[dbsrgits/SQL-Translator.git] / lib / SQL / Translator / Producer / ClassDBI.pm

package SQL::Translator::Producer::ClassDBI;

# -------------------------------------------------------------------
# $Id: ClassDBI.pm,v 1.40 2004-02-09 23:02:11 kycl4rk Exp $
# -------------------------------------------------------------------
# Copyright (C) 2002-4 SQLFairy Authors
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
# 02111-1307  USA
# -------------------------------------------------------------------

use strict;
use vars qw[ $VERSION $DEBUG ];
$VERSION = sprintf "%d.%02d", q$Revision: 1.40 $ =~ /(\d+)\.(\d+)/;
$DEBUG = 1 unless defined $DEBUG;

use SQL::Translator::Schema::Constants;
use SQL::Translator::Utils qw(header_comment);
use Data::Dumper;

my %CDBI_auto_pkgs = (
    MySQL      => 'mysql',
    PostgreSQL => 'Pg',
    Oracle     => 'Oracle',
);

# -------------------------------------------------------------------
sub produce {
    my $t      = shift;
    my $create = undef;
    local $DEBUG = $t->debug;
    my $no_comments   = $t->no_comments;
    my $schema        = $t->schema;
    my $args          = $t->producer_args;
    my $db_user       = $args->{'db_user'} || '';
    my $db_pass       = $args->{'db_pass'} || '';
    my $main_pkg_name = $args->{'main_pkg_name'} ||
                        $t->format_package_name('DBI');
    my $header        = header_comment( __PACKAGE__, "# " );
    my $parser_type   = ( split /::/, $t->parser_type )[-1];
    my $from          = $CDBI_auto_pkgs{$parser_type} || '';
    my $dsn           = $args->{'dsn'} || sprintf( 'dbi:%s:_', 
        $CDBI_auto_pkgs{ $parser_type } 
        ? $CDBI_auto_pkgs{ $parser_type } : $parser_type 
    );
    my $sep           = '# ' . '-' x 67;

    #
    # Identify "link tables" (have only PK and FK fields).
    #
    my %linkable;
    my %linktable;
    foreach my $table ( $schema->get_tables ) {
        my $is_link = 1;
        foreach my $field ( $table->get_fields ) {
            unless ( $field->is_primary_key or $field->is_foreign_key ) {
                $is_link = 0;
                last;
            }
        }

        next unless $is_link;

        foreach my $left ( $table->get_fields ) {
            next unless $left->is_foreign_key;
            my $lfk = $left->foreign_key_reference or next;
            my $lr_table = $schema->get_table( $lfk->reference_table )
              or next;
            my $lr_field_name = ( $lfk->reference_fields )[0];
            my $lr_field      = $lr_table->get_field($lr_field_name);
            next unless $lr_field->is_primary_key;

            foreach my $right ( $table->get_fields ) {
                next if $left->name eq $right->name;

                my $rfk = $right->foreign_key_reference or next;
                my $rr_table = $schema->get_table( $rfk->reference_table )
                  or next;
                my $rr_field_name = ( $rfk->reference_fields )[0];
                my $rr_field      = $rr_table->get_field($rr_field_name);
                next unless $rr_field->is_primary_key;

                $linkable{ $lr_table->name }{ $rr_table->name } = $table;
                $linkable{ $rr_table->name }{ $lr_table->name } = $table;
                $linktable{ $table->name } = $table;
            }
        }
    }

    #
    # Iterate over all tables
    #
    my ( %packages, $order );
    for my $table ( $schema->get_tables ) {
        my $table_name = $table->name or next;

        my $table_pkg_name = $t->format_package_name($table_name);
        $packages{$table_pkg_name} = {
            order    => ++$order,
            pkg_name => $table_pkg_name,
            base     => $main_pkg_name,
            table    => $table_name,
        };

        #
        # Primary key may have a differenct accessor method name
        #
        if ( my $constraint = $table->primary_key ) {
            my $field = ( $constraint->fields )[0];
            $packages{ $table_pkg_name }{'_columns_primary'} = $field;

            if ( my $pk_xform = $t->format_pk_name ) {
                my $pk_name = $pk_xform->( $table_pkg_name, $field );

                $packages{$table_pkg_name}{'pk_accessor'} =
                  "#\n# Primary key accessor\n#\n"
                  . "sub $pk_name {\n    shift->$field\n}\n\n";
            }
        }

        my $is_data = 0;
        foreach my $field ( $table->get_fields ) {
            if ( !$field->is_foreign_key and !$field->is_primary_key ) {
                push @{ $packages{$table_pkg_name}{'_columns_essential'} },
                  $field->name;
                $is_data++;
            }
            elsif ( !$field->is_primary_key ) {
                push @{ $packages{$table_pkg_name}{'_columns_others'} },
                  $field->name;
            }
        }

        my %linked;
        if ($is_data) {
            foreach my $link ( keys %{ $linkable{$table_name} } ) {
                my $linkmethodname;

                if ( my $fk_xform = $t->format_fk_name ) {

                    # ADD CALLBACK FOR PLURALIZATION MANGLING HERE
                    $linkmethodname = $fk_xform->(
                        $linkable{ $table_name }{ $link }->name,
                        ( $schema->get_table( $link )->primary_key->fields )[0]
                      )
                      . 's';
                }
                else {
                    # ADD CALLBACK FOR PLURALIZATION MANGLING HERE
                    $linkmethodname =
                      $linkable{ $table_name }{ $link }->name . '_'
                      . ( $schema->get_table( $link )->primary_key->fields )[0]
                      . 's';
                }

                my @rk_fields = ();
                my @lk_fields = ();
                foreach my $field ( $linkable{$table_name}{$link}->get_fields )
                {
                    next unless $field->is_foreign_key;

                    next unless ( 
                        $field->foreign_key_reference->reference_table eq
                           $table_name
                        || 
                        $field->foreign_key_reference->reference_table eq $link 
                    );

                    push @lk_fields,
                      ( $field->foreign_key_reference->reference_fields )[0]
                      if $field->foreign_key_reference->reference_table eq
                      $link;

                    push @rk_fields, $field->name
                      if $field->foreign_key_reference->reference_table eq
                      $table_name;
                }

                #
                # If one possible traversal via link table.
                #
                if ( scalar(@rk_fields) == 1 and scalar(@lk_fields) == 1 ) {
                    foreach my $rk_field (@rk_fields) {
                        push @{ $packages{$table_pkg_name}{'has_many'}{$link} },
                          "sub "
                          . $linkmethodname
                          . " { my \$self = shift; "
                          . "return map \$_->"
                          . ( $schema->get_table($link)->primary_key->fields )
                          [0]
                          . ", \$self->"
                          . $linkable{$table_name}{$link}->name . "_"
                          . $rk_field
                          . " }\n\n";
                    }

                    #
                    # Else there is more than one way to traverse it.
                    # ack!  Let's treat these types of link tables as
                    # a many-to-one (easier)
                    #
                    # NOTE: we need to rethink the link method name,
                    # as the cardinality has shifted on us.
                    #
                }
                elsif ( scalar(@rk_fields) == 1 ) {
                    foreach my $rk_field (@rk_fields) {
                        #
                        # ADD CALLBACK FOR PLURALIZATION MANGLING HERE
                        #
                        push @{ $packages{$table_pkg_name}{'has_many'}{$link} },
                          "sub "
                          . $linkable{$table_name}{$link}->name
                          . "s { my \$self = shift; return \$self->"
                          . $linkable{$table_name}{$link}->name . "_"
                          . $rk_field
                          . "(\@_) }\n\n";
                    }
                }
                elsif ( scalar(@lk_fields) == 1 ) {
                    #
                    # These will be taken care of on the other end...
                    #
                }
                else {
                    #
                    # Many many many.  Need multiple iterations here,
                    # data structure revision to handle N FK sources.
                    # This code has not been tested and likely doesn't
                    # work here.
                    #
                    foreach my $rk_field (@rk_fields) {
                        # ADD CALLBACK FOR PLURALIZATION MANGLING HERE
                        push @{ $packages{$table_pkg_name}{'has_many'}{$link} },
                          "sub "
                          . $linkable{$table_name}{$link}->name . "_"
                          . $rk_field
                          . "s { my \$self = shift; return \$self->"
                          . $linkable{$table_name}{$link}->name . "_"
                          . $rk_field
                          . "(\@_) }\n\n";
                    }
                }
            }
        }

        #
        # Use foreign keys to set up "has_a/has_many" relationships.
        #
        foreach my $field ( $table->get_fields ) {
            if ( $field->is_foreign_key ) {
                my $table_name = $table->name;
                my $field_name = $field->name;
                my $fk_method  = $t->format_fk_name( $table_name, $field_name );
                my $fk         = $field->foreign_key_reference;
                my $ref_table  = $fk->reference_table;
                my $ref_pkg    = $t->format_package_name($ref_table);
                my $ref_field  = ( $fk->reference_fields )[0];

                push @{ $packages{$table_pkg_name}{'has_a'} },
                  "$table_pkg_name->has_a(\n"
                  . "    $field_name => '$ref_pkg'\n);\n\n"
                  . "sub $fk_method {\n"
                  . "    return shift->$field_name\n}\n\n";

                # if there weren't M-M relationships via the has_many
                # being set up here, create nice pluralized method alias
                # rather for user as alt. to ugly tablename_fieldname name
                #
                if ( !$packages{$ref_pkg}{'has_many'}{$table_name} ) {
                    #
                    # ADD CALLBACK FOR PLURALIZATION MANGLING HERE
                    #
                    push @{ $packages{$ref_pkg}{'has_many'}{$table_name} },
                        "sub ${table_name}s {\n    " .
                        "return shift->$table_name\_$field_name\n}\n\n";
                    # else ugly
                }
                else {
                }

                push @{ $packages{$ref_pkg}{'has_many'}{$table_name} },
                  "$ref_pkg->has_many(\n    '${table_name}_${field_name}', "
                  . "'$table_pkg_name' => '$field_name'\n);\n\n";

            }
        }
    }

    #
    # Now build up text of package.
    #
    my $base_pkg = sprintf( 'Class::DBI%s', $from ? "::$from" : '' );
    $create .= join ( "\n",
        "package $main_pkg_name;\n",
        $header,
        "use strict;",
        "use base '$base_pkg';\n",
        "$main_pkg_name->set_db('Main', '$dsn', '$db_user', '$db_pass');\n\n",
    );

    for my $pkg_name (
        sort { $packages{ $a }{'order'} <=> $packages{ $b }{'order'} }
        keys %packages
    ) {
        my $pkg = $packages{$pkg_name} or next;
        next unless $pkg->{'pkg_name'};

        $create .= join ( "\n",
            $sep,
            "package " . $pkg->{'pkg_name'} . ";",
            "use base '" . $pkg->{'base'} . "';",
            "use Class::DBI::Pager;\n\n",
        );

                if ( $from ) {
                    $create .= 
                        $pkg->{'pkg_name'}."->set_up_table('".$pkg->{'table'}."');\n\n";
                }
                else {
                    my $table       = $schema->get_table( $pkg->{'table'} );
                    my @field_names = map { $_->name } $table->get_fields;
					
                    $create .= join("\n",
                        $pkg_name."->table('".$pkg->{'table'}."');\n",
                        $pkg_name."->columns(All => qw/".
                        join(' ', @field_names)."/);\n\n",
                    );
                }

        $create .= "\n";

        if ( my $pk = $pkg->{'pk_accessor'} ) {
            $create .= $pk;
        }

        if ( my @has_a = @{ $pkg->{'has_a'} || [] } ) {
            $create .= $_ for @has_a;
        }

        foreach my $has_many_key ( keys %{ $pkg->{'has_many'} } ) {
            if ( my @has_many = @{ $pkg->{'has_many'}{$has_many_key} || [] } ) {
                $create .= $_ for @has_many;
            }
        }
    }

    $create .= "1;\n";

    return $create;
}

1;

# -------------------------------------------------------------------

=pod

=head1 NAME

SQL::Translator::Producer::ClassDBI - create Class::DBI classes from schema

=head1 SYNOPSIS

Use this producer as you would any other from SQL::Translator.  See
L<SQL::Translator> for details.

This package utilizes SQL::Translator's formatting methods
format_package_name(), format_pk_name(), format_fk_name(), and
format_table_name() as it creates classes, one per table in the schema
provided.  An additional base class is also created for database connectivity
configuration.  See L<Class::DBI> for details on how this works.

=head1 AUTHORS

Allen Day E<lt>allenday@ucla.eduE<gt>,
Ying Zhang E<lt>zyolive@yahoo.comE<gt>,
Ken Y. Clark E<lt>kclark@cpan.orgE<gt>.
Commit	Line	Data
f42e7027	1	package SQL::Translator::Producer::ClassDBI;
	2
	3	# -------------------------------------------------------------------
977651a5	4	# $Id: ClassDBI.pm,v 1.40 2004-02-09 23:02:11 kycl4rk Exp $
f42e7027	5	# -------------------------------------------------------------------
977651a5	6	# Copyright (C) 2002-4 SQLFairy Authors
f42e7027	7	#
	8	# This program is free software; you can redistribute it and/or
	9	# modify it under the terms of the GNU General Public License as
	10	# published by the Free Software Foundation; version 2.
	11	#
	12	# This program is distributed in the hope that it will be useful, but
	13	# WITHOUT ANY WARRANTY; without even the implied warranty of
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	# General Public License for more details.
	16	#
	17	# You should have received a copy of the GNU General Public License
	18	# along with this program; if not, write to the Free Software
	19	# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	20	# 02111-1307 USA
	21	# -------------------------------------------------------------------
	22
	23	use strict;
	24	use vars qw[ $VERSION $DEBUG ];
977651a5	25	$VERSION = sprintf "%d.%02d", q$Revision: 1.40 $ =~ /(\d+)\.(\d+)/;
41a7b982	26	$DEBUG = 1 unless defined $DEBUG;
f42e7027	27
6c45056f	28	use SQL::Translator::Schema::Constants;
5ee19df8	29	use SQL::Translator::Utils qw(header_comment);
71046f4b	30	use Data::Dumper;
f42e7027	31
bf4629e7	32	my %CDBI_auto_pkgs = (
71046f4b	33	MySQL => 'mysql',
	34	PostgreSQL => 'Pg',
	35	Oracle => 'Oracle',
bf4629e7	36	);
	37
	38	# -------------------------------------------------------------------
f42e7027	39	sub produce {
41a7b982	40	my $t = shift;
	41	my $create = undef;
	42	local $DEBUG = $t->debug;
390292d3	43	my $no_comments = $t->no_comments;
	44	my $schema = $t->schema;
	45	my $args = $t->producer_args;
bf4629e7	46	my $db_user = $args->{'db_user'} \|\| '';
bf4629e7	47	my $db_pass = $args->{'db_pass'} \|\| '';
41a7b982	48	my $main_pkg_name = $args->{'main_pkg_name'} \|\|
	49	$t->format_package_name('DBI');
	50	my $header = header_comment( __PACKAGE__, "# " );
390292d3	51	my $parser_type = ( split /::/, $t->parser_type )[-1];
41a7b982	52	my $from = $CDBI_auto_pkgs{$parser_type} \|\| '';
	53	my $dsn = $args->{'dsn'} \|\| sprintf( 'dbi:%s:_',
	54	$CDBI_auto_pkgs{ $parser_type }
	55	? $CDBI_auto_pkgs{ $parser_type } : $parser_type
	56	);
71046f4b	57	my $sep = '# ' . '-' x 67;
fe77d758	58
	59	#
	60	# Identify "link tables" (have only PK and FK fields).
	61	#
	62	my %linkable;
	63	my %linktable;
	64	foreach my $table ( $schema->get_tables ) {
	65	my $is_link = 1;
	66	foreach my $field ( $table->get_fields ) {
	67	unless ( $field->is_primary_key or $field->is_foreign_key ) {
41a7b982	68	$is_link = 0;
fe77d758	69	last;
	70	}
	71	}
	72
	73	next unless $is_link;
41a7b982	74
fe77d758	75	foreach my $left ( $table->get_fields ) {
fe77d758	76	next unless $left->is_foreign_key;
41a7b982	77	my $lfk = $left->foreign_key_reference or next;
	78	my $lr_table = $schema->get_table( $lfk->reference_table )
	79	or next;
	80	my $lr_field_name = ( $lfk->reference_fields )[0];
fe77d758	81	my $lr_field = $lr_table->get_field($lr_field_name);
	82	next unless $lr_field->is_primary_key;
	83
	84	foreach my $right ( $table->get_fields ) {
	85	next if $left->name eq $right->name;
41a7b982	86
41a7b982	87	my $rfk = $right->foreign_key_reference or next;
fe77d758	88	my $rr_table = $schema->get_table( $rfk->reference_table )
41a7b982	89	or next;
41a7b982	90	my $rr_field_name = ( $rfk->reference_fields )[0];
fe77d758	91	my $rr_field = $rr_table->get_field($rr_field_name);
fe77d758	92	next unless $rr_field->is_primary_key;
41a7b982	93
c703e51d	94	$linkable{ $lr_table->name }{ $rr_table->name } = $table;
c703e51d	95	$linkable{ $rr_table->name }{ $lr_table->name } = $table;
fe77d758	96	$linktable{ $table->name } = $table;
	97	}
	98	}
	99	}
c703e51d	100
6c45056f	101	#
71046f4b	102	# Iterate over all tables
6c45056f	103	#
bf4629e7	104	my ( %packages, $order );
6c45056f	105	for my $table ( $schema->get_tables ) {
6c45056f	106	my $table_name = $table->name or next;
6c45056f	107
390292d3	108	my $table_pkg_name = $t->format_package_name($table_name);
41a7b982	109	$packages{$table_pkg_name} = {
	110	order => ++$order,
	111	pkg_name => $table_pkg_name,
	112	base => $main_pkg_name,
	113	table => $table_name,
bf4629e7	114	};
6c45056f	115
6c45056f	116	#
bf4629e7	117	# Primary key may have a differenct accessor method name
6c45056f	118	#
41a7b982	119	if ( my $constraint = $table->primary_key ) {
	120	my $field = ( $constraint->fields )[0];
	121	$packages{ $table_pkg_name }{'_columns_primary'} = $field;
d79af833	122
41a7b982	123	if ( my $pk_xform = $t->format_pk_name ) {
41a7b982	124	my $pk_name = $pk_xform->( $table_pkg_name, $field );
b789c790	125
41a7b982	126	$packages{$table_pkg_name}{'pk_accessor'} =
	127	"#\n# Primary key accessor\n#\n"
	128	. "sub $pk_name {\n shift->$field\n}\n\n";
bf4629e7	129	}
6c45056f	130	}
d79af833	131
	132	my $is_data = 0;
	133	foreach my $field ( $table->get_fields ) {
41a7b982	134	if ( !$field->is_foreign_key and !$field->is_primary_key ) {
	135	push @{ $packages{$table_pkg_name}{'_columns_essential'} },
	136	$field->name;
	137	$is_data++;
	138	}
	139	elsif ( !$field->is_primary_key ) {
	140	push @{ $packages{$table_pkg_name}{'_columns_others'} },
	141	$field->name;
	142	}
d79af833	143	}
d79af833	144
41a7b982	145	my %linked;
	146	if ($is_data) {
	147	foreach my $link ( keys %{ $linkable{$table_name} } ) {
	148	my $linkmethodname;
	149
	150	if ( my $fk_xform = $t->format_fk_name ) {
	151
	152	# ADD CALLBACK FOR PLURALIZATION MANGLING HERE
	153	$linkmethodname = $fk_xform->(
	154	$linkable{ $table_name }{ $link }->name,
	155	( $schema->get_table( $link )->primary_key->fields )[0]
	156	)
	157	. 's';
	158	}
	159	else {
	160	# ADD CALLBACK FOR PLURALIZATION MANGLING HERE
	161	$linkmethodname =
	162	$linkable{ $table_name }{ $link }->name . '_'
	163	. ( $schema->get_table( $link )->primary_key->fields )[0]
	164	. 's';
	165	}
	166
	167	my @rk_fields = ();
	168	my @lk_fields = ();
	169	foreach my $field ( $linkable{$table_name}{$link}->get_fields )
	170	{
	171	next unless $field->is_foreign_key;
	172
	173	next unless (
	174	$field->foreign_key_reference->reference_table eq
	175	$table_name
	176	\|\|
	177	$field->foreign_key_reference->reference_table eq $link
	178	);
	179
	180	push @lk_fields,
	181	( $field->foreign_key_reference->reference_fields )[0]
	182	if $field->foreign_key_reference->reference_table eq
	183	$link;
	184
	185	push @rk_fields, $field->name
	186	if $field->foreign_key_reference->reference_table eq
	187	$table_name;
	188	}
	189
	190	#
	191	# If one possible traversal via link table.
	192	#
	193	if ( scalar(@rk_fields) == 1 and scalar(@lk_fields) == 1 ) {
	194	foreach my $rk_field (@rk_fields) {
	195	push @{ $packages{$table_pkg_name}{'has_many'}{$link} },
	196	"sub "
	197	. $linkmethodname
	198	. " { my \$self = shift; "
	199	. "return map \$_->"
	200	. ( $schema->get_table($link)->primary_key->fields )
	201	[0]
	202	. ", \$self->"
	203	. $linkable{$table_name}{$link}->name . "_"
	204	. $rk_field
	205	. " }\n\n";
	206	}
	207
	208	#
209	# Else there is more than one way to traverse it.
210	# ack! Let's treat these types of link tables as
211	# a many-to-one (easier)
212	#
213	# NOTE: we need to rethink the link method name,
214	# as the cardinality has shifted on us.
215	#
216	}
217	elsif ( scalar(@rk_fields) == 1 ) {
218	foreach my $rk_field (@rk_fields) {
219	#
220	# ADD CALLBACK FOR PLURALIZATION MANGLING HERE
221	#
222	push @{ $packages{$table_pkg_name}{'has_many'}{$link} },
223	"sub "
224	. $linkable{$table_name}{$link}->name
225	. "s { my \$self = shift; return \$self->"
226	. $linkable{$table_name}{$link}->name . "_"
227	. $rk_field
228	. "(\@_) }\n\n";
229	}
230	}
231	elsif ( scalar(@lk_fields) == 1 ) {
232	#
233	# These will be taken care of on the other end...
234	#
235	}
236	else {
237	#
238	# Many many many. Need multiple iterations here,
239	# data structure revision to handle N FK sources.
240	# This code has not been tested and likely doesn't
241	# work here.
242	#
243	foreach my $rk_field (@rk_fields) {
244	# ADD CALLBACK FOR PLURALIZATION MANGLING HERE
245	push @{ $packages{$table_pkg_name}{'has_many'}{$link} },
246	"sub "
247	. $linkable{$table_name}{$link}->name . "_"
248	. $rk_field
249	. "s { my \$self = shift; return \$self->"
250	. $linkable{$table_name}{$link}->name . "_"
251	. $rk_field
252	. "(\@_) }\n\n";
253	}
254	}
255	}
256	}
d79af833	257
6c45056f	258	#
bf4629e7	259	# Use foreign keys to set up "has_a/has_many" relationships.
6c45056f	260	#
	261	foreach my $field ( $table->get_fields ) {
	262	if ( $field->is_foreign_key ) {
bf4629e7	263	my $table_name = $table->name;
6c45056f	264	my $field_name = $field->name;
41a7b982	265	my $fk_method = $t->format_fk_name( $table_name, $field_name );
6c45056f	266	my $fk = $field->foreign_key_reference;
6c45056f	267	my $ref_table = $fk->reference_table;
390292d3	268	my $ref_pkg = $t->format_package_name($ref_table);
41a7b982	269	my $ref_field = ( $fk->reference_fields )[0];
6c45056f	270
41a7b982	271	push @{ $packages{$table_pkg_name}{'has_a'} },
	272	"$table_pkg_name->has_a(\n"
	273	. " $field_name => '$ref_pkg'\n);\n\n"
	274	. "sub $fk_method {\n"
	275	. " return shift->$field_name\n}\n\n";
52fbac6a	276
41a7b982	277	# if there weren't M-M relationships via the has_many
	278	# being set up here, create nice pluralized method alias
	279	# rather for user as alt. to ugly tablename_fieldname name
	280	#
	281	if ( !$packages{$ref_pkg}{'has_many'}{$table_name} ) {
	282	#
	283	# ADD CALLBACK FOR PLURALIZATION MANGLING HERE
	284	#
	285	push @{ $packages{$ref_pkg}{'has_many'}{$table_name} },
	286	"sub ${table_name}s {\n " .
	287	"return shift->$table_name\_$field_name\n}\n\n";
	288	# else ugly
	289	}
	290	else {
	291	}
	292
	293	push @{ $packages{$ref_pkg}{'has_many'}{$table_name} },
	294	"$ref_pkg->has_many(\n '${table_name}_${field_name}', "
	295	. "'$table_pkg_name' => '$field_name'\n);\n\n";
71046f4b	296
fe77d758	297	}
41a7b982	298	}
41a7b982	299	}
6c45056f	300
fe77d758	301	#
	302	# Now build up text of package.
	303	#
bf4629e7	304	my $base_pkg = sprintf( 'Class::DBI%s', $from ? "::$from" : '' );
41a7b982	305	$create .= join ( "\n",
	306	"package $main_pkg_name;\n",
	307	$header,
	308	"use strict;",
	309	"use base '$base_pkg';\n",
	310	"$main_pkg_name->set_db('Main', '$dsn', '$db_user', '$db_pass');\n\n",
	311	);
	312
	313	for my $pkg_name (
bf4629e7	314	sort { $packages{ $a }{'order'} <=> $packages{ $b }{'order'} }
	315	keys %packages
	316	) {
8b183a02	317	my $pkg = $packages{$pkg_name} or next;
8b183a02	318	next unless $pkg->{'pkg_name'};
bf4629e7	319
41a7b982	320	$create .= join ( "\n",
bf4629e7	321	$sep,
41a7b982	322	"package " . $pkg->{'pkg_name'} . ";",
41a7b982	323	"use base '" . $pkg->{'base'} . "';",
bf4629e7	324	"use Class::DBI::Pager;\n\n",
41a7b982	325	);
41a7b982	326
9c6eb8e3	327	if ( $from ) {
	328	$create .=
	329	$pkg->{'pkg_name'}."->set_up_table('".$pkg->{'table'}."');\n\n";
	330	}
	331	else {
	332	my $table = $schema->get_table( $pkg->{'table'} );
	333	my @field_names = map { $_->name } $table->get_fields;
420f63c7	334
9c6eb8e3	335	$create .= join("\n",
	336	$pkg_name."->table('".$pkg->{'table'}."');\n",
	337	$pkg_name."->columns(All => qw/".
	338	join(' ', @field_names)."/);\n\n",
	339	);
	340	}
b789c790	341
41a7b982	342	$create .= "\n";
b789c790	343
bf4629e7	344	if ( my $pk = $pkg->{'pk_accessor'} ) {
	345	$create .= $pk;
	346	}
df602cfb	347
bf4629e7	348	if ( my @has_a = @{ $pkg->{'has_a'} \|\| [] } ) {
	349	$create .= $_ for @has_a;
	350	}
	351
41a7b982	352	foreach my $has_many_key ( keys %{ $pkg->{'has_many'} } ) {
	353	if ( my @has_many = @{ $pkg->{'has_many'}{$has_many_key} \|\| [] } ) {
	354	$create .= $_ for @has_many;
	355	}
	356	}
6c45056f	357	}
df602cfb	358
bf4629e7	359	$create .= "1;\n";
	360
	361	return $create;
f42e7027	362	}
	363
	364	1;
	365
bf4629e7	366	# -------------------------------------------------------------------
	367
	368	=pod
f42e7027	369
	370	=head1 NAME
	371
bf4629e7	372	SQL::Translator::Producer::ClassDBI - create Class::DBI classes from schema
f42e7027	373
	374	=head1 SYNOPSIS
	375
1eee27d3	376	Use this producer as you would any other from SQL::Translator. See
1eee27d3	377	L<SQL::Translator> for details.
f42e7027	378
1eee27d3	379	This package utilizes SQL::Translator's formatting methods
	380	format_package_name(), format_pk_name(), format_fk_name(), and
	381	format_table_name() as it creates classes, one per table in the schema
	382	provided. An additional base class is also created for database connectivity
	383	configuration. See L<Class::DBI> for details on how this works.
f42e7027	384
6c45056f	385	=head1 AUTHORS
f42e7027	386
7c2e6f47	387	Allen Day E<lt>allenday@ucla.eduE<gt>,
5f054727	388	Ying Zhang E<lt>zyolive@yahoo.comE<gt>,
799df8f9	389	Ken Y. Clark E<lt>kclark@cpan.orgE<gt>.