use List::Util();
__PACKAGE__->mk_group_accessors('simple' =>
- qw/_connect_info _dbi_connect_info _dbh _sql_maker _sql_maker_opts
- _conn_pid _conn_tid transaction_depth _dbh_autocommit savepoints/
+ qw/_connect_info _dbi_connect_info _dbh _sql_maker _sql_maker_opts _conn_pid
+ _conn_tid transaction_depth _dbh_autocommit _driver_determined savepoints/
);
# the values for these accessors are picked out (and deleted) from
}
}
- %attrs = () if (ref $args[0] eq 'CODE'); # _connect() never looks past $args[0] in this case
+ if (ref $args[0] eq 'CODE') {
+ # _connect() never looks past $args[0] in this case
+ %attrs = ()
+ } else {
+ %attrs = (
+ %{ $self->_default_dbi_connect_attributes || {} },
+ %attrs,
+ );
+ }
$self->_dbi_connect_info([@args, keys %attrs ? \%attrs : ()]);
$self->_connect_info;
}
+sub _default_dbi_connect_attributes {
+ return {
+ AutoCommit => 1,
+ RaiseError => 1,
+ PrintError => 0,
+ };
+}
+
=head2 on_connect_do
This method is deprecated in favour of setting via L</connect_info>.
}
};
+ # ->connected might unset $@ - copy
my $exception = $@;
if(!$exception) { return $want_array ? @result : $result[0] }
# We were not connected - reconnect and retry, but let any
# exception fall right through this time
+ carp "Retrying $code after catching disconnected exception: $exception"
+ if $ENV{DBIC_DBIRETRY_DEBUG};
$self->_populate_dbh;
$self->$code($self->_dbh, @_);
}
$self->txn_commit;
};
+ # ->connected might unset $@ - copy
my $exception = $@;
if(!$exception) { return $want_array ? @result : $result[0] }
- if($tried++ > 0 || $self->connected) {
+ if($tried++ || $self->connected) {
eval { $self->txn_rollback };
my $rollback_exception = $@;
if($rollback_exception) {
# We were not connected, and was first try - reconnect and retry
# via the while loop
+ carp "Retrying $coderef after catching disconnected exception: $exception"
+ if $ENV{DBIC_DBIRETRY_DEBUG};
$self->_populate_dbh;
}
}
sub disconnect {
my ($self) = @_;
- if( $self->connected ) {
+ if( $self->_dbh ) {
my @actions;
push @actions, ( $self->on_disconnect_call || () );
$sub->();
}
+=head2 connected
+
+=over
+
+=item Arguments: none
+
+=item Return Value: 1|0
+
+=back
+
+Verifies that the the current database handle is active and ready to execute
+an SQL statement (i.e. the connection did not get stale, server is still
+answering, etc.) This method is used internally by L</dbh>.
+
+=cut
+
sub connected {
- my ($self) = @_;
+ my $self = shift;
+ return 0 unless $self->_seems_connected;
- if(my $dbh = $self->_dbh) {
- if(defined $self->_conn_tid && $self->_conn_tid != threads->tid) {
- $self->_dbh(undef);
- $self->{_dbh_gen}++;
- return;
- }
- else {
- $self->_verify_pid;
- return 0 if !$self->_dbh;
- }
- return ($dbh->FETCH('Active') && $self->_ping);
+ #be on the safe side
+ local $self->_dbh->{RaiseError} = 1;
+
+ return $self->_ping;
+}
+
+sub _seems_connected {
+ my $self = shift;
+
+ my $dbh = $self->_dbh
+ or return 0;
+
+ if(defined $self->_conn_tid && $self->_conn_tid != threads->tid) {
+ $self->_dbh(undef);
+ $self->{_dbh_gen}++;
+ return 0;
+ }
+ else {
+ $self->_verify_pid;
+ return 0 if !$self->_dbh;
}
- return 0;
+ return $dbh->FETCH('Active');
}
sub _ping {
=head2 dbh
-Returns the dbh - a data base handle of class L<DBI>.
+Returns a C<$dbh> - a data base handle of class L<DBI>. The returned handle
+is guaranteed to be healthy by implicitly calling L</connected>, and if
+necessary performing a reconnection before returning. Keep in mind that this
+is very B<expensive> on some database engines. Consider using L<dbh_do>
+instead.
=cut
sub dbh {
my ($self) = @_;
- $self->ensure_connected;
+ if (not $self->_dbh) {
+ $self->_populate_dbh;
+ } else {
+ $self->ensure_connected;
+ }
+ return $self->_dbh;
+}
+
+# this is the internal "get dbh or connect (don't check)" method
+sub _get_dbh {
+ my $self = shift;
+ $self->_populate_dbh unless $self->_dbh;
return $self->_dbh;
}
sub _sql_maker_args {
my ($self) = @_;
- return ( bindtype=>'columns', array_datatypes => 1, limit_dialect => $self->dbh, %{$self->_sql_maker_opts} );
+ return (
+ bindtype=>'columns',
+ array_datatypes => 1,
+ limit_dialect => $self->_get_dbh,
+ %{$self->_sql_maker_opts}
+ );
}
sub sql_maker {
sub _populate_dbh {
my ($self) = @_;
+
my @info = @{$self->_dbi_connect_info || []};
+ $self->_dbh(undef); # in case ->connected failed we might get sent here
$self->_dbh($self->_connect(@info));
$self->_conn_pid($$);
# there is no transaction in progress by definition
$self->{transaction_depth} = $self->_dbh_autocommit ? 0 : 1;
+ $self->_run_connection_actions unless $self->{_in_determine_driver};
+}
+
+sub _run_connection_actions {
+ my $self = shift;
my @actions;
push @actions, ( $self->on_connect_call || () );
sub _determine_driver {
my ($self) = @_;
- if (ref $self eq 'DBIx::Class::Storage::DBI') {
- my $driver;
+ if ((not $self->_driver_determined) && (not $self->{_in_determine_driver})) {
+ my $started_unconnected = 0;
+ local $self->{_in_determine_driver} = 1;
+
+ if (ref($self) eq __PACKAGE__) {
+ my $driver;
+ if ($self->_dbh) { # we are connected
+ $driver = $self->_dbh->{Driver}{Name};
+ } else {
+ # try to use dsn to not require being connected, the driver may still
+ # force a connection in _rebless to determine version
+ ($driver) = $self->_dbi_connect_info->[0] =~ /dbi:([^:]+):/i;
+ $started_unconnected = 1;
+ }
- if ($self->_dbh) { # we are connected
- $driver = $self->_dbh->{Driver}{Name};
- } else {
- # try to use dsn to not require being connected, the driver may still
- # force a connection in _rebless to determine version
- ($driver) = $self->_dbi_connect_info->[0] =~ /dbi:([^:]+):/i;
+ my $storage_class = "DBIx::Class::Storage::DBI::${driver}";
+ if ($self->load_optional_class($storage_class)) {
+ mro::set_mro($storage_class, 'c3');
+ bless $self, $storage_class;
+ $self->_rebless();
+ }
}
- my $storage_class = "DBIx::Class::Storage::DBI::${driver}";
- if ($self->load_optional_class($storage_class)) {
- mro::set_mro($storage_class, 'c3');
- bless $self, $storage_class;
- $self->_rebless();
- }
+ $self->_driver_determined(1);
+
+ $self->_run_connection_actions
+ if $started_unconnected && defined $self->_dbh;
}
}
sub txn_begin {
my $self = shift;
- $self->ensure_connected();
if($self->{transaction_depth} == 0) {
$self->debugobj->txn_begin()
if $self->debug;
- # this isn't ->_dbh-> because
- # we should reconnect on begin_work
- # for AutoCommit users
- $self->dbh->begin_work;
+
+ # being here implies we have AutoCommit => 1
+ # if the user is utilizing txn_do - good for
+ # him, otherwise we need to ensure that the
+ # $dbh is healthy on BEGIN
+ my $dbh_method = $self->{_in_dbh_do} ? '_dbh' : 'dbh';
+ $self->$dbh_method->begin_work;
+
} elsif ($self->auto_savepoint) {
$self->svp_begin;
}
sub insert {
my ($self, $source, $to_insert) = @_;
+# redispatch to insert method of storage we reblessed into, if necessary
+ if (not $self->_driver_determined) {
+ $self->_determine_driver;
+ goto $self->can('insert');
+ }
+
my $ident = $source->from;
my $bind_attributes = $self->source_bind_attributes($source);
my $updated_cols = {};
- $self->ensure_connected;
foreach my $col ( $source->columns ) {
if ( !defined $to_insert->{$col} ) {
my $col_info = $source->column_info($col);
if ( $col_info->{auto_nextval} ) {
- $updated_cols->{$col} = $to_insert->{$col} = $self->_sequence_fetch( 'nextval', $col_info->{sequence} || $self->_dbh_get_autoinc_seq($self->dbh, $source) );
+ $updated_cols->{$col} = $to_insert->{$col} = $self->_sequence_fetch(
+ 'nextval',
+ $col_info->{sequence} ||
+ $self->_dbh_get_autoinc_seq($self->_get_dbh, $source)
+ );
}
}
}
@colvalues{@$cols} = (0..$#$cols);
my ($sql, @bind) = $self->sql_maker->insert($table, \%colvalues);
+ $self->_determine_driver;
+
$self->_query_start( $sql, @bind );
my $sth = $self->sth($sql);
sub update {
my $self = shift @_;
my $source = shift @_;
+ $self->_determine_driver;
my $bind_attributes = $self->source_bind_attributes($source);
return $self->_execute('update' => [], $source, $bind_attributes, @_);
sub delete {
my $self = shift @_;
my $source = shift @_;
-
+ $self->_determine_driver;
my $bind_attrs = $self->source_bind_attributes($source);
return $self->_execute('delete' => [], $source, $bind_attrs, @_);
# alias any functions to the dbic-side 'as' label
# adjust the outer select accordingly
- if (ref $sel eq 'HASH' && !$sel->{-select}) {
- $sel = { -select => $sel, -as => $attrs->{as}[$i] };
- $select->[$i] = join ('.', $attrs->{alias}, ($attrs->{as}[$i] || "select_$i") );
+ if (ref $sel eq 'HASH' ) {
+ $sel->{-as} ||= $attrs->{as}[$i];
+ $select->[$i] = join ('.', $attrs->{alias}, ($sel->{-as} || "select_$i") );
}
push @$sub_select, $sel;
# also note: this adds -result_source => $rsrc to the column info
#
# usage:
-# my $col_sources = $self->_resolve_column_info($ident, [map $_->[0], @{$bind}]);
+# my $col_sources = $self->_resolve_column_info($ident, @column_names);
sub _resolve_column_info {
my ($self, $ident, $colnames) = @_;
my ($alias2src, $root_alias) = $self->_resolve_ident_sources($ident);
my $sep = $self->_sql_maker_opts->{name_sep} || '.';
$sep = "\Q$sep\E";
- my (%return, %converted);
+ my (%return, %seen_cols);
+
+ # compile a global list of column names, to be able to properly
+ # disambiguate unqualified column names (if at all possible)
+ for my $alias (keys %$alias2src) {
+ my $rsrc = $alias2src->{$alias};
+ for my $colname ($rsrc->columns) {
+ push @{$seen_cols{$colname}}, $alias;
+ }
+ }
+
+ COLUMN:
foreach my $col (@$colnames) {
my ($alias, $colname) = $col =~ m/^ (?: ([^$sep]+) $sep)? (.+) $/x;
- # deal with unqualified cols - we assume the main alias for all
- # unqualified ones, ugly but can't think of anything better right now
- $alias ||= $root_alias;
+ unless ($alias) {
+ # see if the column was seen exactly once (so we know which rsrc it came from)
+ if ($seen_cols{$colname} and @{$seen_cols{$colname}} == 1) {
+ $alias = $seen_cols{$colname}[0];
+ }
+ else {
+ next COLUMN;
+ }
+ }
my $rsrc = $alias2src->{$alias};
- $return{$col} = $rsrc && { %{$rsrc->column_info($colname)}, -result_source => $rsrc };
+ $return{$col} = $rsrc && {
+ %{$rsrc->column_info($colname)},
+ -result_source => $rsrc,
+ -source_alias => $alias,
+ };
}
+
return \%return;
}
=cut
-sub sqlt_type { shift->dbh->{Driver}->{Name} }
+sub sqlt_type { shift->_get_dbh->{Driver}->{Name} }
=head2 bind_attribute_by_data_type
sub deployment_statements {
my ($self, $schema, $type, $version, $dir, $sqltargs) = @_;
- # Need to be connected to get the correct sqlt_type
- $self->ensure_connected() unless $type;
$type ||= $self->sqlt_type;
$version ||= $schema->schema_version || '1.x';
$dir ||= './';
return if $line =~ /^\s+$/; # skip whitespace only
$self->_query_start($line);
eval {
- $self->dbh->do($line); # shouldn't be using ->dbh ?
+ # do a dbh_do cycle here, as we need some error checking in
+ # place (even though we will ignore errors)
+ $self->dbh_do (sub { $_[1]->do($line) });
};
if ($@) {
carp qq{$@ (running "${line}")};
sub datetime_parser {
my $self = shift;
return $self->{datetime_parser} ||= do {
- $self->ensure_connected;
+ $self->_populate_dbh unless $self->_dbh;
$self->build_datetime_parser(@_);
};
}
sub DESTROY {
my $self = shift;
- return if !$self->_dbh;
- $self->_verify_pid;
+ $self->_verify_pid if $self->_dbh;
+
+ # some databases need this to stop spewing warnings
+ if (my $dbh = $self->_dbh) {
+ eval { $dbh->disconnect };
+ }
+
$self->_dbh(undef);
}
DBIx::Class can do some wonderful magic with handling exceptions,
disconnections, and transactions when you use C<< AutoCommit => 1 >>
-combined with C<txn_do> for transaction support.
+(the default) combined with C<txn_do> for transaction support.
If you set C<< AutoCommit => 0 >> in your connect info, then you are always
in an assumed transaction between commits, and you're telling us you'd
be with raw DBI.
-
=head1 AUTHORS
Matt S. Trout <mst@shadowcatsystems.co.uk>
projects / dbsrgits/DBIx-Class.git / blobdiff