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DBIx::Class::Schema::LUserrContributed Perl DocuDBIx::Class::Schema::Loader(3)

       DBIx::Class::Schema::Loader - Create a DBIx::Class::Schema based	on a

	   ### use this	module to generate a set of class files

	   # in	a script
	   use DBIx::Class::Schema::Loader qw/ make_schema_at /;
	       { debug => 1,
		 dump_directory	=> './lib',
	       [ 'dbi:Pg:dbname="foo"',	'myuser', 'mypassword',
		  { loader_class => 'MyLoader' } # optionally

	   # from the command line or a	shell script with dbicdump (distributed
	   # with this module).	 Do `perldoc dbicdump` for usage.
	   dbicdump -o dump_directory=./lib \
		    -o components='["InflateColumn::DateTime"]'	\
		    -o debug=1 \
		    My::Schema \
		    'dbi:Pg:dbname=foo'	\
		    myuser \

	   ### or generate and load classes at runtime
	   # note: this	technique is not recommended
	   # for use in	production code

	   package My::Schema;
	   use base qw/DBIx::Class::Schema::Loader/;

	       constraint	       => '^foo.*',
	       # debug		       => 1,

	   ####	in application code elsewhere:

	   use My::Schema;

	   my $schema1 = My::Schema->connect( $dsn, $user, $password, $attrs);
	   # -or-
	   my $schema1 = "My::Schema"; $schema1->connection(as above);

       DBIx::Class::Schema::Loader automates the definition of a
       DBIx::Class::Schema by scanning database	table definitions and setting
       up the columns, primary keys, unique constraints	and relationships.

       See dbicdump for	the "dbicdump" utility.

       DBIx::Class::Schema::Loader currently supports only the DBI storage
       type. It	has explicit support for DBD::Pg, DBD::mysql, DBD::DB2,
       DBD::Firebird, DBD::InterBase, DBD::Informix, DBD::SQLAnywhere,
       DBD::SQLite, DBD::Sybase	(for Sybase ASE	and MSSSQL), DBD::ODBC (for
       MSSQL, MSAccess,	Firebird and SQL Anywhere) DBD::ADO (for MSSQL and
       MSAccess) and DBD::Oracle.  Other DBI drivers may function to a greater
       or lesser degree	with this loader, depending on how much	of the DBI
       spec they implement, and	how standard their implementation is.

       Patches to make other DBDs work correctly welcome.

       See DBIx::Class::Schema::Loader::DBI::Writing for notes on writing your
       own vendor-specific subclass for	an unsupported DBD driver.

       This module requires DBIx::Class	0.08127	or later, and obsoletes	the
       older DBIx::Class::Loader.

       See DBIx::Class::Schema::Loader::Base for available options.

       The loader object, as class data	on your	Schema.	For methods available
       see DBIx::Class::Schema::Loader::Base and

       Argument: $loader_class

       Set the loader class to be instantiated when "connection" is called.
       If the classname	starts with "::", "DBIx::Class::Schema::Loader"	is
       prepended. Defaults to "storage_type" in	DBIx::Class::Schema (which
       must start with "::" when using DBIx::Class::Schema::Loader).

       This is mostly useful for subclassing existing loaders or in
       conjunction with	"dump_to_dir".

       Argument: \%loader_options

       Example in Synopsis above demonstrates a	few common arguments.  For
       detailed	information on all of the arguments, most of which are only
       useful in fairly	complex	scenarios, see the
       DBIx::Class::Schema::Loader::Base documentation.

       If you intend to	use "loader_options", you must call "loader_options"
       before any connection is	made, or embed the "loader_options" in the
       connection information itself as	shown below.  Setting "loader_options"
       after the connection has	already	been made is useless.

       Arguments: @args
       Return Value: $new_schema

       See "connection"	in DBIx::Class::Schema for basic usage.

       If the final argument is	a hashref, and it contains the keys
       "loader_options"	or "loader_class", those keys will be deleted, and
       their values value will be used for the loader options or class,
       respectively, just as if	set via	the "loader_options" or	"loader_class"
       methods above.

       The actual auto-loading operation (the heart of this module) will be
       invoked as soon as the connection information is	defined.

       See "clone" in DBIx::Class::Schema.

       Argument: $directory

       Calling this as a class method on either	DBIx::Class::Schema::Loader or
       any derived schema class	will cause all schemas to dump manual versions
       of themselves to	the named directory when they are loaded.  In order to
       be effective, this must be set before defining a	connection on this
       schema class or any derived object (as the loading happens as soon as
       both a connection and loader_options are	set, and only once per class).

       See "dump_directory" in DBIx::Class::Schema::Loader::Base for more
       details on the dumping mechanism.

       This can	also be	set at module import time via the import option
       "dump_to_dir:/foo/bar" to DBIx::Class::Schema::Loader, where "/foo/bar"
       is the target directory.


	   # My::Schema	isa DBIx::Class::Schema::Loader, and has connection info
	   #   hardcoded in the	class itself:
	   perl	-MDBIx::Class::Schema::Loader=dump_to_dir:/foo/bar -MMy::Schema	-e1

	   # Same, but no hard-coded connection, so we must provide one:
	   perl	-MDBIx::Class::Schema::Loader=dump_to_dir:/foo/bar -MMy::Schema	-e 'My::Schema->connection("dbi:Pg:dbname=foo",	...)'

	   # Or	as a class method, as long as you get it done *before* defining	a
	   #  connection on this schema	class or any derived object:
	   use My::Schema;

	   # Or	as a class method on the DBIx::Class::Schema::Loader itself, which affects all
	   #   derived schemas
	   use My::Schema;
	   use My::OtherSchema;

	   # Another alternative to the	above:
	   use DBIx::Class::Schema::Loader qw| dump_to_dir:/foo/bar |;
	   use My::Schema;
	   use My::OtherSchema;

       Arguments: $schema_class_name, \%loader_options,	\@connect_info
       Return Value: $schema_class_name

       This function creates a DBIx::Class schema from an existing RDBMS
       schema.	With the "dump_directory" option, generates a set of
       DBIx::Class classes from	an existing database schema read from the
       given dsn.  Without a "dump_directory", creates schema classes in
       memory at runtime without generating on-disk class files.

       For a complete list of supported	loader_options,	see

       The last	hashref	in the "\@connect_info"	can specify the

       This function can be imported in	the usual way, as illustrated in these

	   # Simple example, creates as	a new class 'New::Schema::Name'	in
	   #  memory in	the running perl interpreter.
	   use DBIx::Class::Schema::Loader qw/ make_schema_at /;
	       { debug => 1 },
	       [ 'dbi:Pg:dbname="foo"','postgres','',
		 { loader_class	=> 'MyLoader' }	# optionally

	   # Inside a script, specifying a dump	directory in which to write
	   # class files
	   use DBIx::Class::Schema::Loader qw/ make_schema_at /;
	       { debug => 1, dump_directory => './lib' },
	       [ 'dbi:Pg:dbname="foo"','postgres','',
		 { loader_class	=> 'MyLoader' }	# optionally

       The last	hashref	in the "\@connect_info"	is checked for loader
       arguments such as "loader_options" and "loader_class", see "connection"
       for more	details.

       Return Value: @new_monikers

       Re-scans	the database for newly added tables since the initial load,
       and adds	them to	the schema at runtime, including relationships,	etc.
       Does not	process	drops or changes.

       Returns a list of the new monikers added.

       Arguments: \%opts | $ver

       Controls	the naming options for backward	compatibility, see "naming" in
       DBIx::Class::Schema::Loader::Base for details.

       To upgrade a dynamic schema, use:


       Can be imported into your dump script and called	as a function as well:


       Arguments: 1|0

       Controls	the use_namespaces options for backward	compatibility, see
       "use_namespaces"	in DBIx::Class::Schema::Loader::Base for details.

       To upgrade a dynamic schema, use:


       Can be imported into your dump script and called	as a function as well:


   Multiple Database Schemas
       See "db_schema" in DBIx::Class::Schema::Loader::Base.

       Matt S Trout, all of the	#dbix-class folks, and everyone	who's ever
       sent in a bug report or suggestion.

       Based on	DBIx::Class::Loader by Sebastian Riedel

       Based upon the work of IKEBE Tomohiro

       Caelum: Rafael Kitover <>

       Dag-Erling SmA,rgrav <>

       Matias E. Fernandez <>

       SineSwiper: Brendan Byrd	<>

       TSUNODA Kazuya <>

       acmoore:	Andrew Moore <>

       alnewkirk: Al Newkirk <>

       andrewalker: AndrA(C) Walker <>

       angelixd: Paul C. Mantz <>

       arc: Aaron Crane	<>

       arcanez:	Justin Hunter <>

       ash: Ash	Berlin <>

       blblack:	Brandon	Black <>

       bphillips: Brian	Phillips <>

       btilly: Ben Tilly <>

       domm: Thomas Klausner <>

       gugu: Andrey Kostenko <>

       hobbs: Andrew Rodland <>

       ilmari: Dagfinn Ilmari MannsAYker <>

       jhannah:	Jay Hannah <>

       jnap: John Napiorkowski <>

       kane: Jos Boumans <>

       mattp: Matt Phillips <>

       mephinet: Philipp Gortan	<>

       moritz: Moritz Lenz <>

       mst: Matt S. Trout <>

       mstratman: Mark A. Stratman <>

       oalders:	Olaf Alders <>

       rbo: Robert Bohne <>

       rbuels: Robert Buels <>

       ribasushi: Peter	Rabbitson <>

       schwern:	Michael	G. Schwern <>

       spb: Stephen Bennett <>

       timbunce: Tim Bunce <>

       waawaamilk: Nigel McNie <>

       ... and lots of other folks. If we forgot you, please write the current
       maintainer or RT.

       Copyright (c) 2006 - 2015 by the	aforementioned "AUTHORS" in

       This library is free software; you can redistribute it and/or modify it
       under the same terms as Perl itself.

       DBIx::Class, DBIx::Class::Manual::Intro,	DBIx::Class::Tutorial,

perl v5.32.1			  2018-03-21	DBIx::Class::Schema::Loader(3)


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