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Schema.pm
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Schema.pm
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package VegGuide::Schema;
use strict;
use warnings;
use Alzabo::Runtime::Schema;
use File::Slurp ();
use Lingua::EN::Inflect ();
use VegGuide::Config;
# Turns FooBar into foo_bar
sub calm_form {
my $string = shift;
$string =~ s/(^|.)([A-Z])/$1 ? "$1\L_$2" : "\L$2"/ge;
return $string;
}
sub is_linking_table {
my $t = shift;
return ( $t->columns == 2
&& $t->primary_key_size == 2
&& ( my @temp = $t->all_foreign_keys ) == 2 );
}
sub _namer {
my %p = @_;
if ( $p{table} || $p{column} ) {
my $table = $p{table} || $p{column}->table();
return if $table->name() eq 'Session';
unless ( grep { $p{type} eq $_ } qw( table table_column ) ) {
return if is_linking_table($table);
}
}
if ( $p{type} eq 'table' ) {
my $name = $p{table}->name() . '_t';
return if defined &{"VegGuide::Alzabo::Schema::$name"};
return $name;
}
if ( $p{type} eq 'table_column' ) {
my $table = $p{column}->table()->name();
my $name = $p{column}->name() . '_c';
return if defined &{"VegGuide::Alzabo::Table::${table}::$name"};
return $name;
}
if ( $p{type} eq 'foreign_key' ) {
my $name = $p{foreign_key}->table_to->name;
my $from = $p{foreign_key}->table_from->name;
$name =~ s/$from//;
my $method;
if ( $p{plural} ) {
$method = my_PL( calm_form($name) );
}
else {
$method = calm_form($name);
}
$method =~ s/date_time/datetime/;
return if defined &{"VegGuide::Alzabo::Row::${from}::$method"};
return $method;
}
if ( $p{type} eq 'linking_table' ) {
my $method = $p{foreign_key}->table_to->name;
my $tname = $p{foreign_key}->table_from->name;
$method =~ s/$tname//;
my $name = my_PL( calm_form($method) );
return if defined &{"VegGuide::Alzabo::Row::${tname}::$name"};
return $name;
}
die "unknown type in call to naming sub: $p{type}\n";
}
sub my_PL {
my $name = shift;
return 'hours' if $name eq 'hours';
return Lingua::EN::Inflect::PL($name);
}
BEGIN {
Alzabo::Config::root_dir( VegGuide::Config->AlzaboRootDir() );
}
# needs to come after above sub definitions
use Alzabo::MethodMaker (
schema => 'RegVeg',
class_root => 'VegGuide::Alzabo',
name_maker => \&_namer,
tables => 1,
table_columns => 1,
foreign_keys => 1,
linking_tables => 1,
);
{
my $Schema;
my $LastPid;
sub Connect {
my $class = shift;
# If we get a schema during server startup, but we want to
# reconnect in Apache child processes.
if ( $Schema && $Schema->driver()->handle() ) {
unless ( $LastPid == $$ ) {
$Schema->disconnect();
$Schema->connect();
$LastPid = $$;
return $Schema;
}
}
if ( $Schema && $Schema->driver()->handle() ) {
unless ( $Schema->driver()->handle()->ping() ) {
$Schema->disconnect();
$Schema->connect();
}
return $Schema;
}
my $schema = $class->Schema();
my %c = VegGuide::Config->DBConnectParams();
$schema->set_user( $c{user} );
$schema->set_password( $c{password} );
$schema->connect();
$schema->VendorComment_t()
->set_prefetch( $schema->VendorComment_t()->columns() );
$schema->LocationComment_t()
->set_prefetch( $schema->LocationComment_t()->columns() );
$schema->set_referential_integrity(1);
$LastPid = $$;
return $schema;
}
sub Schema {
return $Schema
||= Alzabo::Runtime::Schema->load_from_file( name => 'RegVeg' );
}
}
sub CreateSchema {
my $class = shift;
require Alzabo::Create::Schema;
return Alzabo::Create::Schema->load_from_file( name => 'RegVeg' );
}
sub ColumnNameAsLabel {
shift;
my $name = shift;
$name =~ s/_/ /g;
$name =~ s/(\d)$/ $1/;
return ucfirst $name;
}
1;
__END__