%extra_attributes,
}];
+ $connect_info_args = [{
+ dbh_maker => sub { DBI->connect (...) },
+ %dbi_attributes,
+ %extra_attributes,
+ }];
+
This is particularly useful for L<Catalyst> based applications, allowing the
following config (L<Config::General> style):
</connect_info>
</Model::DB>
+The C<dsn>/C<user>/C<password> combination can be substituted by the
+C<dbh_maker> key whose value is a coderef that returns a connected
+L<DBI database handle|DBI/connect>
+
=back
Please note that the L<DBI> docs recommend that you always explicitly
# Connect via subref
->connect_info([ sub { DBI->connect(...) } ]);
+ # Connect via subref in hashref
+ ->connect_info([{
+ dbh_maker => sub { DBI->connect(...) },
+ on_connect_do => 'alter session ...',
+ }]);
+
# A bit more complicated
->connect_info(
[
elsif (ref $args[0] eq 'HASH') { # single hashref (i.e. Catalyst config)
%attrs = %{$args[0]};
@args = ();
- for (qw/password user dsn/) {
- unshift @args, delete $attrs{$_};
+ if (my $code = delete $attrs{dbh_maker}) {
+ @args = $code;
+
+ my @ignored = grep { delete $attrs{$_} } (qw/dsn user password/);
+ if (@ignored) {
+ carp sprintf (
+ 'Attribute(s) %s in connect_info were ignored, as they can not be applied '
+ . "to the result of 'dbh_maker'",
+
+ join (', ', map { "'$_'" } (@ignored) ),
+ );
+ }
+ }
+ else {
+ @args = delete @attrs{qw/dsn user password/};
}
}
else { # otherwise assume dsn/user/password + \%attrs + \%extra_attrs
$self->_do_connection_actions(disconnect_call_ => $_) for @actions;
- $self->_dbh->rollback unless $self->_dbh_autocommit;
+ $self->_dbh_rollback unless $self->_dbh_autocommit;
+
$self->_dbh->disconnect;
$self->_dbh(undef);
$self->{_dbh_gen}++;
if($self->{transaction_depth} == 0) {
$self->debugobj->txn_begin()
if $self->debug;
-
- # 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) {
+ $self->_dbh_begin_work;
+ }
+ elsif ($self->auto_savepoint) {
$self->svp_begin;
}
$self->{transaction_depth}++;
}
+sub _dbh_begin_work {
+ my $self = shift;
+
+ # if the user is utilizing txn_do - good for him, otherwise we need to
+ # ensure that the $dbh is healthy on BEGIN.
+ # We do this via ->dbh_do instead of ->dbh, so that the ->dbh "ping"
+ # will be replaced by a failure of begin_work itself (which will be
+ # then retried on reconnect)
+ if ($self->{_in_dbh_do}) {
+ $self->_dbh->begin_work;
+ } else {
+ $self->dbh_do(sub { $_[1]->begin_work });
+ }
+}
+
sub txn_commit {
my $self = shift;
if ($self->{transaction_depth} == 1) {
my $dbh = $self->_dbh;
$self->debugobj->txn_commit()
if ($self->debug);
- $dbh->commit;
+ $self->_dbh_commit;
$self->{transaction_depth} = 0
if $self->_dbh_autocommit;
}
}
}
+sub _dbh_commit {
+ my $self = shift;
+ $self->_dbh->commit;
+}
+
sub txn_rollback {
my $self = shift;
my $dbh = $self->_dbh;
if ($self->debug);
$self->{transaction_depth} = 0
if $self->_dbh_autocommit;
- $dbh->rollback;
+ $self->_dbh_rollback;
}
elsif($self->{transaction_depth} > 1) {
$self->{transaction_depth}--;
}
}
+sub _dbh_rollback {
+ my $self = shift;
+ $self->_dbh->rollback;
+}
+
# This used to be the top-half of _execute. It was split out to make it
# easier to override in NoBindVars without duping the rest. It takes up
# all of _execute's args, and emits $sql, @bind.
sub _execute {
my $self = shift;
- $self->dbh_do('_dbh_execute', @_)
+ $self->dbh_do('_dbh_execute', @_); # retry over disconnects
}
sub insert {
}
sub update {
- my $self = shift @_;
- my $source = shift @_;
- $self->_determine_driver;
+ my ($self, $source, @args) = @_;
+
+# redispatch to update method of storage we reblessed into, if necessary
+ if (not $self->_driver_determined) {
+ $self->_determine_driver;
+ goto $self->can('update');
+ }
+
my $bind_attributes = $self->source_bind_attributes($source);
- return $self->_execute('update' => [], $source, $bind_attributes, @_);
+ return $self->_execute('update' => [], $source, $bind_attributes, @args);
}
return @pcols ? \@pcols : [ 1 ];
}
+#
+# Returns an ordered list of column names before they are used
+# in a SELECT statement. By default simply returns the list
+# passed in.
+#
+# This may be overridden in a specific storage when there are
+# requirements such as moving BLOB columns to the end of the
+# SELECT list.
+sub _order_select_columns {
+ #my ($self, $source, $columns) = @_;
+ return @{$_[2]};
+}
sub source_bind_attributes {
my ($self, $source) = @_;
sub sth {
my ($self, $sql) = @_;
- $self->dbh_do('_dbh_sth', $sql);
+ $self->dbh_do('_dbh_sth', $sql); # retry over disconnects
}
sub _dbh_columns_info_for {
sub columns_info_for {
my ($self, $table) = @_;
- $self->dbh_do('_dbh_columns_info_for', $table);
+ $self->_dbh_columns_info_for ($self->_get_dbh, $table);
}
=head2 last_insert_id
sub last_insert_id {
my $self = shift;
- $self->dbh_do('_dbh_last_insert_id', @_);
+ $self->_dbh_last_insert_id ($self->_dbh, @_);
}
=head2 _native_data_type
return undef
}
+# Check if placeholders are supported at all
+sub _placeholders_supported {
+ my $self = shift;
+ my $dbh = $self->_get_dbh;
+
+ # some drivers provide a $dbh attribute (e.g. Sybase and $dbh->{syb_dynamic_supported})
+ # but it is inaccurate more often than not
+ eval {
+ local $dbh->{PrintError} = 0;
+ local $dbh->{RaiseError} = 1;
+ $dbh->do('select ?', {}, 1);
+ };
+ return $@ ? 0 : 1;
+}
+
+# Check if placeholders bound to non-string types throw exceptions
+#
+sub _typeless_placeholders_supported {
+ my $self = shift;
+ my $dbh = $self->_get_dbh;
+
+ eval {
+ local $dbh->{PrintError} = 0;
+ local $dbh->{RaiseError} = 1;
+ # this specifically tests a bind that is NOT a string
+ $dbh->do('select 1 where 1 = ?', {}, 1);
+ };
+ return $@ ? 0 : 1;
+}
+
=head2 sqlt_type
Returns the database driver name.
projects / dbsrgits/DBIx-Class-Historic.git / blobdiff