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.\" ========================================================================
.\"
.IX Title "KiokuDB::Util 3pm"
.TH KiokuDB::Util 3pm "2010-12-19" "perl v5.12.4" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
KiokuDB::Util \- Utility functions for working with KiokuDB
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    use KiokuDB::Util qw(set weak_set);
\&
\&    my $set = set(@objects); # create a transient set
\&
\&    my $weak = weak_set(@objects); # to avoid circular refs
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This module provides various helper functions for working with KiokuDB.
.SH "EXPORTS"
.IX Header "EXPORTS"
.ie n .IP "dsn_to_backend $dsn, %args" 4
.el .IP "dsn_to_backend \f(CW$dsn\fR, \f(CW%args\fR" 4
.IX Item "dsn_to_backend $dsn, %args"
Tries to parse \f(CW$dsn\fR, load the backend and invoke \f(CW\*(C`new\*(C'\fR on it.
.Sp
Used by \*(L"connect\*(R" in KiokuDB and the various command line interfaces.
.IP "set" 4
.IX Item "set"
.PD 0
.IP "weak_set" 4
.IX Item "weak_set"
.PD
Instantiate a Set::Object or Set::Object::Weak from the arguments, and
then creates a KiokuDB::Set::Transient with the result.
.ie n .IP "import_yaml $kiokudb, @files_or_dirs" 4
.el .IP "import_yaml \f(CW$kiokudb\fR, \f(CW@files_or_dirs\fR" 4
.IX Item "import_yaml $kiokudb, @files_or_dirs"
Loads \s-1YAML\s0 files with MooseX::YAML (if given a directory it will be searched
recursively for files with a \f(CW\*(C`.yml\*(C'\fR extension are) into the specified KiokuDB
directory in a single transaction.
.Sp
The \s-1YAML\s0 files can contain multiple documents, with each document treated as an
object. If the \s-1YAML\s0 file contains a single non blessed array or hash then that
structure will be dereferenced as part of the arguments to \f(CW\*(C`insert\*(C'\fR.
.Sp
Here is an example of an array of objects, and a custom tag alias to ease
authoring of the \s-1YAML\s0 file:
.Sp
.Vb 8
\&    %YAML 1.1
\&    %TAG ! !MyFoo::
\&    \-\-\-
\&    \- !User
\&      id:        foo
\&      real_name: Foo Bar
\&      email:     foo@myfoo.com
\&      password:  \*(Aq{cleartext}test123\*(Aq
.Ve
.Sp
You can use a hash to specify custom IDs:
.Sp
.Vb 4
\&    %YAML 1.1
\&    \-\-\-
\&    the_id: !Some::Class
\&        attr: moose
.Ve