use DBIx::Class::Exception;
use Carp::Clan qw/^DBIx::Class/;
-use Scalar::Util qw/weaken/;
+use Scalar::Util ();
use File::Spec;
use Sub::Name ();
-require Module::Find;
+use Module::Find();
use base qw/DBIx::Class/;
__PACKAGE__->load_namespaces();
package Library::Schema::Result::CD;
- use base qw/DBIx::Class/;
- __PACKAGE__->load_components(qw/Core/); # for example
+ use base qw/DBIx::Class::Core/;
+
+ __PACKAGE__->load_components(qw/InflateColumn::DateTime/); # for example
__PACKAGE__->table('cd');
# Elsewhere in your code:
$dsn,
$user,
$password,
- { AutoCommit => 0 },
+ { AutoCommit => 1 },
);
my $schema2 = Library::Schema->connect($coderef_returning_dbh);
With no arguments, this method uses L<Module::Find> to load all your
Result classes from a sub-namespace F<Result> under your Schema class'
-namespace. Eg. With a Schema of I<MyDB::Schema> all files in
+namespace, i.e. with a Schema of I<MyDB::Schema> all files in
I<MyDB::Schema::Result> are assumed to be Result classes.
It also finds all ResultSet classes in the namespace F<ResultSet> and
return $name;
}
+# Finds all modules in the supplied namespace, or if omitted in the
+# namespace of $class. Untaints all findings as they can be assumed
+# to be safe
+sub _findallmod {
+ my $proto = shift;
+ my $ns = shift || ref $proto || $proto;
+
+ my @mods = Module::Find::findallmod($ns);
+
+ # try to untaint module names. mods where this fails
+ # are left alone so we don't have to change the old behavior
+ no locale; # localized \w doesn't untaint expression
+ return map { $_ =~ m/^( (?:\w+::)* \w+ )$/x ? $1 : $_ } @mods;
+}
+
# returns a hash of $shortname => $fullname for every package
-# found in the given namespaces ($shortname is with the $fullname's
-# namespace stripped off)
+# found in the given namespaces ($shortname is with the $fullname's
+# namespace stripped off)
sub _map_namespaces {
my ($class, @namespaces) = @_;
push(
@results_hash,
map { (substr($_, length "${namespace}::"), $_) }
- Module::Find::findallmod($namespace)
+ $class->_findallmod($namespace)
);
}
@results_hash;
}
+# returns the result_source_instance for the passed class/object,
+# or dies with an informative message (used by load_namespaces)
+sub _ns_get_rsrc_instance {
+ my $class = shift;
+ my $rs = ref ($_[0]) || $_[0];
+
+ if ($rs->can ('result_source_instance') ) {
+ return $rs->result_source_instance;
+ }
+ else {
+ $class->throw_exception (
+ "Attempt to load_namespaces() class $rs failed - are you sure this is a real Result Class?"
+ );
+ }
+}
+
sub load_namespaces {
my ($class, %args) = @_;
local *Class::C3::reinitialize = sub { };
use warnings 'redefine';
- foreach my $result (keys %results) {
+ # ensure classes are loaded and attached in inheritance order
+ $class->ensure_class_loaded($_) foreach(values %results);
+ my %inh_idx;
+ my @subclass_last = sort {
+
+ ($inh_idx{$a} ||=
+ scalar @{mro::get_linear_isa( $results{$a} )}
+ )
+
+ <=>
+
+ ($inh_idx{$b} ||=
+ scalar @{mro::get_linear_isa( $results{$b} )}
+ )
+
+ } keys(%results);
+
+ foreach my $result (@subclass_last) {
my $result_class = $results{$result};
- $class->ensure_class_loaded($result_class);
my $rs_class = delete $resultsets{$result};
- my $rs_set = $result_class->resultset_class;
+ my $rs_set = $class->_ns_get_rsrc_instance ($result_class)->resultset_class;
+
if($rs_set && $rs_set ne 'DBIx::Class::ResultSet') {
if($rs_class && $rs_class ne $rs_set) {
- warn "We found ResultSet class '$rs_class' for '$result', but it seems "
+ carp "We found ResultSet class '$rs_class' for '$result', but it seems "
. "that you had already set '$result' to use '$rs_set' instead";
}
}
elsif($rs_class ||= $default_resultset_class) {
$class->ensure_class_loaded($rs_class);
- $result_class->resultset_class($rs_class);
+ $class->_ns_get_rsrc_instance ($result_class)->resultset_class($rs_class);
}
- my $source_name = $result_class->source_name || $result;
+ my $source_name = $class->_ns_get_rsrc_instance ($result_class)->source_name || $result;
push(@to_register, [ $source_name, $result_class ]);
}
}
foreach (sort keys %resultsets) {
- warn "load_namespaces found ResultSet class $_ with no "
+ carp "load_namespaces found ResultSet class $_ with no "
. 'corresponding Result class';
}
=back
-Alternative method to L</load_namespaces> which you should look at
-using if you can.
+L</load_classes> is an alternative method to L</load_namespaces>, both of
+which serve similar purposes, each with different advantages and disadvantages.
+In the general case you should use L</load_namespaces>, unless you need to
+be able to specify that only specific classes are loaded at runtime.
With no arguments, this method uses L<Module::Find> to find all classes under
the schema's namespace. Otherwise, this method loads the classes you specify
}
} else {
my @comp = map { substr $_, length "${class}::" }
- Module::Find::findallmod($class);
+ $class->_findallmod;
$comps_for{$class} = \@comp;
}
foreach my $prefix (keys %comps_for) {
foreach my $comp (@{$comps_for{$prefix}||[]}) {
my $comp_class = "${prefix}::${comp}";
- { # try to untaint module name. mods where this fails
- # are left alone so we don't have to change the old behavior
- no locale; # localized \w doesn't untaint expression
- if ( $comp_class =~ m/^( (?:\w+::)* \w+ )$/x ) {
- $comp_class = $1;
- }
- }
$class->ensure_class_loaded($comp_class);
my $snsub = $comp_class->can('source_name');
if(! $snsub ) {
- warn "Failed to load $comp_class. Can't find source_name method. Is $comp_class really a full DBIC result class? Fix it, move it elsewhere, or make your load_classes call more specific.";
+ carp "Failed to load $comp_class. Can't find source_name method. Is $comp_class really a full DBIC result class? Fix it, move it elsewhere, or make your load_classes call more specific.";
next;
}
$comp = $snsub->($comp_class) || $comp;
Set the storage class that will be instantiated when L</connect> is called.
If the classname starts with C<::>, the prefix C<DBIx::Class::Storage> is
-assumed by L</connect>.
+assumed by L</connect>.
You want to use this to set subclasses of L<DBIx::Class::Storage::DBI>
-in cases where the appropriate subclass is not autodetected, such as
-when dealing with MSSQL via L<DBD::Sybase>, in which case you'd set it
-to C<::DBI::Sybase::MSSQL>.
+in cases where the appropriate subclass is not autodetected.
If your storage type requires instantiation arguments, those are
defined as a second argument in the form of a hashref and the entire
general.
Note that C<connect_info> expects an arrayref of arguments, but
-C<connect> does not. C<connect> wraps it's arguments in an arrayref
+C<connect> does not. C<connect> wraps its arguments in an arrayref
before passing them to C<connect_info>.
+=head3 Overloading
+
+C<connect> is a convenience method. It is equivalent to calling
+$schema->clone->connection(@connectinfo). To write your own overloaded
+version, overload L</connection> instead.
+
=cut
sub connect { shift->clone->connection(@_) }
sub resultset {
my ($self, $moniker) = @_;
+ $self->throw_exception('resultset() expects a source name')
+ unless defined $moniker;
return $self->source($moniker)->resultset;
}
This interface is preferred over using the individual methods L</txn_begin>,
L</txn_commit>, and L</txn_rollback> below.
-WARNING: If you are connected with C<AutoCommit => 0> the transaction is
+WARNING: If you are connected with C<< AutoCommit => 0 >> the transaction is
considered nested, and you will still need to call L</txn_commit> to write your
-changes when appropriate. You will also want to connect with C<auto_savepoint =>
-1> to get partial rollback to work, if the storage driver for your database
+changes when appropriate. You will also want to connect with C<< auto_savepoint =>
+1 >> to get partial rollback to work, if the storage driver for your database
supports it.
-Connecting with C<AutoCommit => 1> is recommended.
+Connecting with C<< AutoCommit => 1 >> is recommended.
=cut
$self->storage->txn_do(@_);
}
-=head2 txn_scope_guard (EXPERIMENTAL)
+=head2 txn_scope_guard
Runs C<txn_scope_guard> on the schema's storage. See
L<DBIx::Class::Storage/txn_scope_guard>.
L<DBIx::Class::ResultSet/create>, and a arrayref of the resulting row
objects is returned.
-i.e.,
+e.g.
$schema->populate('Artist', [
[ qw/artistid name/ ],
[ 2, 'Indie Band' ],
...
]);
-
+
Since wantarray context is basically the same as looping over $rs->create(...)
you won't see any performance benefits and in this case the method is more for
convenience. Void context sends the column information directly to storage
data in-place on the Schema class. You should probably be calling
L</connect> to get a proper Schema object instead.
+=head3 Overloading
+
+Overload C<connection> to change the behaviour of C<connect>.
=cut
sub connection {
my ($self, @info) = @_;
return $self if !@info && $self->storage;
-
+
my ($storage_class, $args) = ref $self->storage_type ?
($self->_normalize_storage_type($self->storage_type),{}) : ($self->storage_type, {});
-
+
$storage_class = 'DBIx::Class::Storage'.$storage_class
if $storage_class =~ m/^::/;
- eval "require ${storage_class};";
+ eval { $self->ensure_class_loaded ($storage_class) };
$self->throw_exception(
"No arguments to load_classes and couldn't load ${storage_class} ($@)"
) if $@;
It also attaches a corresponding L<DBIx::Class::ResultSource> object to the
new $schema object. If C<$additional_base_class> is given, the new composed
-classes will inherit from first the corresponding classe from the current
+classes will inherit from first the corresponding class from the current
schema then the base class.
For example, for a schema with My::Schema::CD and My::Schema::Artist classes,
no strict 'refs';
no warnings 'redefine';
foreach my $meth (qw/class source resultset/) {
- *{"${target}::${meth}"} =
+ *{"${target}::${meth}"} = Sub::Name::subname "${target}::${meth}" =>
sub { shift->schema->$meth(@_) };
}
}
=over 4
-=item Arguments: $sqlt_args, $dir
+=item Arguments: \%sqlt_args, $dir
=back
Attempts to deploy the schema to the current storage using L<SQL::Translator>.
-See L<SQL::Translator/METHODS> for a list of values for C<$sqlt_args>. The most
-common value for this would be C<< { add_drop_table => 1, } >> to have the SQL
-produced include a DROP TABLE statement for each table created.
+See L<SQL::Translator/METHODS> for a list of values for C<\%sqlt_args>.
+The most common value for this would be C<< { add_drop_table => 1 } >>
+to have the SQL produced include a C<DROP TABLE> statement for each table
+created. For quoting purposes supply C<quote_table_names> and
+C<quote_field_names>.
Additionally, the DBIx::Class parser accepts a C<sources> parameter as a hash
ref or an array ref, containing a list of source to deploy. If present, then
=over 4
-=item Arguments: $rdbms_type, $sqlt_args, $dir
+=item Arguments: See L<DBIx::Class::Storage::DBI/deployment_statements>
=item Return value: $listofstatements
=back
-A convenient shortcut to storage->deployment_statements(). Returns the
-SQL statements used by L</deploy> and
-L<DBIx::Class::Schema::Storage/deploy>. C<$rdbms_type> provides the
-(optional) SQLT (not DBI) database driver name for which the SQL
-statements are produced. If not supplied, the type is determined by
-interrogating the current connection. The other two arguments are
-identical to those of L</deploy>.
+A convenient shortcut to
+C<< $self->storage->deployment_statements($self, @args) >>.
+Returns the SQL statements used by L</deploy> and
+L<DBIx::Class::Schema::Storage/deploy>.
=cut
$self->storage->deployment_statements($self, @_);
}
-=head2 create_ddl_dir (EXPERIMENTAL)
-
-=over 4
-
-=item Arguments: \@databases, $version, $directory, $preversion, $sqlt_args
-
-=back
-
-Creates an SQL file based on the Schema, for each of the specified
-database types, in the given directory. Given a previous version number,
-this will also create a file containing the ALTER TABLE statements to
-transform the previous schema into the current one. Note that these
-statements may contain DROP TABLE or DROP COLUMN statements that can
-potentially destroy data.
-
-The file names are created using the C<ddl_filename> method below, please
-override this method in your schema if you would like a different file
-name format. For the ALTER file, the same format is used, replacing
-$version in the name with "$preversion-$version".
-
-See L<DBIx::Class::Schema/deploy> for details of $sqlt_args.
-
-If no arguments are passed, then the following default values are used:
+=head2 create_ddl_dir
=over 4
-=item databases - ['MySQL', 'SQLite', 'PostgreSQL']
-
-=item version - $schema->schema_version
-
-=item directory - './'
-
-=item preversion - <none>
+=item Arguments: See L<DBIx::Class::Storage::DBI/create_ddl_dir>
=back
-Note that this feature is currently EXPERIMENTAL and may not work correctly
-across all databases, or fully handle complex relationships.
+A convenient shortcut to
+C<< $self->storage->create_ddl_dir($self, @args) >>.
-WARNING: Please check all SQL files created, before applying them.
+Creates an SQL file based on the Schema, for each of the specified
+database types, in the given directory.
=cut
You may override this method in your schema if you wish to use a different
format.
+ WARNING
+
+ Prior to DBIx::Class version 0.08100 this method had a different signature:
+
+ my $filename = $table->ddl_filename($type, $dir, $version, $preversion)
+
+ In recent versions variables $dir and $version were reversed in order to
+ bring the signature in line with other Schema/Storage methods. If you
+ really need to maintain backward compatibility, you can do the following
+ in any overriding methods:
+
+ ($dir, $version) = ($version, $dir) if ($DBIx::Class::VERSION < 0.08100);
+
=cut
sub ddl_filename {
$filename =~ s/::/-/g;
$filename = File::Spec->catfile($dir, "$filename-$version-$type.sql");
$filename =~ s/$version/$preversion-$version/ if($preversion);
-
+
return $filename;
}
Provided as the recommended way of thawing schema objects. You can call
C<Storable::thaw> directly if you wish, but the thawed objects will not have a
-reference to any schema, so are rather useless
+reference to any schema, so are rather useless.
=cut
=head2 freeze
-This doesn't actualy do anything more than call L<Storable/freeze>, it is just
-provided here for symetry.
+This doesn't actually do anything more than call L<Storable/freeze>, it is just
+provided here for symmetry.
=cut
=head2 dclone
-Recommeneded way of dcloning objects. This is needed to properly maintain
-references to the schema object (which itself is B<not> cloned.)
+=over 4
+
+=item Arguments: $object
+
+=item Return Value: dcloned $object
+
+=back
+
+Recommended way of dcloning L<DBIx::Class::Row> and L<DBIx::Class::ResultSet>
+objects so their references to the schema object
+(which itself is B<not> cloned) are properly maintained.
=cut
$self->_register_source(@_);
}
+=head2 unregister_source
+
+=over 4
+
+=item Arguments: $moniker
+
+=back
+
+Removes the L<DBIx::Class::ResultSource> from the schema for the given moniker.
+
+=cut
+
+sub unregister_source {
+ my $self = shift;
+
+ $self->_unregister_source(@_);
+}
+
=head2 register_extra_source
=over 4
sub _register_source {
my ($self, $moniker, $source, $params) = @_;
+ my $orig_source = $source;
+
$source = $source->new({ %$source, source_name => $moniker });
+ $source->schema($self);
+ Scalar::Util::weaken($source->{schema}) if ref($self);
+
+ my $rs_class = $source->result_class;
my %reg = %{$self->source_registrations};
$reg{$moniker} = $source;
$self->source_registrations(\%reg);
- $source->schema($self);
- weaken($source->{schema}) if ref($self);
return if ($params->{extra});
-
- if ($source->result_class) {
- my %map = %{$self->class_mappings};
- if (exists $map{$source->result_class}) {
- warn $source->result_class . ' already has a source, use register_extra_source for additional sources';
- }
- $map{$source->result_class} = $moniker;
- $self->class_mappings(\%map);
+ return unless defined($rs_class) && $rs_class->can('result_source_instance');
+
+ my %map = %{$self->class_mappings};
+ if (
+ exists $map{$rs_class}
+ and
+ $map{$rs_class} ne $moniker
+ and
+ $rs_class->result_source_instance ne $orig_source
+ ) {
+ carp "$rs_class already has a source, use register_extra_source for additional sources";
}
+ $map{$rs_class} = $moniker;
+ $self->class_mappings(\%map);
}
sub _unregister_source {
sub compose_connection {
my ($self, $target, @info) = @_;
- warn "compose_connection deprecated as of 0.08000"
+ carp "compose_connection deprecated as of 0.08000"
unless ($INC{"DBIx/Class/CDBICompat.pm"} || $warn++);
my $base = 'DBIx::Class::ResultSetProxy';
$self->throw_exception
("No arguments to load_classes and couldn't load ${base} ($@)")
if $@;
-
+
if ($self eq $target) {
# Pathological case, largely caused by the docs on early C::M::DBIC::Plain
foreach my $moniker ($self->sources) {
$self->connection(@info);
return $self;
}
-
+
my $schema = $self->compose_namespace($target, $base);
{
no strict 'refs';
my $name = join '::', $target, 'schema';
*$name = Sub::Name::subname $name, sub { $schema };
}
-
+
$schema->connection(@info);
foreach my $moniker ($schema->sources) {
my $source = $schema->source($moniker);
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