use DBIx::Class::ResultSourceHandle;
use DBIx::Class::Exception;
-use Carp::Clan qw/^DBIx::Class/;
+use DBIx::Class::Carp;
+use Devel::GlobalDestruction;
use Try::Tiny;
use List::Util 'first';
-use Scalar::Util qw/weaken isweak/;
-use Storable qw/nfreeze thaw/;
+use Scalar::Util qw/blessed weaken isweak/;
use namespace::clean;
use base qw/DBIx::Class/;
-__PACKAGE__->mk_group_accessors('simple' => qw/_ordered_columns
- _columns _primaries _unique_constraints name resultset_attributes
- from _relationships column_info_from_storage source_info
- source_name sqlt_deploy_callback/);
+__PACKAGE__->mk_group_accessors(simple => qw/
+ source_name name source_info
+ _ordered_columns _columns _primaries _unique_constraints
+ _relationships resultset_attributes
+ column_info_from_storage
+/);
-__PACKAGE__->mk_group_accessors('component_class' => qw/resultset_class
- result_class/);
+__PACKAGE__->mk_group_accessors(component_class => qw/
+ resultset_class
+ result_class
+/);
+
+__PACKAGE__->mk_classdata( sqlt_deploy_callback => 'default_sqlt_deploy_hook' );
=head1 NAME
# Create a table based result source, in a result class.
- package MyDB::Schema::Result::Artist;
+ package MyApp::Schema::Result::Artist;
use base qw/DBIx::Class::Core/;
__PACKAGE__->table('artist');
__PACKAGE__->add_columns(qw/ artistid name /);
__PACKAGE__->set_primary_key('artistid');
- __PACKAGE__->has_many(cds => 'MyDB::Schema::Result::CD');
+ __PACKAGE__->has_many(cds => 'MyApp::Schema::Result::CD');
1;
# Create a query (view) based result source, in a result class
- package MyDB::Schema::Result::Year2000CDs;
+ package MyApp::Schema::Result::Year2000CDs;
use base qw/DBIx::Class::Core/;
__PACKAGE__->load_components('InflateColumn::DateTime');
$schema->source($source_name);
-=item From a Row object:
+=item From a Result object:
$row->result_source;
$new->{_relationships} = { %{$new->{_relationships}||{}} };
$new->{name} ||= "!!NAME NOT SET!!";
$new->{_columns_info_loaded} ||= 0;
- $new->{sqlt_deploy_callback} ||= "default_sqlt_deploy_hook";
return $new;
}
=item Arguments: @columns
-=item Return value: The ResultSource object
+=item Return Value: L<$result_source|/new>
=back
calls of this method will add more columns, not replace them.
The column names given will be created as accessor methods on your
-L<DBIx::Class::Row> objects. You can change the name of the accessor
+L<Result|DBIx::Class::Manual::ResultClass> objects. You can change the name of the accessor
by supplying an L</accessor> in the column_info hash.
If a column name beginning with a plus sign ('+col1') is provided, the
will attempt to retrieve the name of the sequence from the database
automatically.
+=item retrieve_on_insert
+
+ { retrieve_on_insert => 1 }
+
+For every column where this is set to true, DBIC will retrieve the RDBMS-side
+value upon a new row insertion (normally only the autoincrement PK is
+retrieved on insert). C<INSERT ... RETURNING> is used automatically if
+supported by the underlying storage, otherwise an extra SELECT statement is
+executed to retrieve the missing data.
+
=item auto_nextval
+ { auto_nextval => 1 }
+
Set this to a true value for a column whose value is retrieved automatically
from a sequence or function (if supported by your Storage driver.) For a
sequence, if you do not use a trigger to get the nextval, you have to set the
=item Arguments: $colname, \%columninfo?
-=item Return value: 1/0 (true/false)
+=item Return Value: 1/0 (true/false)
=back
=item Arguments: $colname
-=item Return value: 1/0 (true/false)
+=item Return Value: 1/0 (true/false)
=back
=item Arguments: $colname
-=item Return value: Hashref of info
+=item Return Value: Hashref of info
=back
=over
-=item Arguments: None
+=item Arguments: none
-=item Return value: Ordered list of column names
+=item Return Value: Ordered list of column names
=back
=item Arguments: \@colnames ?
-=item Return value: Hashref of column name/info pairs
+=item Return Value: Hashref of column name/info pairs
=back
my $columns_info = $source->columns_info;
Like L</column_info> but returns information for the requested columns. If
-the optional column-list arrayref is ommitted it returns info on all columns
+the optional column-list arrayref is omitted it returns info on all columns
currently defined on the ResultSource via L</add_columns>.
=cut
=item Arguments: @colnames
-=item Return value: undefined
+=item Return Value: not defined
=back
=item Arguments: $colname
-=item Return value: undefined
+=item Return Value: not defined
=back
=item Arguments: @cols
-=item Return value: undefined
+=item Return Value: not defined
=back
=over 4
-=item Arguments: None
+=item Arguments: none
-=item Return value: Ordered list of primary column names
+=item Return Value: Ordered list of primary column names
=back
=item Arguments: $sequence_name
-=item Return value: undefined
+=item Return Value: not defined
=back
my ($self,$seq) = @_;
my @pks = $self->primary_columns
- or next;
+ or return;
$_->{sequence} = $seq
for values %{ $self->columns_info (\@pks) };
=item Arguments: $name?, \@colnames
-=item Return value: undefined
+=item Return Value: not defined
=back
=item Arguments: @constraints
-=item Return value: undefined
+=item Return Value: not defined
=back
=item Arguments: \@colnames
-=item Return value: Constraint name
+=item Return Value: Constraint name
=back
=over 4
-=item Arguments: None
+=item Arguments: none
-=item Return value: Hash of unique constraint data
+=item Return Value: Hash of unique constraint data
=back
=over 4
-=item Arguments: None
+=item Arguments: none
-=item Return value: Unique constraint names
+=item Return Value: Unique constraint names
=back
=item Arguments: $constraintname
-=item Return value: List of constraint columns
+=item Return Value: List of constraint columns
=back
=over
-=item Arguments: $callback
+=item Arguments: $callback_name | \&callback_code
+
+=item Return Value: $callback_name | \&callback_code
=back
__PACKAGE__->sqlt_deploy_callback('mycallbackmethod');
+ or
+
+ __PACKAGE__->sqlt_deploy_callback(sub {
+ my ($source_instance, $sqlt_table) = @_;
+ ...
+ } );
+
An accessor to set a callback to be called during deployment of
the schema via L<DBIx::Class::Schema/create_ddl_dir> or
L<DBIx::Class::Schema/deploy>.
The callback can be set as either a code reference or the name of a
method in the current result class.
-If not set, the L</default_sqlt_deploy_hook> is called.
+Defaults to L</default_sqlt_deploy_hook>.
Your callback will be passed the $source object representing the
ResultSource instance being deployed, and the
=head2 default_sqlt_deploy_hook
-=over
-
-=item Arguments: $source, $sqlt_table
-
-=item Return value: undefined
-
-=back
-
-This is the sensible default for L</sqlt_deploy_callback>.
-
-If a method named C<sqlt_deploy_hook> exists in your Result class, it
-will be called and passed the current C<$source> and the
-C<$sqlt_table> being deployed.
+This is the default deploy hook implementation which checks if your
+current Result class has a C<sqlt_deploy_hook> method, and if present
+invokes it B<on the Result class directly>. This is to preserve the
+semantics of C<sqlt_deploy_hook> which was originally designed to expect
+the Result class name and the
+L<$sqlt_table instance|SQL::Translator::Schema::Table> of the table being
+deployed.
=cut
}
}
+=head2 result_class
+
+=over 4
+
+=item Arguments: $classname
+
+=item Return Value: $classname
+
+=back
+
+ use My::Schema::ResultClass::Inflator;
+ ...
+
+ use My::Schema::Artist;
+ ...
+ __PACKAGE__->result_class('My::Schema::ResultClass::Inflator');
+
+Set the default result class for this source. You can use this to create
+and use your own result inflator. See L<DBIx::Class::ResultSet/result_class>
+for more details.
+
+Please note that setting this to something like
+L<DBIx::Class::ResultClass::HashRefInflator> will make every result unblessed
+and make life more difficult. Inflators like those are better suited to
+temporary usage via L<DBIx::Class::ResultSet/result_class>.
+
=head2 resultset
=over 4
-=item Arguments: None
+=item Arguments: none
-=item Return value: $resultset
+=item Return Value: L<$resultset|DBIx::Class::ResultSet>
=back
=item Arguments: $classname
-=item Return value: $classname
+=item Return Value: $classname
=back
=over 4
-=item Arguments: \%attrs
+=item Arguments: L<\%attrs|DBIx::Class::ResultSet/ATTRIBUTES>
-=item Return value: \%attrs
+=item Return Value: L<\%attrs|DBIx::Class::ResultSet/ATTRIBUTES>
=back
$source->resultset_attributes({ order_by => [ 'id' ] });
Store a collection of resultset attributes, that will be set on every
-L<DBIx::Class::ResultSet> produced from this result source. For a full
-list see L<DBIx::Class::ResultSet/ATTRIBUTES>.
+L<DBIx::Class::ResultSet> produced from this result source.
+
+B<CAVEAT>: C<resultset_attributes> comes with its own set of issues and
+bugs! While C<resultset_attributes> isn't deprecated per se, its usage is
+not recommended!
+
+Since relationships use attributes to link tables together, the "default"
+attributes you set may cause unpredictable and undesired behavior. Furthermore,
+the defaults cannot be turned off, so you are stuck with them.
+
+In most cases, what you should actually be using are project-specific methods:
+
+ package My::Schema::ResultSet::Artist;
+ use base 'DBIx::Class::ResultSet';
+ ...
+
+ # BAD IDEA!
+ #__PACKAGE__->resultset_attributes({ prefetch => 'tracks' });
+
+ # GOOD IDEA!
+ sub with_tracks { shift->search({}, { prefetch => 'tracks' }) }
+
+ # in your code
+ $schema->resultset('Artist')->with_tracks->...
+
+This gives you the flexibility of not using it when you don't need it.
+
+For more complex situations, another solution would be to use a virtual view
+via L<DBIx::Class::ResultSource::View>.
=cut
);
}
+=head2 name
+
+=over 4
+
+=item Arguments: none
+
+=item Result value: $name
+
+=back
+
+Returns the name of the result source, which will typically be the table
+name. This may be a scalar reference if the result source has a non-standard
+name.
+
=head2 source_name
=over 4
=over 4
-=item Arguments: None
+=item Arguments: none
-=item Return value: FROM clause
+=item Return Value: FROM clause
=back
retrieval from this source. In the case of a database, the required FROM
clause contents.
+=cut
+
+sub from { die 'Virtual method!' }
+
=head2 schema
=over 4
-=item Arguments: $schema
+=item Arguments: L<$schema?|DBIx::Class::Schema>
-=item Return value: A schema object
+=item Return Value: L<$schema|DBIx::Class::Schema>
=back
=over 4
-=item Arguments: None
+=item Arguments: none
-=item Return value: A Storage object
+=item Return Value: L<$storage|DBIx::Class::Storage>
=back
$source->storage->debug(1);
-Returns the storage handle for the current schema.
-
-See also: L<DBIx::Class::Storage>
+Returns the L<storage handle|DBIx::Class::Storage> for the current schema.
=cut
=over 4
-=item Arguments: $relname, $related_source_name, \%cond, [ \%attrs ]
+=item Arguments: $rel_name, $related_source_name, \%cond, \%attrs?
-=item Return value: 1/true if it succeeded
+=item Return Value: 1/true if it succeeded
=back
- $source->add_relationship('relname', 'related_source', $cond, $attrs);
+ $source->add_relationship('rel_name', 'related_source', $cond, $attrs);
L<DBIx::Class::Relationship> describes a series of methods which
create pre-defined useful types of relationships. Look there first
=over 4
-=item Arguments: None
+=item Arguments: none
-=item Return value: List of relationship names
+=item Return Value: L<@rel_names|DBIx::Class::Relationship>
=back
=over 4
-=item Arguments: $relname
+=item Arguments: L<$rel_name|DBIx::Class::Relationship>
-=item Return value: Hashref of relation data,
+=item Return Value: L<\%rel_data|DBIx::Class::Relationship::Base/add_relationship>
=back
Returns a hash of relationship information for the specified relationship
-name. The keys/values are as specified for L</add_relationship>.
+name. The keys/values are as specified for L<DBIx::Class::Relationship::Base/add_relationship>.
=cut
=over 4
-=item Arguments: $rel
+=item Arguments: L<$rel_name|DBIx::Class::Relationship>
-=item Return value: 1/0 (true/false)
+=item Return Value: 1/0 (true/false)
=back
=over 4
-=item Arguments: $relname
+=item Arguments: L<$rel_name|DBIx::Class::Relationship>
-=item Return value: Hashref of relationship data
+=item Return Value: L<\%rel_data|DBIx::Class::Relationship::Base/add_relationship>
=back
sub reverse_relationship_info {
my ($self, $rel) = @_;
- my $rel_info = $self->relationship_info($rel);
+
+ my $rel_info = $self->relationship_info($rel)
+ or $self->throw_exception("No such relationship '$rel'");
+
my $ret = {};
return $ret unless ((ref $rel_info->{cond}) eq 'HASH');
- my @cond = keys(%{$rel_info->{cond}});
- my @refkeys = map {/^\w+\.(\w+)$/} @cond;
- my @keys = map {$rel_info->{cond}->{$_} =~ /^\w+\.(\w+)$/} @cond;
+ my $stripped_cond = $self->__strip_relcond ($rel_info->{cond});
- # Get the related result source for this relationship
- my $othertable = $self->related_source($rel);
+ my $rsrc_schema_moniker = $self->source_name
+ if try { $self->schema };
+
+ # this may be a partial schema or something else equally esoteric
+ my $other_rsrc = try { $self->related_source($rel) }
+ or return $ret;
# Get all the relationships for that source that related to this source
# whose foreign column set are our self columns on $rel and whose self
- # columns are our foreign columns on $rel.
- my @otherrels = $othertable->relationships();
- my $otherrelationship;
- foreach my $otherrel (@otherrels) {
- # this may be a partial schema with the related source not being
- # available at all
- my $back = try { $othertable->related_source($otherrel) } or next;
-
- # did we get back to ourselves?
- next unless $back->source_name eq $self->source_name;
-
- my $otherrel_info = $othertable->relationship_info($otherrel);
- my @othertestconds;
-
- if (ref $otherrel_info->{cond} eq 'HASH') {
- @othertestconds = ($otherrel_info->{cond});
- }
- elsif (ref $otherrel_info->{cond} eq 'ARRAY') {
- @othertestconds = @{$otherrel_info->{cond}};
+ # columns are our foreign columns on $rel
+ foreach my $other_rel ($other_rsrc->relationships) {
+
+ # only consider stuff that points back to us
+ # "us" here is tricky - if we are in a schema registration, we want
+ # to use the source_names, otherwise we will use the actual classes
+
+ # the schema may be partial
+ my $roundtrip_rsrc = try { $other_rsrc->related_source($other_rel) }
+ or next;
+
+ if ($rsrc_schema_moniker and try { $roundtrip_rsrc->schema } ) {
+ next unless $rsrc_schema_moniker eq $roundtrip_rsrc->source_name;
}
else {
- next;
+ next unless $self->result_class eq $roundtrip_rsrc->result_class;
}
- foreach my $othercond (@othertestconds) {
- my @other_cond = keys(%$othercond);
- my @other_refkeys = map {/^\w+\.(\w+)$/} @other_cond;
- my @other_keys = map {$othercond->{$_} =~ /^\w+\.(\w+)$/} @other_cond;
- next if (!$self->_compare_relationship_keys(\@refkeys, \@other_keys) ||
- !$self->_compare_relationship_keys(\@other_refkeys, \@keys));
- $ret->{$otherrel} = $otherrel_info;
- }
+ my $other_rel_info = $other_rsrc->relationship_info($other_rel);
+
+ # this can happen when we have a self-referential class
+ next if $other_rel_info eq $rel_info;
+
+ next unless ref $other_rel_info->{cond} eq 'HASH';
+ my $other_stripped_cond = $self->__strip_relcond($other_rel_info->{cond});
+
+ $ret->{$other_rel} = $other_rel_info if (
+ $self->_compare_relationship_keys (
+ [ keys %$stripped_cond ], [ values %$other_stripped_cond ]
+ )
+ and
+ $self->_compare_relationship_keys (
+ [ values %$stripped_cond ], [ keys %$other_stripped_cond ]
+ )
+ );
}
+
return $ret;
}
+# all this does is removes the foreign/self prefix from a condition
+sub __strip_relcond {
+ +{
+ map
+ { map { /^ (?:foreign|self) \. (\w+) $/x } ($_, $_[1]{$_}) }
+ keys %{$_[1]}
+ }
+}
+
sub compare_relationship_keys {
carp 'compare_relationship_keys is a private method, stop calling it';
my $self = shift;
# Returns true if both sets of keynames are the same, false otherwise.
sub _compare_relationship_keys {
- my ($self, $keys1, $keys2) = @_;
-
- # Make sure every keys1 is in keys2
- my $found;
- foreach my $key (@$keys1) {
- $found = 0;
- foreach my $prim (@$keys2) {
- if ($prim eq $key) {
- $found = 1;
- last;
- }
- }
- last unless $found;
- }
+# my ($self, $keys1, $keys2) = @_;
+ return
+ join ("\x00", sort @{$_[1]})
+ eq
+ join ("\x00", sort @{$_[2]})
+ ;
+}
- # Make sure every key2 is in key1
- if ($found) {
- foreach my $prim (@$keys2) {
- $found = 0;
- foreach my $key (@$keys1) {
- if ($prim eq $key) {
- $found = 1;
- last;
- }
- }
- last unless $found;
+# optionally takes either an arrayref of column names, or a hashref of already
+# retrieved colinfos
+# returns an arrayref of column names of the shortest unique constraint
+# (matching some of the input if any), giving preference to the PK
+sub _identifying_column_set {
+ my ($self, $cols) = @_;
+
+ my %unique = $self->unique_constraints;
+ my $colinfos = ref $cols eq 'HASH' ? $cols : $self->columns_info($cols||());
+
+ # always prefer the PK first, and then shortest constraints first
+ USET:
+ for my $set (delete $unique{primary}, sort { @$a <=> @$b } (values %unique) ) {
+ next unless $set && @$set;
+
+ for (@$set) {
+ next USET unless ($colinfos->{$_} && !$colinfos->{$_}{is_nullable} );
}
+
+ # copy so we can mangle it at will
+ return [ @$set ];
}
- return $found;
+ return undef;
}
# Returns the {from} structure used to express JOIN conditions
$jpath = [@$jpath]; # copy
- if (not defined $join) {
+ if (not defined $join or not length $join) {
return ();
}
elsif (ref $join eq 'ARRAY') {
-alias => $as,
-relation_chain_depth => $seen->{-relation_chain_depth} || 0,
},
- $self->_resolve_condition($rel_info->{cond}, $as, $alias, $join) ];
+ scalar $self->_resolve_condition($rel_info->{cond}, $as, $alias, $join)
+ ];
}
}
# having already been inserted. Takes the name of the relationship and a
# hashref of columns of the related object.
sub _pk_depends_on {
- my ($self, $relname, $rel_data) = @_;
+ my ($self, $rel_name, $rel_data) = @_;
- my $relinfo = $self->relationship_info($relname);
+ my $relinfo = $self->relationship_info($rel_name);
# don't assume things if the relationship direction is specified
return $relinfo->{attrs}{is_foreign_key_constraint}
# assume anything that references our PK probably is dependent on us
# rather than vice versa, unless the far side is (a) defined or (b)
# auto-increment
- my $rel_source = $self->related_source($relname);
+ my $rel_source = $self->related_source($rel_name);
foreach my $p ($self->primary_columns) {
if (exists $keyhash->{$p}) {
$self->_resolve_condition (@_);
}
-# Resolves the passed condition to a concrete query fragment. If given an alias,
-# returns a join condition; if given an object, inverts that object to produce
-# a related conditional from that object.
-our $UNRESOLVABLE_CONDITION = \'1 = 0';
+our $UNRESOLVABLE_CONDITION = \ '1 = 0';
+# Resolves the passed condition to a concrete query fragment and a flag
+# indicating whether this is a cross-table condition. Also an optional
+# list of non-triviail values (notmally conditions) returned as a part
+# of a joinfree condition hash
sub _resolve_condition {
- my ($self, $cond, $as, $for, $rel) = @_;
+ my ($self, $cond, $as, $for, $rel_name) = @_;
+
+ my $obj_rel = !!blessed $for;
+
if (ref $cond eq 'CODE') {
+ my $relalias = $obj_rel ? 'me' : $as;
+
+ my ($crosstable_cond, $joinfree_cond) = $cond->({
+ self_alias => $obj_rel ? $as : $for,
+ foreign_alias => $relalias,
+ self_resultsource => $self,
+ foreign_relname => $rel_name || ($obj_rel ? $as : $for),
+ self_rowobj => $obj_rel ? $for : undef
+ });
- # heuristic for the actual relname
- if (! defined $rel) {
- if (!ref $as) {
- $rel = $as;
+ my $cond_cols;
+ if ($joinfree_cond) {
+
+ # FIXME sanity check until things stabilize, remove at some point
+ $self->throw_exception (
+ "A join-free condition returned for relationship '$rel_name' without a row-object to chain from"
+ ) unless $obj_rel;
+
+ # FIXME another sanity check
+ if (
+ ref $joinfree_cond ne 'HASH'
+ or
+ first { $_ !~ /^\Q$relalias.\E.+/ } keys %$joinfree_cond
+ ) {
+ $self->throw_exception (
+ "The join-free condition returned for relationship '$rel_name' must be a hash "
+ .'reference with all keys being valid columns on the related result source'
+ );
}
- elsif (!ref $for) {
- $rel = $for;
+
+ # normalize
+ for (values %$joinfree_cond) {
+ $_ = $_->{'='} if (
+ ref $_ eq 'HASH'
+ and
+ keys %$_ == 1
+ and
+ exists $_->{'='}
+ );
}
- }
- if (! defined $rel) {
- $self->throw_exception ('Unable to determine relationship name for condition resolution');
- }
+ # see which parts of the joinfree cond are conditionals
+ my $relcol_list = { map { $_ => 1 } $self->related_source($rel_name)->columns };
- return $cond->({
- self_alias => ref $for ? $as : $for,
- foreign_alias => ref $for ? $self->related_source($rel)->resultset->current_source_alias : $as,
- self_resultsource => $self,
- foreign_relname => $rel,
- self_rowobj => ref $for ? $for : undef
- });
+ for my $c (keys %$joinfree_cond) {
+ my ($colname) = $c =~ /^ (?: \Q$relalias.\E )? (.+)/x;
- } elsif (ref $cond eq 'HASH') {
+ unless ($relcol_list->{$colname}) {
+ push @$cond_cols, $colname;
+ next;
+ }
+
+ if (
+ ref $joinfree_cond->{$c}
+ and
+ ref $joinfree_cond->{$c} ne 'SCALAR'
+ and
+ ref $joinfree_cond->{$c} ne 'REF'
+ ) {
+ push @$cond_cols, $colname;
+ next;
+ }
+ }
+
+ return wantarray ? ($joinfree_cond, 0, $cond_cols) : $joinfree_cond;
+ }
+ else {
+ return wantarray ? ($crosstable_cond, 1) : $crosstable_cond;
+ }
+ }
+ elsif (ref $cond eq 'HASH') {
my %ret;
foreach my $k (keys %{$cond}) {
my $v = $cond->{$k};
} elsif (!defined $as) { # undef, i.e. "no reverse object"
$ret{$v} = undef;
} else {
- $ret{"${as}.${k}"} = "${for}.${v}";
+ $ret{"${as}.${k}"} = { -ident => "${for}.${v}" };
}
}
- return \%ret;
- } elsif (ref $cond eq 'ARRAY') {
- return [ map { $self->_resolve_condition($_, $as, $for) } @$cond ];
- } else {
- $self->throw_exception ("Can't handle condition $cond yet :(");
+
+ return wantarray
+ ? ( \%ret, ($obj_rel || !defined $as || ref $as) ? 0 : 1 )
+ : \%ret
+ ;
+ }
+ elsif (ref $cond eq 'ARRAY') {
+ my (@ret, $crosstable);
+ for (@$cond) {
+ my ($cond, $crosstab) = $self->_resolve_condition($_, $as, $for, $rel_name);
+ push @ret, $cond;
+ $crosstable ||= $crosstab;
+ }
+ return wantarray ? (\@ret, $crosstable) : \@ret;
+ }
+ else {
+ $self->throw_exception ("Can't handle condition $cond for relationship '$rel_name' yet :(");
}
}
-
# Accepts one or more relationships for the current source and returns an
# array of column names for each of those relationships. Column names are
# prefixed relative to the current source, in accordance with where they appear
# in the supplied relationships.
-
sub _resolve_prefetch {
my ($self, $pre, $alias, $alias_map, $order, $collapse, $pref_path) = @_;
$pref_path ||= [];
- if (not defined $pre) {
+ if (not defined $pre or not length $pre) {
return ();
}
elsif( ref $pre eq 'ARRAY' ) {
if ($rel_info->{attrs}{accessor} && $rel_info->{attrs}{accessor} eq 'multi') {
$self->throw_exception(
"Can't prefetch has_many ${pre} (join cond too complex)")
- unless (ref($rel_info->{cond}) eq 'HASH' || ref($rel_info->{cond}) eq 'CODE');
+ unless ref($rel_info->{cond}) eq 'HASH';
my $dots = @{[$as_prefix =~ m/\./g]} + 1; # +1 to match the ".${as_prefix}"
if (my ($fail) = grep { @{[$_ =~ m/\./g]} == $dots }
$collapse->{".${as_prefix}${pre}"} = [ $rel_source->_pri_cols ];
# action at a distance. prepending the '.' allows simpler code
# in ResultSet->_collapse_result
-
- if (ref $rel_info->{cond} eq 'HASH') {
- my @key = map { (/^foreign\.(.+)$/ ? ($1) : ()); }
- keys %{$rel_info->{cond}};
- push @$order, map { "${as}.$_" } @key;
- } else { # ref $rel_info->{cond} eq 'CODE'
- # call the cond to get the keys...
- my $cond_data = $rel_info->{cond}->({ foreign_alias => $as,
- self_alias => $alias });
- push @$order, keys %$cond_data;
- }
+ my @key = map { (/^foreign\.(.+)$/ ? ($1) : ()); }
+ keys %{$rel_info->{cond}};
+ push @$order, map { "${as}.$_" } @key;
if (my $rel_order = $rel_info->{attrs}{order_by}) {
# this is kludgy and incomplete, I am well aware
=over 4
-=item Arguments: $relname
+=item Arguments: $rel_name
-=item Return value: $source
+=item Return Value: $source
=back
if( !$self->has_relationship( $rel ) ) {
$self->throw_exception("No such relationship '$rel' on " . $self->source_name);
}
- return $self->schema->source($self->relationship_info($rel)->{source});
+
+ # if we are not registered with a schema - just use the prototype
+ # however if we do have a schema - ask for the source by name (and
+ # throw in the process if all fails)
+ if (my $schema = try { $self->schema }) {
+ $schema->source($self->relationship_info($rel)->{source});
+ }
+ else {
+ my $class = $self->relationship_info($rel)->{class};
+ $self->ensure_class_loaded($class);
+ $class->result_source_instance;
+ }
}
=head2 related_class
=over 4
-=item Arguments: $relname
+=item Arguments: $rel_name
-=item Return value: $classname
+=item Return Value: $classname
=back
=over 4
-=item Arguments: None
+=item Arguments: none
-=item Return value: $source_handle
+=item Return Value: L<$source_handle|DBIx::Class::ResultSourceHandle>
=back
});
}
-{
- my $global_phase_destroy;
-
- END { $global_phase_destroy++ }
-
- sub DESTROY {
- return if $global_phase_destroy;
+my $global_phase_destroy;
+sub DESTROY {
+ return if $global_phase_destroy ||= in_global_destruction;
######
# !!! ACHTUNG !!!!
# we are trying to save to reattach back to the source we are destroying.
# The relevant code checking refcounts is in ::Schema::DESTROY()
- # if we are not a schema instance holder - we don't matter
- return if(
- ! ref $_[0]->{schema}
- or
- isweak $_[0]->{schema}
- );
+ # if we are not a schema instance holder - we don't matter
+ return if(
+ ! ref $_[0]->{schema}
+ or
+ isweak $_[0]->{schema}
+ );
- # weaken our schema hold forcing the schema to find somewhere else to live
+ # weaken our schema hold forcing the schema to find somewhere else to live
+ # during global destruction (if we have not yet bailed out) this will throw
+ # which will serve as a signal to not try doing anything else
+ # however beware - on older perls the exception seems randomly untrappable
+ # due to some weird race condition during thread joining :(((
+ local $@;
+ eval {
weaken $_[0]->{schema};
- # if schema is still there reintroduce ourselves with strong refs back
+ # if schema is still there reintroduce ourselves with strong refs back to us
if ($_[0]->{schema}) {
my $srcregs = $_[0]->{schema}->source_registrations;
for (keys %$srcregs) {
+ next unless $srcregs->{$_};
$srcregs->{$_} = $_[0] if $srcregs->{$_} == $_[0];
}
}
- }
+
+ 1;
+ } or do {
+ $global_phase_destroy = 1;
+ };
+
+ return;
}
-sub STORABLE_freeze { nfreeze($_[0]->handle) }
+sub STORABLE_freeze { Storable::nfreeze($_[0]->handle) }
sub STORABLE_thaw {
my ($self, $cloning, $ice) = @_;
- %$self = %{ (thaw $ice)->resolve };
+ %$self = %{ (Storable::thaw($ice))->resolve };
}
=head2 throw_exception
=item Arguments: 1/0 (default: 0)
-=item Return value: 1/0
+=item Return Value: 1/0
=back
should not be used. It will be removed before 1.0.
-=head1 AUTHORS
+=head1 AUTHOR AND CONTRIBUTORS
-Matt S. Trout <mst@shadowcatsystems.co.uk>
+See L<AUTHOR|DBIx::Class/AUTHOR> and L<CONTRIBUTORS|DBIx::Class/CONTRIBUTORS> in DBIx::Class
=head1 LICENSE
projects / dbsrgits/DBIx-Class.git / blobdiff