lib/A3C/SQL.pm

package A3C::SQL;

use strict;
use warnings;

use base qw(Jifty::Object Class::Accessor::Fast);
__PACKAGE__->mk_accessors( qw(query arguments dbh encoding duration) );

use Data::Dump qw/dump/;
use Time::HiRes qw/time/;

=head1 NAME

A3C::SQL

=head1 DESCRIPTION

Issue SQL queries

=head1 METHODS

=head2 new

  my $sql = A3C::SQL->new({ query => 'select now()' });

As a alternative, if you don't want to use Jifty's database handle,
specify it like this:

  my $sql = A3C::SQL->new({
        query => 'select now()',
        dbh => $my_dbh,
        encoding => 'UTF-8',
  });

Mungling with C<encoding> is rearly needed, especially if using recent C<DBD::Pg> as driver.

=head2 sth

Execute query and return statement handle. Ususally you don't have to call this manually.

=cut

sub sth {
        my $self = shift;
        if ( ! $self->{_sth} ) {
                my $dbh = $self->dbh || Jifty->handle->dbh;
                my $sth = $dbh->prepare( $self->query ) or $dbh->errstr;
                my $t = time();
                if ( $self->arguments ) {
                        Jifty->log->debug( $self->sql . ' arguments: ' . dump( $self->arguments ) );
                        $sth->execute( $self->arguments ) or die $dbh->errstr;
                } else {
                        $sth->execute or die $dbh->errstr;
                }
                $self->duration( time() - $t );
                $self->{_sth} = $sth;
        }

        return $self->{_sth};
}

=head2 next

  while ( my $row = $sql->next ) {
        print $row->now;
  }

=cut

sub next {
        my $self = shift;
        my $row = $self->sth->fetchrow_hashref;
        return unless defined $row;
        return A3C::SQL::row->new( $row, $self->encoding );
}

=head2 count

  print $sql->count;

=cut

sub count {
        my $self = shift;
        return $self->sth->rows;
}

=head1 HELPERS

This helpers are accessor to L<DBI>

=head2 _column_names

  my @columns = $sql->_column_names;

=cut

sub _column_names {
        my $self = shift;
        return @{ $self->sth->{NAME} };
}

package A3C::SQL::row;

use Encode qw/decode/;
use Data::Dump qw/dump/;
use base qw/Jifty::Object/;

our $AUTOLOAD;

sub new {
        my $that  = shift;
        my $class = ref($that) || $that;
        my $self = shift;
        bless $self, $class;
        $self->{__encoding} = shift || 'UTF-8';
        return $self;
}  

sub AUTOLOAD {
        my $self = shift;
        my $type = ref($self) or die "$self is not an object";
        my $name = $AUTOLOAD;
        $name =~ s/.*://;
        my $v = $self->{$name};
        Jifty->log->error("SQL: $name doesn't exist") unless defined $v;
        if ( ! Encode::is_utf8( $v ) ) {
                eval { $v = decode( $self->{__encoding}, $self->{$name} ) };
                if ( $@ ) {
                        warn "## column $name can't decode ",dump( $self->{$name} );
                        $v = $self->{$name};
                }
        }
        return $v;
}

sub DESTROY {}

1;
1	package A3C::SQL;
2
3	use strict;
4	use warnings;
5
6	use base qw(Jifty::Object Class::Accessor::Fast);
7	__PACKAGE__->mk_accessors( qw(query arguments dbh encoding duration) );
8
9	use Data::Dump qw/dump/;
10	use Time::HiRes qw/time/;
11
12	=head1 NAME
13
14	A3C::SQL
15
16	=head1 DESCRIPTION
17
18	Issue SQL queries
19
20	=head1 METHODS
21
22	=head2 new
23
24	my $sql = A3C::SQL->new({ query => 'select now()' });
25
26	As a alternative, if you don't want to use Jifty's database handle,
27	specify it like this:
28
29	my $sql = A3C::SQL->new({
30	query => 'select now()',
31	dbh => $my_dbh,
32	encoding => 'UTF-8',
33	});
34
35	Mungling with C<encoding> is rearly needed, especially if using recent C<DBD::Pg> as driver.
36
37	=head2 sth
38
39	Execute query and return statement handle. Ususally you don't have to call this manually.
40
41	=cut
42
43	sub sth {
44	my $self = shift;
45	if ( ! $self->{_sth} ) {
46	my $dbh = $self->dbh \|\| Jifty->handle->dbh;
47	my $sth = $dbh->prepare( $self->query ) or $dbh->errstr;
48	my $t = time();
49	if ( $self->arguments ) {
50	Jifty->log->debug( $self->sql . ' arguments: ' . dump( $self->arguments ) );
51	$sth->execute( $self->arguments ) or die $dbh->errstr;
52	} else {
53	$sth->execute or die $dbh->errstr;
54	}
55	$self->duration( time() - $t );
56	$self->{_sth} = $sth;
57	}
58
59	return $self->{_sth};
60	}
61
62	=head2 next
63
64	while ( my $row = $sql->next ) {
65	print $row->now;
66	}
67
68	=cut
69
70	sub next {
71	my $self = shift;
72	my $row = $self->sth->fetchrow_hashref;
73	return unless defined $row;
74	return A3C::SQL::row->new( $row, $self->encoding );
75	}
76
77	=head2 count
78
79	print $sql->count;
80
81	=cut
82
83	sub count {
84	my $self = shift;
85	return $self->sth->rows;
86	}
87
88	=head1 HELPERS
89
90	This helpers are accessor to L<DBI>
91
92	=head2 _column_names
93
94	my @columns = $sql->_column_names;
95
96	=cut
97
98	sub _column_names {
99	my $self = shift;
100	return @{ $self->sth->{NAME} };
101	}
102
103	package A3C::SQL::row;
104
105	use Encode qw/decode/;
106	use Data::Dump qw/dump/;
107	use base qw/Jifty::Object/;
108
109	our $AUTOLOAD;
110
111	sub new {
112	my $that = shift;
113	my $class = ref($that) \|\| $that;
114	my $self = shift;
115	bless $self, $class;
116	$self->{__encoding} = shift \|\| 'UTF-8';
117	return $self;
118	}
119
120	sub AUTOLOAD {
121	my $self = shift;
122	my $type = ref($self) or die "$self is not an object";
123	my $name = $AUTOLOAD;
124	$name =~ s/.*://;
125	my $v = $self->{$name};
126	Jifty->log->error("SQL: $name doesn't exist") unless defined $v;
127	if ( ! Encode::is_utf8( $v ) ) {
128	eval { $v = decode( $self->{__encoding}, $self->{$name} ) };
129	if ( $@ ) {
130	warn "## column $name can't decode ",dump( $self->{$name} );
131	$v = $self->{$name};
132	}
133	}
134	return $v;
135	}
136
137	sub DESTROY {}
138
139	1;