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package A3C::SQL; |
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|
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use strict; |
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use warnings; |
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|
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use base qw(Jifty::Object Class::Accessor::Fast); |
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__PACKAGE__->mk_accessors( qw(query arguments dbh encoding duration) ); |
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|
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use Data::Dump qw/dump/; |
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use Time::HiRes qw/time/; |
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|
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=head1 NAME |
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|
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A3C::SQL |
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|
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=head1 DESCRIPTION |
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|
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Issue SQL queries |
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|
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=head1 METHODS |
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|
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=head2 new |
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|
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my $sql = A3C::SQL->new({ query => 'select now()' }); |
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|
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As a alternative, if you don't want to use Jifty's database handle, |
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specify it like this: |
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|
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my $sql = A3C::SQL->new({ |
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query => 'select now()', |
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dbh => $my_dbh, |
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encoding => 'UTF-8', |
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}); |
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|
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Mungling with C<encoding> is rearly needed, especially if using recent C<DBD::Pg> as driver. |
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|
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=head2 sth |
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|
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Execute query and return statement handle. Ususally you don't have to call this manually. |
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|
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=cut |
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|
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sub sth { |
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my $self = shift; |
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if ( ! $self->{_sth} ) { |
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my $dbh = $self->dbh || Jifty->handle->dbh; |
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my $sth = $dbh->prepare( $self->query ) or $dbh->errstr; |
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my $t = time(); |
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if ( $self->arguments ) { |
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Jifty->log->debug( $self->sql . ' arguments: ' . dump( $self->arguments ) ); |
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$sth->execute( $self->arguments ) or die $dbh->errstr; |
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} else { |
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$sth->execute or die $dbh->errstr; |
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} |
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$self->duration( time() - $t ); |
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$self->{_sth} = $sth; |
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} |
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|
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return $self->{_sth}; |
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} |
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|
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=head2 next |
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|
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while ( my $row = $sql->next ) { |
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print $row->now; |
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} |
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|
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=cut |
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|
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sub next { |
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my $self = shift; |
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my $row = $self->sth->fetchrow_hashref; |
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return unless defined $row; |
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return A3C::SQL::row->new( $row, $self->encoding ); |
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} |
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|
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=head2 count |
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|
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print $sql->count; |
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|
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=cut |
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|
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sub count { |
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my $self = shift; |
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return $self->sth->rows; |
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} |
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|
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=head1 HELPERS |
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|
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This helpers are accessor to L<DBI> |
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|
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=head2 _column_names |
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|
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my @columns = $sql->_column_names; |
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|
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=cut |
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|
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sub _column_names { |
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my $self = shift; |
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return @{ $self->sth->{NAME} }; |
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} |
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|
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package A3C::SQL::row; |
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|
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use Encode qw/decode/; |
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use Data::Dump qw/dump/; |
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use base qw/Jifty::Object/; |
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|
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our $AUTOLOAD; |
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|
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sub new { |
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my $that = shift; |
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my $class = ref($that) || $that; |
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my $self = shift; |
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bless $self, $class; |
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$self->{__encoding} = shift || 'UTF-8'; |
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return $self; |
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} |
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|
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sub AUTOLOAD { |
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my $self = shift; |
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my $type = ref($self) or die "$self is not an object"; |
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my $name = $AUTOLOAD; |
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$name =~ s/.*://; |
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my $v = $self->{$name}; |
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Jifty->log->error("SQL: $name doesn't exist") unless defined $v; |
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if ( ! Encode::is_utf8( $v ) ) { |
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eval { $v = decode( $self->{__encoding}, $self->{$name} ) }; |
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if ( $@ ) { |
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warn "## column $name can't decode ",dump( $self->{$name} ); |
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$v = $self->{$name}; |
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} |
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} |
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return $v; |
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} |
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|
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sub DESTROY {} |
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|
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1; |