Tangram::Remote(3pm) User Contributed Perl Documentation Tangram::Remote(3pm)NAME
Tangram::Remote - represent persistent objects in client space
SYNOPSIS
use Tangram;
$remote = $storage->remote( $class );
@remotes = $storage->remote( @classes );
... $remote->{$field} ...
DESCRIPTION
A Remote object is a client-side representation of an object that resides in a database. It has the same fields as a normal object of the
same class - as declared in the Schema associated to the database the Remote was obtained from. The values of the fields are not normal
Perl values, but Tangram::Exprs that will be evaluated on the database server side.
Remote objects are somewhat similar to SQL table aliases.
Note that there are no objects which are actually "Tangram::Remote" instances; the objects will be called Tangram::Expr::QueryObject et al.
perl v5.8.8 2006-03-29 Tangram::Remote(3pm)
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Tangram::Type::Dump(3pm) User Contributed Perl Documentation Tangram::Type::Dump(3pm)NAME
Tangram::Type::Dump - Handy functions for Pixie-like dumping of data
SYNOPSIS
use Tangram::Type::Dump qw(flatten unflatten UNflatten nuke);
use YAML qw(freeze thaw); # for instance
my $frozen = freeze flatten($storage, $structure);
# optional - remove circular references from flattened
# structure so that it is freed up properly.
nuke $frozen;
# save frozen somewhere...
# restore, but don't load objects straight away
my $reconstituted = unflatten($storage, thaw $frozen);
# restore, loading objects immediately
my $original = UNflatten($storage, $frozen);
# Alternative, quickly marshall a structure for saving
my $structure;
flatten($storage, $structure);
# ... do something with it ...
# restore to former glory; note that Tangram's cache will
# prevent unnecessary DB access.
unflatten($storage, $structure);
DESCRIPTION
This module contains functions for traversing data structures which are not Tangram-registered objects, and replacing all the Tangram
objects found with `Mementos'.
When a similar data structure is fed back into the reversal function, the mementos are filled with on-demand references to the real
objects.
All these functions operate in place for maximum efficiency.
FUNCTIONS
flatten($storage, $structure)
Traverses the structure $structure, and replaces all the known (ie, already inserted) Tangram objects with references to them
unflatten($storage, $structure)
Performs the logical opposite of flatten, but only insofar as a `normal' user is concerned. `Normal' users, of course, don't care that
the data structure is being loaded from the database as they use it :).
BUGS
Should this module just be an extension to Tangram::Storage ?
AUTHOR
Sam Vilain, samv@cpan.org. All rights reserved. This code is free software; you can use and/or modify it under the same terms as Perl
itself.
perl v5.8.8 2006-03-29 Tangram::Type::Dump(3pm)
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