherit from InflateColumn::FS::ResultSet.

SUPPORT
Community support can be found via:

  Mailing list: http://lists.scsys.co.uk/mailman/listinfo/dbix-class/

  IRC: irc.perl.org#dbix-class

The author is "semifor" on IRC and a member of the mailing list.

AUTHOR
semifor: Marc Mims <marc@questright.com>

CONTRIBUTORS
mst: Matt S. Trout <mst@shadowcatsystems.co.uk>

mo: Moritz Onken <onken@netcubed.de>

norbi: Norbert Buchmuller <norbi@nix.hu>

LICENSE
You may distribute this code under the same terms as Perl itself.