use strict;
use warnings;
+use base qw/DBIx::Class::ResultSource::RowParser DBIx::Class/;
+
use DBIx::Class::ResultSet;
use DBIx::Class::ResultSourceHandle;
use DBIx::Class::Exception;
use DBIx::Class::Carp;
+use DBIx::Class::GlobalDestruction;
use Try::Tiny;
use List::Util 'first';
use Scalar::Util qw/blessed weaken isweak/;
+
use namespace::clean;
-use base qw/DBIx::Class/;
+__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('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(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
$new->{_relationships} = { %{$new->{_relationships}||{}} };
$new->{name} ||= "!!NAME NOT SET!!";
$new->{_columns_info_loaded} ||= 0;
- $new->{sqlt_deploy_callback} ||= "default_sqlt_deploy_hook";
return $new;
}
=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
my $class = $self->result_class;
- if ($class and my $hook = $class->can('sqlt_deploy_hook')) {
- $self->$hook(@_);
+ if ($class and $class->can('sqlt_deploy_hook')) {
+ $class->sqlt_deploy_hook(@_);
}
}
);
}
+=head2 name
+
+=over 4
+
+=item Arguments: None
+
+=item Result value: $name
+
+=back
+
+Returns the name of the result source, which will typically be the table
+name. This may be a scalar reference if the result source has a non-standard
+name.
+
=head2 source_name
=over 4
retrieval from this source. In the case of a database, the required FROM
clause contents.
+=cut
+
+sub from { die 'Virtual method!' }
+
=head2 schema
=over 4
;
}
+# optionally takes either an arrayref of column names, or a hashref of already
+# retrieved colinfos
+# returns an arrayref of column names of the shortest unique constraint
+# (matching some of the input if any), giving preference to the PK
+sub _identifying_column_set {
+ my ($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 undef;
+}
+
# Returns the {from} structure used to express JOIN conditions
sub _resolve_join {
my ($self, $join, $alias, $seen, $jpath, $parent_force_left) = @_;
$jpath = [@$jpath]; # copy
- if (not defined $join) {
+ if (not defined $join or not length $join) {
return ();
}
elsif (ref $join eq 'ARRAY') {
,
-join_path => [@$jpath, { $join => $as } ],
-is_single => (
- $rel_info->{attrs}{accessor}
- &&
+ (! $rel_info->{attrs}{accessor})
+ or
first { $rel_info->{attrs}{accessor} eq $_ } (qw/single filter/)
),
-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)
];
}
}
# FIXME sanity check until things stabilize, remove at some point
$self->throw_exception (
- "A join-free condition returned for relationship '$relname' whithout a row-object to chain from"
+ "A join-free condition returned for relationship '$relname' without a row-object to chain from"
) unless $obj_rel;
# FIXME another sanity check
}
}
-# Accepts one or more relationships for the current source and returns an
-# array of column names for each of those relationships. Column names are
-# prefixed relative to the current source, in accordance with where they appear
-# in the supplied relationships.
-
-sub _resolve_prefetch {
- my ($self, $pre, $alias, $alias_map, $order, $collapse, $pref_path) = @_;
- $pref_path ||= [];
-
- if (not defined $pre) {
- return ();
- }
- elsif( ref $pre eq 'ARRAY' ) {
- return
- map { $self->_resolve_prefetch( $_, $alias, $alias_map, $order, $collapse, [ @$pref_path ] ) }
- @$pre;
- }
- elsif( ref $pre eq 'HASH' ) {
- my @ret =
- map {
- $self->_resolve_prefetch($_, $alias, $alias_map, $order, $collapse, [ @$pref_path ] ),
- $self->related_source($_)->_resolve_prefetch(
- $pre->{$_}, "${alias}.$_", $alias_map, $order, $collapse, [ @$pref_path, $_] )
- } keys %$pre;
- return @ret;
- }
- elsif( ref $pre ) {
- $self->throw_exception(
- "don't know how to resolve prefetch reftype ".ref($pre));
- }
- else {
- my $p = $alias_map;
- $p = $p->{$_} for (@$pref_path, $pre);
-
- $self->throw_exception (
- "Unable to resolve prefetch '$pre' - join alias map does not contain an entry for path: "
- . join (' -> ', @$pref_path, $pre)
- ) if (ref $p->{-join_aliases} ne 'ARRAY' or not @{$p->{-join_aliases}} );
-
- my $as = shift @{$p->{-join_aliases}};
-
- my $rel_info = $self->relationship_info( $pre );
- $self->throw_exception( $self->source_name . " has no such relationship '$pre'" )
- unless $rel_info;
- my $as_prefix = ($alias =~ /^.*?\.(.+)$/ ? $1.'.' : '');
- my $rel_source = $self->related_source($pre);
-
- 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';
- my $dots = @{[$as_prefix =~ m/\./g]} + 1; # +1 to match the ".${as_prefix}"
-
- if (my ($fail) = grep { @{[$_ =~ m/\./g]} == $dots }
- keys %{$collapse}) {
- my ($last) = ($fail =~ /([^\.]+)$/);
- carp (
- "Prefetching multiple has_many rels ${last} and ${pre} "
- .(length($as_prefix)
- ? "at the same level (${as_prefix}) "
- : "at top level "
- )
- . 'will explode the number of row objects retrievable via ->next or ->all. '
- . 'Use at your own risk.'
- );
- }
-
- #my @col = map { (/^self\.(.+)$/ ? ("${as_prefix}.$1") : ()); }
- # values %{$rel_info->{cond}};
- $collapse->{".${as_prefix}${pre}"} = [ $rel_source->_pri_cols ];
- # action at a distance. prepending the '.' allows simpler code
- # in ResultSet->_collapse_result
- my @key = map { (/^foreign\.(.+)$/ ? ($1) : ()); }
- keys %{$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
- # but the parent method is going away entirely anyway
- # so sod it
- my $sql_maker = $self->storage->sql_maker;
- my ($orig_ql, $orig_qr) = $sql_maker->_quote_chars;
- my $sep = $sql_maker->name_sep;
-
- # install our own quoter, so we can catch unqualified stuff
- local $sql_maker->{quote_char} = ["\x00", "\xFF"];
-
- my $quoted_prefix = "\x00${as}\xFF";
-
- for my $chunk ( $sql_maker->_order_by_chunks ($rel_order) ) {
- my @bind;
- ($chunk, @bind) = @$chunk if ref $chunk;
-
- $chunk = "${quoted_prefix}${sep}${chunk}"
- unless $chunk =~ /\Q$sep/;
-
- $chunk =~ s/\x00/$orig_ql/g;
- $chunk =~ s/\xFF/$orig_qr/g;
- push @$order, \[$chunk, @bind];
- }
- }
- }
-
- return map { [ "${as}.$_", "${as_prefix}${pre}.$_", ] }
- $rel_source->columns;
- }
-}
-
=head2 related_source
=over 4
});
}
-{
- my $global_phase_destroy;
-
- # SpeedyCGI runs END blocks every cycle but keeps object instances
- # hence we have to disable the globaldestroy hatch, and rely on the
- # eval trap below (which appears to work, but is risky done so late)
- END { $global_phase_destroy = 1 unless $CGI::SpeedyCGI::i_am_speedy }
-
- 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}
- );
-
- # 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
- local $@;
- eval {
- weaken $_[0]->{schema};
- 1;
- } or do {
- $global_phase_destroy = 1;
- return;
- };
+ # 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
+ # 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 $_[0]->{schema};
# if schema is still there reintroduce ourselves with strong refs back to us
if ($_[0]->{schema}) {
$srcregs->{$_} = $_[0] if $srcregs->{$_} == $_[0];
}
}
- }
+
+ 1;
+ } or do {
+ $global_phase_destroy = 1;
+ };
+
+ return;
}
sub STORABLE_freeze { Storable::nfreeze($_[0]->handle) }
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