# construct a much simpler array->hash folder for the one-table cases right here
if ($attrs->{_single_object_inflation} and ! $attrs->{collapse}) {
- # FIXME this is a very very very hot spot
+ # FIXME SUBOPTIMAL this is a very very very hot spot
# while rather optimal we can *still* do much better, by
# building a smarter [Row|HRI]::inflate_result(), and
- # switch to feeding it data via some leaner interface
+ # switch to feeding it data via a much leaner interface
#
my $infmap = $attrs->{as};
my @as_idx = 0..$#$infmap;
$r = [{ map { $infmap->[$_] => $r->[$_] } @as_idx }]
}
- # FIXME - this seems to be faster than the hashmapper aove, especially
+ # FIXME - this seems to be faster than the hashmapper above, especially
# on more rows, but need a better bench-environment to confirm
#eval sprintf (
# '$_ = [{ %s }] for @$rows',
else {
push @$rows, @{$self->{stashed_rows}||[]};
- $rsrc->_mk_row_parser({
+ my $perl = $rsrc->_mk_row_parser({
inflate_map => $attrs->{as},
selection => $attrs->{select},
collapse => $attrs->{collapse},
unordered => $unordered,
- })->(
+ });
+
+ (eval "sub { no warnings; no strict; $perl }")->( # disable of strictures seems to have some effect, weird
$rows, # modify in-place, shrinking/extending as necessary
($attrs->{collapse} and ! $fetch_all and ! $unordered)
? (
use strict;
use warnings;
-use base 'DBIx::Class';
+use base qw/DBIx::Class::ResultSource::RowParser DBIx::Class/;
use DBIx::Class::ResultSet;
use DBIx::Class::ResultSourceHandle;
use Try::Tiny;
use List::Util 'first';
use Scalar::Util qw/blessed weaken isweak/;
-use B 'perlstring';
use namespace::clean;
}
}
-# Accepts one or more relationships for the current source and returns an
-# array of column names for each of those relationships. Column names are
-# prefixed relative to the current source, in accordance with where they appear
-# in the supplied relationships.
-sub _resolve_prefetch {
- my ($self, $pre, $alias, $alias_map, $order, $pref_path) = @_;
- $pref_path ||= [];
-
- if (not defined $pre or not length $pre) {
- return ();
- }
- elsif( ref $pre eq 'ARRAY' ) {
- return
- map { $self->_resolve_prefetch( $_, $alias, $alias_map, $order, [ @$pref_path ] ) }
- @$pre;
- }
- elsif( ref $pre eq 'HASH' ) {
- my @ret =
- map {
- $self->_resolve_prefetch($_, $alias, $alias_map, $order, [ @$pref_path ] ),
- $self->related_source($_)->_resolve_prefetch(
- $pre->{$_}, "${alias}.$_", $alias_map, $order, [ @$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 ".${as_prefix}"
-
- #my @col = map { (/^self\.(.+)$/ ? ("${as_prefix}.$1") : ()); }
- # values %{$rel_info->{cond}};
- 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;
- }
-}
-
-# adding a dep on MoreUtils *just* for this is retarded
-my $unique_numlist = sub { [ sort { $a <=> $b } keys %{ {map { $_ => 1 } @_ }} ] };
-
-# This error must be thrown from two distinct codepaths, joining them is
-# rather hard. Go for this hack instead.
-my $get_related_source = sub {
- my ($rsrc, $rel, $relcols) = @_;
- try {
- $rsrc->related_source ($rel)
- } catch {
- $rsrc->throw_exception(sprintf(
- "Can't inflate prefetch into non-existent relationship '%s' from '%s', "
- . "check the inflation specification (columns/as) ending in '...%s.%s'.",
- $rel,
- $rsrc->source_name,
- $rel,
- (sort { length($a) <=> length ($b) } keys %$relcols)[0],
- ))};
-};
-
-# Takes a selection list and generates a collapse-map representing
-# row-object fold-points. Every relationship is assigned a set of unique,
-# non-nullable columns (which may *not even be* from the same resultset)
-# and the collapser will use this information to correctly distinguish
-# data of individual to-be-row-objects.
-sub _resolve_collapse {
- my ($self, $as, $as_fq_idx, $rel_chain, $parent_info, $node_idx_ref) = @_;
-
- # for comprehensible error messages put ourselves at the head of the relationship chain
- $rel_chain ||= [ $self->source_name ];
-
- # record top-level fully-qualified column index
- $as_fq_idx ||= { %$as };
-
- my ($my_cols, $rel_cols);
- for (keys %$as) {
- if ($_ =~ /^ ([^\.]+) \. (.+) /x) {
- $rel_cols->{$1}{$2} = 1;
- }
- else {
- $my_cols->{$_} = {}; # important for ||= below
- }
- }
-
- my $relinfo;
- # run through relationships, collect metadata, inject non-left fk-bridges from
- # *INNER-JOINED* children (if any)
- for my $rel (keys %$rel_cols) {
- my $rel_src = $get_related_source->($self, $rel, $rel_cols->{$rel});
-
- my $inf = $self->relationship_info ($rel);
-
- $relinfo->{$rel}{is_single} = $inf->{attrs}{accessor} && $inf->{attrs}{accessor} ne 'multi';
- $relinfo->{$rel}{is_inner} = ( $inf->{attrs}{join_type} || '' ) !~ /^left/i;
- $relinfo->{$rel}{rsrc} = $rel_src;
-
- my $cond = $inf->{cond};
-
- if (
- ref $cond eq 'HASH'
- and
- keys %$cond
- and
- ! first { $_ !~ /^foreign\./ } (keys %$cond)
- and
- ! first { $_ !~ /^self\./ } (values %$cond)
- ) {
- for my $f (keys %$cond) {
- my $s = $cond->{$f};
- $_ =~ s/^ (?: foreign | self ) \.//x for ($f, $s);
- $relinfo->{$rel}{fk_map}{$s} = $f;
-
- # need to know source from *our* pov, hnce $rel.
- $my_cols->{$s} ||= { via_fk => "$rel.$f" } if (
- defined $rel_cols->{$rel}{$f} # in fact selected
- and
- (! $node_idx_ref or $relinfo->{$rel}{is_inner}) # either top-level or an inner join
- );
- }
- }
- }
-
- # if the parent is already defined, assume all of its related FKs are selected
- # (even if they in fact are NOT in the select list). Keep a record of what we
- # assumed, and if any such phantom-column becomes part of our own collapser,
- # throw everything assumed-from-parent away and replace with the collapser of
- # the parent (whatever it may be)
- my $assumed_from_parent;
- unless ($parent_info->{underdefined}) {
- $assumed_from_parent->{columns} = { map
- # only add to the list if we do not already select said columns
- { ! exists $my_cols->{$_} ? ( $_ => 1 ) : () }
- values %{$parent_info->{rel_condition} || {}}
- };
-
- $my_cols->{$_} = { via_collapse => $parent_info->{collapse_on} }
- for keys %{$assumed_from_parent->{columns}};
- }
-
- # get colinfo for everything
- if ($my_cols) {
- my $ci = $self->columns_info;
- $my_cols->{$_}{colinfo} = $ci->{$_} for keys %$my_cols;
- }
-
- my $collapse_map;
-
- # try to resolve based on our columns (plus already inserted FK bridges)
- if (
- $my_cols
- and
- my $uset = $self->_unique_column_set ($my_cols)
- ) {
- # see if the resulting collapser relies on any implied columns,
- # and fix stuff up if this is the case
-
- my $parent_collapser_used = defined delete @{$uset}{keys %{$assumed_from_parent->{columns}}};
- $collapse_map->{-node_id} = $unique_numlist->(
- $parent_collapser_used ? @{$parent_info->{collapse_on}} : (),
- (map
- {
- my $fqc = join ('.',
- @{$rel_chain}[1 .. $#$rel_chain],
- ( $my_cols->{$_}{via_fk} || $_ ),
- );
-
- $as_fq_idx->{$fqc};
- }
- keys %$uset
- ),
- );
- }
-
- # Stil don't know how to collapse - keep descending down 1:1 chains - if
- # a related non-LEFT 1:1 is resolvable - its condition will collapse us
- # too
- unless ($collapse_map->{-node_id}) {
- my @candidates;
-
- for my $rel (keys %$relinfo) {
- next unless ($relinfo->{$rel}{is_single} && $relinfo->{$rel}{is_inner});
-
- if ( my $rel_collapse = $relinfo->{$rel}{rsrc}->_resolve_collapse (
- $rel_cols->{$rel},
- $as_fq_idx,
- [ @$rel_chain, $rel ],
- { underdefined => 1 }
- )) {
- push @candidates, $rel_collapse->{-node_id};
- }
- }
-
- # get the set with least amount of columns
- # FIXME - maybe need to implement a data type order as well (i.e. prefer several ints
- # to a single varchar)
- if (@candidates) {
- ($collapse_map->{-node_id}) = sort { scalar @$a <=> scalar @$b } (@candidates);
- }
- }
-
- # Still dont know how to collapse - see if the parent passed us anything
- # (i.e. reuse collapser over 1:1)
- unless ($collapse_map->{-node_id}) {
- $collapse_map->{-node_id} = $parent_info->{collapse_on}
- if $parent_info->{collapser_reusable};
- }
-
- # stop descending into children if we were called by a parent for first-pass
- # and don't despair if nothing was found (there may be other parallel branches
- # to dive into)
- if ($parent_info->{underdefined}) {
- return $collapse_map->{-node_id} ? $collapse_map : undef
- }
- # nothing down the chain resolved - can't calculate a collapse-map
- elsif (! $collapse_map->{-node_id}) {
- $self->throw_exception ( sprintf
- "Unable to calculate a definitive collapse column set for %s%s: fetch more unique non-nullable columns",
- $self->source_name,
- @$rel_chain > 1
- ? sprintf (' (last member of the %s chain)', join ' -> ', @$rel_chain )
- : ''
- ,
- );
- }
-
- # If we got that far - we are collapsable - GREAT! Now go down all children
- # a second time, and fill in the rest
-
- $collapse_map->{-is_optional} = 1 if $parent_info->{is_optional};
- $collapse_map->{-node_index} = ${ $node_idx_ref ||= \do { my $x = 1 } }++; # this is *deliberately* not 0-based
-
- my (@id_sets, $multis_in_chain);
- for my $rel (sort keys %$relinfo) {
-
- $collapse_map->{$rel} = $relinfo->{$rel}{rsrc}->_resolve_collapse (
- { map { $_ => 1 } ( keys %{$rel_cols->{$rel}} ) },
-
- $as_fq_idx,
-
- [ @$rel_chain, $rel],
-
- {
- collapse_on => [ @{$collapse_map->{-node_id}} ],
-
- rel_condition => $relinfo->{$rel}{fk_map},
-
- is_optional => $collapse_map->{-is_optional},
-
- # if this is a 1:1 our own collapser can be used as a collapse-map
- # (regardless of left or not)
- collapser_reusable => $relinfo->{$rel}{is_single},
- },
-
- $node_idx_ref,
- );
-
- $collapse_map->{$rel}{-is_single} = 1 if $relinfo->{$rel}{is_single};
- $collapse_map->{$rel}{-is_optional} ||= 1 unless $relinfo->{$rel}{is_inner};
- push @id_sets, @{ $collapse_map->{$rel}{-branch_id} };
- }
-
- $collapse_map->{-branch_id} = $unique_numlist->( @id_sets, @{$collapse_map->{-node_id}} );
-
- return $collapse_map;
-}
-
-sub _unique_column_set {
- my ($self, $cols) = @_;
-
- my %unique = $self->unique_constraints;
-
- # 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 (@$set) {
- next USET unless ($cols->{$_} && $cols->{$_}{colinfo} && !$cols->{$_}{colinfo}{is_nullable} );
- }
-
- return { map { $_ => 1 } @$set };
- }
-
- return undef;
-}
-
-# Takes an arrayref of {as} dbic column aliases and the collapse and select
-# attributes from the same $rs (the slector requirement is a temporary
-# workaround), and returns a coderef capable of:
-# my $me_pref_clps = $coderef->([$rs->cursor->next])
-# Where the $me_pref_clps arrayref is the future argument to
-# ::ResultSet::_collapse_result.
-#
-# $me_pref_clps->[0] is always returned (even if as an empty hash with no
-# rowdata), however branches of related data in $me_pref_clps->[1] may be
-# pruned short of what was originally requested based on {as}, depending
-# on:
-#
-# * If collapse is requested, a definitive collapse map is calculated for
-# every relationship "fold-point", consisting of a set of values (which
-# may not even be contained in the future 'me' of said relationship
-# (for example a cd.artist_id defines the related inner-joined artist)).
-# Thus a definedness check is carried on all collapse-condition values
-# and if at least one is undef it is assumed that we are dealing with a
-# NULLed right-side of a left-join, so we don't return a related data
-# container at all, which implies no related objects
-#
-# * If we are not collapsing, there is no constraint on having a selector
-# uniquely identifying all possible objects, and the user might have very
-# well requested a column that just *happens* to be all NULLs. What we do
-# in this case is fallback to the old behavior (which is a potential FIXME)
-# by always returning a data container, but only filling it with columns
-# IFF at least one of them is defined. This way we do not get an object
-# with a bunch of has_column_loaded to undef, but at the same time do not
-# further relationships based off this "null" object (e.g. in case the user
-# deliberately skipped link-table values). I am pretty sure there are some
-# tests that codify this behavior, need to find the exact testname.
-#
-# For an example of this coderef in action (and to see its guts) look at
-# t/prefetch/_internals.t
-#
-# This is a huge performance win, as we call the same code for
-# every row returned from the db, thus avoiding repeated method
-# lookups when traversing relationships
-#
-# Also since the coderef is completely stateless (the returned structure is
-# always fresh on every new invocation) this is a very good opportunity for
-# memoization if further speed improvements are needed
-#
-# The way we construct this coderef is somewhat fugly, although I am not
-# sure if the string eval is *that* bad of an idea. The alternative is to
-# have a *very* large number of anon coderefs calling each other in a twisty
-# maze, whereas the current result is a nice, smooth, single-pass function.
-# In any case - the output of this thing is meticulously micro-tested, so
-# any sort of rewrite should be relatively easy
-#
-sub _mk_row_parser {
- my ($self, $args) = @_;
-
- my $inflate_index = { map
- { $args->{inflate_map}[$_] => $_ }
- ( 0 .. $#{$args->{inflate_map}} )
- };
-
- my ($parser_src);
- if ($args->{collapse}) {
- # FIXME - deal with unorderedness
- # unordered => $unordered
-
- my $collapse_map = $self->_resolve_collapse (
- # FIXME
- # only consider real columns (not functions) during collapse resolution
- # this check shouldn't really be here, as fucktards are not supposed to
- # alias random crap to existing column names anyway, but still - just in
- # case
- # FIXME !!!! - this does not yet deal with unbalanced selectors correctly
- # (it is now trivial as the attrs specify where things go out of sync)
- { map
- { ref $args->{selection}[$inflate_index->{$_}] ? () : ( $_ => $inflate_index->{$_} ) }
- keys %$inflate_index
- }
- );
-
- my $unrolled_top_branch_id_indexes = join (', ', @{$collapse_map->{-branch_id}});
-
- my ($sequenced_top_branch_id, $sequenced_top_node_id) = map
- { join ('', map { "{'\xFF__IDVALPOS__${_}__\xFF'}" } @$_ ) }
- $collapse_map->{-branch_id}, $collapse_map->{-node_id}
- ;
-
- my $rolled_out_assemblers = __visit_infmap_collapse (
- $inflate_index, $collapse_map
- );
-
- my @sprintf_args = (
- $unrolled_top_branch_id_indexes,
- $sequenced_top_branch_id,
- $sequenced_top_node_id,
- $rolled_out_assemblers,
- $sequenced_top_node_id,
- );
- $parser_src = sprintf (<<'EOS', @sprintf_args);
-
-### BEGIN STRING EVAL
- my ($rows_pos, $result_pos, $cur_row, @cur_row_id_values, $is_new_res, @collapse_idx) = (0,0);
-
- # this loop is a bit arcane - the rationale is that the passed in
- # $_[0] will either have only one row (->next) or will have all
- # rows already pulled in (->all and/or unordered). Given that the
- # result can be rather large - we reuse the same already allocated
- # array, since the collapsed prefetch is smaller by definition.
- # At the end we cut the leftovers away and move on.
- while ($cur_row =
- ($rows_pos >= 0 and $_[0][$rows_pos++] or do { $rows_pos = -1; 0 } )
- ||
- ($_[1] and $_[1]->())
- ) {
-
- # FIXME
- # optimize this away when we know we have no undefs in the collapse map
- $cur_row_id_values[$_] = defined $cur_row->[$_] ? $cur_row->[$_] : "\xFF\xFFN\xFFU\xFFL\xFFL\xFF\xFF"
- for (%s); # the top branch_id includes all id values
-
- # check top branch for doubling via a has_many non-selecting join or something
- # 0 is reserved for this (node indexes start from 1)
- next if $collapse_idx[0]%s++;
-
- $is_new_res = ! $collapse_idx[1]%s;
-
- # lazify
- # fire on ordered only
-# if ($is_new_res = ! $collapse_idx[1]{$cur_row_id_values[2]}) {
-# }
-
- %s
-
- $_[0][$result_pos++] = $collapse_idx[1]%s
- if $is_new_res;
- }
-
- splice @{$_[0]}, $result_pos; # truncate the passed in array for cases of collapsing ->all()
-
-### END STRING EVAL
-EOS
-
- # change the quoted placeholders to unquoted alias-references
- $parser_src =~ s/ \' \xFF__VALPOS__(\d+)__\xFF \' /sprintf ('$cur_row->[%d]', $1)/gex;
- $parser_src =~ s/ \' \xFF__IDVALPOS__(\d+)__\xFF \' /sprintf ('$cur_row_id_values[%d]', $1)/gex;
- }
-
- else {
- $parser_src = sprintf(
- '$_ = %s for @{$_[0]}',
- __visit_infmap_simple($inflate_index, { rsrc => $self }), # need the $rsrc to determine left-ness
- );
-
- # change the quoted placeholders to unquoted alias-references
- $parser_src =~ s/ \' \xFF__VALPOS__(\d+)__\xFF \' /sprintf ('$_->[%d]', $1)/gex;
- }
-
- eval "sub { no strict; no warnings; $parser_src }" or die "$@\n\n$parser_src";
-}
-
-{
- # keep our own DD object around so we don't have to fitz with quoting
- my $dumper_obj;
- my $visit_dump = sub {
- # we actually will be producing functional perl code here,
- # thus no second-guessing of what these globals might have
- # been set to. DO NOT CHANGE!
- ($dumper_obj ||= do {
- require Data::Dumper;
- Data::Dumper->new([])
- ->Purity (1)
- ->Pad ('')
- ->Useqq (0)
- ->Terse (1)
- ->Quotekeys (1)
- ->Deepcopy (1)
- ->Deparse (0)
- ->Maxdepth (0)
- ->Indent (0)
- })->Values ([shift])->Dump,
- };
-
- sub __visit_infmap_simple {
- my ($val_idx, $args) = @_;
-
- my $my_cols = {};
- my $rel_cols;
- for (keys %$val_idx) {
- if ($_ =~ /^ ([^\.]+) \. (.+) /x) {
- $rel_cols->{$1}{$2} = $val_idx->{$_};
- }
- else {
- $my_cols->{$_} = $val_idx->{$_};
- }
- }
- my @relperl;
- for my $rel (sort keys %$rel_cols) {
-
- my $rel_rsrc = $get_related_source->($args->{rsrc}, $rel, $rel_cols->{$rel});
-
- #my $optional = $args->{is_optional};
- #$optional ||= ($args->{rsrc}->relationship_info($rel)->{attrs}{join_type} || '') =~ /^left/i;
-
- push @relperl, join ' => ', perlstring($rel), __visit_infmap_simple($rel_cols->{$rel}, {
- non_top => 1,
- #is_optional => $optional,
- rsrc => $rel_rsrc,
- });
-
- # FIXME SUBOPTIMAL - disabled to satisfy t/resultset/inflate_result_api.t
- #if ($optional and my @branch_null_checks = map
- # { "(! defined '\xFF__VALPOS__${_}__\xFF')" }
- # sort { $a <=> $b } values %{$rel_cols->{$rel}}
- #) {
- # $relperl[-1] = sprintf ( '(%s) ? ( %s => [] ) : ( %s )',
- # join (' && ', @branch_null_checks ),
- # perlstring($rel),
- # $relperl[-1],
- # );
- #}
- }
-
- my $me_struct = keys %$my_cols
- ? $visit_dump->({ map { $_ => "\xFF__VALPOS__$my_cols->{$_}__\xFF" } (keys %$my_cols) })
- : 'undef'
- ;
-
- return sprintf '[%s]', join (',',
- $me_struct,
- @relperl ? sprintf ('{ %s }', join (',', @relperl)) : (),
- );
- }
-
- sub __visit_infmap_collapse {
- my ($val_idx, $collapse_map, $parent_info) = @_;
-
- my $my_cols = {};
- my $rel_cols;
- for (keys %$val_idx) {
- if ($_ =~ /^ ([^\.]+) \. (.+) /x) {
- $rel_cols->{$1}{$2} = $val_idx->{$_};
- }
- else {
- $my_cols->{$_} = $val_idx->{$_};
- }
- }
-
- my $sequenced_node_id = join ('', map
- { "{'\xFF__IDVALPOS__${_}__\xFF'}" }
- @{$collapse_map->{-node_id}}
- );
-
- my $me_struct = keys %$my_cols
- ? $visit_dump->([{ map { $_ => "\xFF__VALPOS__$my_cols->{$_}__\xFF" } (keys %$my_cols) }])
- : 'undef'
- ;
- my $node_idx_ref = sprintf '$collapse_idx[%d]%s', $collapse_map->{-node_index}, $sequenced_node_id;
-
- my $parent_idx_ref = sprintf( '$collapse_idx[%d]%s[1]{%s}',
- @{$parent_info}{qw/node_idx sequenced_node_id/},
- perlstring($parent_info->{relname}),
- ) if $parent_info;
-
- my @src;
- if ($collapse_map->{-node_index} == 1) {
- push @src, sprintf( '%s ||= %s;',
- $node_idx_ref,
- $me_struct,
- );
- }
- elsif ($collapse_map->{-is_single}) {
- push @src, sprintf ( '%s = %s ||= %s;',
- $parent_idx_ref,
- $node_idx_ref,
- $me_struct,
- );
- }
- else {
- push @src, sprintf('push @{%s}, %s = %s if !%s;',
- $parent_idx_ref,
- $node_idx_ref,
- $me_struct,
- $node_idx_ref,
- );
- }
-
- #my $known_defined = { %{ $parent_info->{known_defined} || {} } };
- #$known_defined->{$_}++ for @{$collapse_map->{-node_id}};
-
- for my $rel (sort keys %$rel_cols) {
-
- push @src, sprintf( '%s[1]{%s} ||= [];', $node_idx_ref, perlstring($rel) );
-
- push @src, __visit_infmap_collapse($rel_cols->{$rel}, $collapse_map->{$rel}, {
- node_idx => $collapse_map->{-node_index},
- sequenced_node_id => $sequenced_node_id,
- relname => $rel,
- #known_defined => $known_defined,
- });
-
- # FIXME SUBOPTIMAL - disabled to satisfy t/resultset/inflate_result_api.t
- #if ($collapse_map->{$rel}{-is_optional} and my @null_checks = map
- # { "(! defined '\xFF__VALPOS__${_}__\xFF')" }
- # sort { $a <=> $b } grep
- # { ! $known_defined->{$_} }
- # @{$collapse_map->{$rel}{-node_id}}
- #) {
- # $src[-1] = sprintf( '(%s) or %s',
- # join (' || ', @null_checks ),
- # $src[-1],
- # );
- #}
- }
-
- join "\n", @src;
- }
-}
-
=head2 related_source
=over 4
--- /dev/null
+package DBIx::Class::ResultSource::RowParser;
+
+use strict;
+use warnings;
+
+use Try::Tiny;
+use List::Util 'first';
+use B 'perlstring';
+
+use namespace::clean;
+
+use base 'DBIx::Class';
+
+# Accepts one or more relationships for the current source and returns an
+# array of column names for each of those relationships. Column names are
+# prefixed relative to the current source, in accordance with where they appear
+# in the supplied relationships.
+sub _resolve_prefetch {
+ my ($self, $pre, $alias, $alias_map, $order, $pref_path) = @_;
+ $pref_path ||= [];
+
+ if (not defined $pre or not length $pre) {
+ return ();
+ }
+ elsif( ref $pre eq 'ARRAY' ) {
+ return
+ map { $self->_resolve_prefetch( $_, $alias, $alias_map, $order, [ @$pref_path ] ) }
+ @$pre;
+ }
+ elsif( ref $pre eq 'HASH' ) {
+ my @ret =
+ map {
+ $self->_resolve_prefetch($_, $alias, $alias_map, $order, [ @$pref_path ] ),
+ $self->related_source($_)->_resolve_prefetch(
+ $pre->{$_}, "${alias}.$_", $alias_map, $order, [ @$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 ".${as_prefix}"
+
+ #my @col = map { (/^self\.(.+)$/ ? ("${as_prefix}.$1") : ()); }
+ # values %{$rel_info->{cond}};
+ 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}${pre}.$_", ] }
+ $rel_source->columns;
+ }
+}
+
+# Takes a selection list and generates a collapse-map representing
+# row-object fold-points. Every relationship is assigned a set of unique,
+# non-nullable columns (which may *not even be* from the same resultset)
+# and the collapser will use this information to correctly distinguish
+# data of individual to-be-row-objects.
+sub _resolve_collapse {
+ my ($self, $as, $as_fq_idx, $rel_chain, $parent_info, $node_idx_ref) = @_;
+
+ # for comprehensible error messages put ourselves at the head of the relationship chain
+ $rel_chain ||= [ $self->source_name ];
+
+ # record top-level fully-qualified column index
+ $as_fq_idx ||= { %$as };
+
+ my ($my_cols, $rel_cols);
+ for (keys %$as) {
+ if ($_ =~ /^ ([^\.]+) \. (.+) /x) {
+ $rel_cols->{$1}{$2} = 1;
+ }
+ else {
+ $my_cols->{$_} = {}; # important for ||= below
+ }
+ }
+
+ my $relinfo;
+ # run through relationships, collect metadata, inject non-left fk-bridges from
+ # *INNER-JOINED* children (if any)
+ for my $rel (keys %$rel_cols) {
+ my $rel_src = __get_related_source($self, $rel, $rel_cols->{$rel});
+
+ my $inf = $self->relationship_info ($rel);
+
+ $relinfo->{$rel}{is_single} = $inf->{attrs}{accessor} && $inf->{attrs}{accessor} ne 'multi';
+ $relinfo->{$rel}{is_inner} = ( $inf->{attrs}{join_type} || '' ) !~ /^left/i;
+ $relinfo->{$rel}{rsrc} = $rel_src;
+
+ my $cond = $inf->{cond};
+
+ if (
+ ref $cond eq 'HASH'
+ and
+ keys %$cond
+ and
+ ! first { $_ !~ /^foreign\./ } (keys %$cond)
+ and
+ ! first { $_ !~ /^self\./ } (values %$cond)
+ ) {
+ for my $f (keys %$cond) {
+ my $s = $cond->{$f};
+ $_ =~ s/^ (?: foreign | self ) \.//x for ($f, $s);
+ $relinfo->{$rel}{fk_map}{$s} = $f;
+
+ # need to know source from *our* pov, hnce $rel.
+ $my_cols->{$s} ||= { via_fk => "$rel.$f" } if (
+ defined $rel_cols->{$rel}{$f} # in fact selected
+ and
+ (! $node_idx_ref or $relinfo->{$rel}{is_inner}) # either top-level or an inner join
+ );
+ }
+ }
+ }
+
+ # if the parent is already defined, assume all of its related FKs are selected
+ # (even if they in fact are NOT in the select list). Keep a record of what we
+ # assumed, and if any such phantom-column becomes part of our own collapser,
+ # throw everything assumed-from-parent away and replace with the collapser of
+ # the parent (whatever it may be)
+ my $assumed_from_parent;
+ unless ($parent_info->{underdefined}) {
+ $assumed_from_parent->{columns} = { map
+ # only add to the list if we do not already select said columns
+ { ! exists $my_cols->{$_} ? ( $_ => 1 ) : () }
+ values %{$parent_info->{rel_condition} || {}}
+ };
+
+ $my_cols->{$_} = { via_collapse => $parent_info->{collapse_on} }
+ for keys %{$assumed_from_parent->{columns}};
+ }
+
+ # get colinfo for everything
+ if ($my_cols) {
+ my $ci = $self->columns_info;
+ $my_cols->{$_}{colinfo} = $ci->{$_} for keys %$my_cols;
+ }
+
+ my $collapse_map;
+
+ # try to resolve based on our columns (plus already inserted FK bridges)
+ if (
+ $my_cols
+ and
+ my $uset = $self->_unique_column_set ($my_cols)
+ ) {
+ # see if the resulting collapser relies on any implied columns,
+ # and fix stuff up if this is the case
+
+ my $parent_collapser_used = defined delete @{$uset}{keys %{$assumed_from_parent->{columns}}};
+ $collapse_map->{-node_id} = __unique_numlist(
+ $parent_collapser_used ? @{$parent_info->{collapse_on}} : (),
+ (map
+ {
+ my $fqc = join ('.',
+ @{$rel_chain}[1 .. $#$rel_chain],
+ ( $my_cols->{$_}{via_fk} || $_ ),
+ );
+
+ $as_fq_idx->{$fqc};
+ }
+ keys %$uset
+ ),
+ );
+ }
+
+ # Stil don't know how to collapse - keep descending down 1:1 chains - if
+ # a related non-LEFT 1:1 is resolvable - its condition will collapse us
+ # too
+ unless ($collapse_map->{-node_id}) {
+ my @candidates;
+
+ for my $rel (keys %$relinfo) {
+ next unless ($relinfo->{$rel}{is_single} && $relinfo->{$rel}{is_inner});
+
+ if ( my $rel_collapse = $relinfo->{$rel}{rsrc}->_resolve_collapse (
+ $rel_cols->{$rel},
+ $as_fq_idx,
+ [ @$rel_chain, $rel ],
+ { underdefined => 1 }
+ )) {
+ push @candidates, $rel_collapse->{-node_id};
+ }
+ }
+
+ # get the set with least amount of columns
+ # FIXME - maybe need to implement a data type order as well (i.e. prefer several ints
+ # to a single varchar)
+ if (@candidates) {
+ ($collapse_map->{-node_id}) = sort { scalar @$a <=> scalar @$b } (@candidates);
+ }
+ }
+
+ # Still dont know how to collapse - see if the parent passed us anything
+ # (i.e. reuse collapser over 1:1)
+ unless ($collapse_map->{-node_id}) {
+ $collapse_map->{-node_id} = $parent_info->{collapse_on}
+ if $parent_info->{collapser_reusable};
+ }
+
+ # stop descending into children if we were called by a parent for first-pass
+ # and don't despair if nothing was found (there may be other parallel branches
+ # to dive into)
+ if ($parent_info->{underdefined}) {
+ return $collapse_map->{-node_id} ? $collapse_map : undef
+ }
+ # nothing down the chain resolved - can't calculate a collapse-map
+ elsif (! $collapse_map->{-node_id}) {
+ $self->throw_exception ( sprintf
+ "Unable to calculate a definitive collapse column set for %s%s: fetch more unique non-nullable columns",
+ $self->source_name,
+ @$rel_chain > 1
+ ? sprintf (' (last member of the %s chain)', join ' -> ', @$rel_chain )
+ : ''
+ ,
+ );
+ }
+
+ # If we got that far - we are collapsable - GREAT! Now go down all children
+ # a second time, and fill in the rest
+
+ $collapse_map->{-is_optional} = 1 if $parent_info->{is_optional};
+ $collapse_map->{-node_index} = ${ $node_idx_ref ||= \do { my $x = 1 } }++; # this is *deliberately* not 0-based
+
+ my (@id_sets, $multis_in_chain);
+ for my $rel (sort keys %$relinfo) {
+
+ $collapse_map->{$rel} = $relinfo->{$rel}{rsrc}->_resolve_collapse (
+ { map { $_ => 1 } ( keys %{$rel_cols->{$rel}} ) },
+
+ $as_fq_idx,
+
+ [ @$rel_chain, $rel],
+
+ {
+ collapse_on => [ @{$collapse_map->{-node_id}} ],
+
+ rel_condition => $relinfo->{$rel}{fk_map},
+
+ is_optional => $collapse_map->{-is_optional},
+
+ # if this is a 1:1 our own collapser can be used as a collapse-map
+ # (regardless of left or not)
+ collapser_reusable => $relinfo->{$rel}{is_single},
+ },
+
+ $node_idx_ref,
+ );
+
+ $collapse_map->{$rel}{-is_single} = 1 if $relinfo->{$rel}{is_single};
+ $collapse_map->{$rel}{-is_optional} ||= 1 unless $relinfo->{$rel}{is_inner};
+ push @id_sets, @{ $collapse_map->{$rel}{-branch_id} };
+ }
+
+ $collapse_map->{-branch_id} = __unique_numlist( @id_sets, @{$collapse_map->{-node_id}} );
+
+ return $collapse_map;
+}
+
+sub _unique_column_set {
+ my ($self, $cols) = @_;
+
+ my %unique = $self->unique_constraints;
+
+ # 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 (@$set) {
+ next USET unless ($cols->{$_} && $cols->{$_}{colinfo} && !$cols->{$_}{colinfo}{is_nullable} );
+ }
+
+ return { map { $_ => 1 } @$set };
+ }
+
+ return undef;
+}
+
+# Takes an arrayref of {as} dbic column aliases and the collapse and select
+# attributes from the same $rs (the slector requirement is a temporary
+# workaround), and returns a coderef capable of:
+# my $me_pref_clps = $coderef->([$rs->cursor->next])
+# Where the $me_pref_clps arrayref is the future argument to
+# ::ResultSet::_collapse_result.
+#
+# $me_pref_clps->[0] is always returned (even if as an empty hash with no
+# rowdata), however branches of related data in $me_pref_clps->[1] may be
+# pruned short of what was originally requested based on {as}, depending
+# on:
+#
+# * If collapse is requested, a definitive collapse map is calculated for
+# every relationship "fold-point", consisting of a set of values (which
+# may not even be contained in the future 'me' of said relationship
+# (for example a cd.artist_id defines the related inner-joined artist)).
+# Thus a definedness check is carried on all collapse-condition values
+# and if at least one is undef it is assumed that we are dealing with a
+# NULLed right-side of a left-join, so we don't return a related data
+# container at all, which implies no related objects
+#
+# * If we are not collapsing, there is no constraint on having a selector
+# uniquely identifying all possible objects, and the user might have very
+# well requested a column that just *happens* to be all NULLs. What we do
+# in this case is fallback to the old behavior (which is a potential FIXME)
+# by always returning a data container, but only filling it with columns
+# IFF at least one of them is defined. This way we do not get an object
+# with a bunch of has_column_loaded to undef, but at the same time do not
+# further relationships based off this "null" object (e.g. in case the user
+# deliberately skipped link-table values). I am pretty sure there are some
+# tests that codify this behavior, need to find the exact testname.
+#
+# For an example of this coderef in action (and to see its guts) look at
+# t/prefetch/_internals.t
+#
+# This is a huge performance win, as we call the same code for
+# every row returned from the db, thus avoiding repeated method
+# lookups when traversing relationships
+#
+# Also since the coderef is completely stateless (the returned structure is
+# always fresh on every new invocation) this is a very good opportunity for
+# memoization if further speed improvements are needed
+#
+# The way we construct this coderef is somewhat fugly, although I am not
+# sure if the string eval is *that* bad of an idea. The alternative is to
+# have a *very* large number of anon coderefs calling each other in a twisty
+# maze, whereas the current result is a nice, smooth, single-pass function.
+# In any case - the output of this thing is meticulously micro-tested, so
+# any sort of rewrite should be relatively easy
+#
+sub _mk_row_parser {
+ my ($self, $args) = @_;
+
+ my $inflate_index = { map
+ { $args->{inflate_map}[$_] => $_ }
+ ( 0 .. $#{$args->{inflate_map}} )
+ };
+
+ my ($parser_src);
+ if ($args->{collapse}) {
+ # FIXME - deal with unorderedness
+ # unordered => $unordered
+
+ my $collapse_map = $self->_resolve_collapse (
+ # FIXME
+ # only consider real columns (not functions) during collapse resolution
+ # this check shouldn't really be here, as fucktards are not supposed to
+ # alias random crap to existing column names anyway, but still - just in
+ # case
+ # FIXME !!!! - this does not yet deal with unbalanced selectors correctly
+ # (it is now trivial as the attrs specify where things go out of sync)
+ { map
+ { ref $args->{selection}[$inflate_index->{$_}] ? () : ( $_ => $inflate_index->{$_} ) }
+ keys %$inflate_index
+ }
+ );
+
+ my $unrolled_top_branch_id_indexes = join (', ', @{$collapse_map->{-branch_id}});
+
+ my ($sequenced_top_branch_id, $sequenced_top_node_id) = map
+ { join ('', map { "{'\xFF__IDVALPOS__${_}__\xFF'}" } @$_ ) }
+ $collapse_map->{-branch_id}, $collapse_map->{-node_id}
+ ;
+
+ my $rolled_out_assemblers = __visit_infmap_collapse (
+ $inflate_index, $collapse_map
+ );
+ my @sprintf_args = (
+ $unrolled_top_branch_id_indexes,
+ $sequenced_top_branch_id,
+ $sequenced_top_node_id,
+ $rolled_out_assemblers,
+ );
+
+ $parser_src = sprintf (<<'EOS', @sprintf_args);
+
+### BEGIN STRING EVAL
+ my ($rows_pos, $result_pos, $cur_row, @cur_row_id_values, $is_new_res, @collapse_idx) = (0,0);
+
+ # this loop is a bit arcane - the rationale is that the passed in
+ # $_[0] will either have only one row (->next) or will have all
+ # rows already pulled in (->all and/or unordered). Given that the
+ # result can be rather large - we reuse the same already allocated
+ # array, since the collapsed prefetch is smaller by definition.
+ # At the end we cut the leftovers away and move on.
+ while ($cur_row =
+ ( ( $rows_pos >= 0 and $_[0][$rows_pos++] ) or do { $rows_pos = -1; 0 } )
+ ||
+ ($_[1] and $_[1]->())
+ ) {
+
+ # FIXME
+ # optimize this away when we know we have no undefs in the collapse map
+ $cur_row_id_values[$_] = defined $cur_row->[$_] ? $cur_row->[$_] : "\xFF\xFFN\xFFU\xFFL\xFFL\xFF\xFF"
+ for (%1$s); # the top branch_id includes all id values
+
+ # check top branch for doubling via a has_many non-selecting join or something
+ # 0 is reserved for this (node indexes start from 1)
+ next if $collapse_idx[0]%2$s++;
+
+ $is_new_res = ! $collapse_idx[1]%3$s;
+
+ # lazify
+ # fire on ordered only
+# if ($is_new_res = ! $collapse_idx[1]{$cur_row_id_values[2]}) {
+# }
+
+ %4$s
+
+ $_[0][$result_pos++] = $collapse_idx[1]%3$s
+ if $is_new_res;
+ }
+
+ splice @{$_[0]}, $result_pos; # truncate the passed in array for cases of collapsing ->all()
+### END STRING EVAL
+EOS
+
+ # change the quoted placeholders to unquoted alias-references
+ $parser_src =~ s/ \' \xFF__VALPOS__(\d+)__\xFF \' /"\$cur_row->[$1]"/gex;
+ $parser_src =~ s/ \' \xFF__IDVALPOS__(\d+)__\xFF \' /"\$cur_row_id_values[$1]"/gex;
+ }
+
+ else {
+ $parser_src = sprintf('$_ = %s for @{$_[0]}', __visit_infmap_simple(
+ $inflate_index, { rsrc => $self }), # need the $rsrc to determine left-ness
+ );
+
+ # change the quoted placeholders to unquoted alias-references
+ # !!! note - different var than the one above
+ $parser_src =~ s/ \' \xFF__VALPOS__(\d+)__\xFF \' /"\$_->[$1]"/gex;
+ }
+
+ $parser_src;
+}
+
+sub __visit_infmap_simple {
+ my ($val_idx, $args) = @_;
+
+ my $my_cols = {};
+ my $rel_cols;
+ for (keys %$val_idx) {
+ if ($_ =~ /^ ([^\.]+) \. (.+) /x) {
+ $rel_cols->{$1}{$2} = $val_idx->{$_};
+ }
+ else {
+ $my_cols->{$_} = $val_idx->{$_};
+ }
+ }
+ my @relperl;
+ for my $rel (sort keys %$rel_cols) {
+
+ my $rel_rsrc = __get_related_source($args->{rsrc}, $rel, $rel_cols->{$rel});
+
+ #my $optional = $args->{is_optional};
+ #$optional ||= ($args->{rsrc}->relationship_info($rel)->{attrs}{join_type} || '') =~ /^left/i;
+
+ push @relperl, join ' => ', perlstring($rel), __visit_infmap_simple($rel_cols->{$rel}, {
+ non_top => 1,
+ #is_optional => $optional,
+ rsrc => $rel_rsrc,
+ });
+
+ # FIXME SUBOPTIMAL - disabled to satisfy t/resultset/inflate_result_api.t
+ #if ($optional and my @branch_null_checks = map
+ # { "(! defined '\xFF__VALPOS__${_}__\xFF')" }
+ # sort { $a <=> $b } values %{$rel_cols->{$rel}}
+ #) {
+ # $relperl[-1] = sprintf ( '(%s) ? ( %s => [] ) : ( %s )',
+ # join (' && ', @branch_null_checks ),
+ # perlstring($rel),
+ # $relperl[-1],
+ # );
+ #}
+ }
+
+ my $me_struct = keys %$my_cols
+ ? __visit_dump({ map { $_ => "\xFF__VALPOS__$my_cols->{$_}__\xFF" } (keys %$my_cols) })
+ : 'undef'
+ ;
+
+ return sprintf '[%s]', join (',',
+ $me_struct,
+ @relperl ? sprintf ('{ %s }', join (',', @relperl)) : (),
+ );
+}
+
+sub __visit_infmap_collapse {
+
+ my ($val_idx, $collapse_map, $parent_info) = @_;
+
+ my $my_cols = {};
+ my $rel_cols;
+ for (keys %$val_idx) {
+ if ($_ =~ /^ ([^\.]+) \. (.+) /x) {
+ $rel_cols->{$1}{$2} = $val_idx->{$_};
+ }
+ else {
+ $my_cols->{$_} = $val_idx->{$_};
+ }
+ }
+
+ my $sequenced_node_id = join ('', map
+ { "{'\xFF__IDVALPOS__${_}__\xFF'}" }
+ @{$collapse_map->{-node_id}}
+ );
+
+ my $me_struct = keys %$my_cols
+ ? __visit_dump([{ map { $_ => "\xFF__VALPOS__$my_cols->{$_}__\xFF" } (keys %$my_cols) }])
+ : 'undef'
+ ;
+ my $node_idx_ref = sprintf '$collapse_idx[%d]%s', $collapse_map->{-node_index}, $sequenced_node_id;
+
+ my $parent_idx_ref = sprintf( '$collapse_idx[%d]%s[1]{%s}',
+ @{$parent_info}{qw/node_idx sequenced_node_id/},
+ perlstring($parent_info->{relname}),
+ ) if $parent_info;
+
+ my @src;
+ if ($collapse_map->{-node_index} == 1) {
+ push @src, sprintf( '%s ||= %s;',
+ $node_idx_ref,
+ $me_struct,
+ );
+ }
+ elsif ($collapse_map->{-is_single}) {
+ push @src, sprintf ( '%s = %s ||= %s;',
+ $parent_idx_ref,
+ $node_idx_ref,
+ $me_struct,
+ );
+ }
+ else {
+ push @src, sprintf('push @{%s}, %s = %s if !%s;',
+ $parent_idx_ref,
+ $node_idx_ref,
+ $me_struct,
+ $node_idx_ref,
+ );
+ }
+
+ #my $known_defined = { %{ $parent_info->{known_defined} || {} } };
+ #$known_defined->{$_}++ for @{$collapse_map->{-node_id}};
+
+ for my $rel (sort keys %$rel_cols) {
+
+ push @src, sprintf( '%s[1]{%s} ||= [];', $node_idx_ref, perlstring($rel) );
+
+ push @src, __visit_infmap_collapse($rel_cols->{$rel}, $collapse_map->{$rel}, {
+ node_idx => $collapse_map->{-node_index},
+ sequenced_node_id => $sequenced_node_id,
+ relname => $rel,
+ #known_defined => $known_defined,
+ });
+
+ # FIXME SUBOPTIMAL - disabled to satisfy t/resultset/inflate_result_api.t
+ #if ($collapse_map->{$rel}{-is_optional} and my @null_checks = map
+ # { "(! defined '\xFF__VALPOS__${_}__\xFF')" }
+ # sort { $a <=> $b } grep
+ # { ! $known_defined->{$_} }
+ # @{$collapse_map->{$rel}{-node_id}}
+ #) {
+ # $src[-1] = sprintf( '(%s) or %s',
+ # join (' || ', @null_checks ),
+ # $src[-1],
+ # );
+ #}
+ }
+
+ join "\n", @src;
+}
+
+# adding a dep on MoreUtils *just* for this is retarded
+sub __unique_numlist {
+ [ sort { $a <=> $b } keys %{ {map { $_ => 1 } @_ }} ]
+}
+
+# This error must be thrown from two distinct codepaths, joining them is
+# rather hard. Go for this hack instead.
+sub __get_related_source {
+ my ($rsrc, $rel, $relcols) = @_;
+ try {
+ $rsrc->related_source ($rel)
+ } catch {
+ $rsrc->throw_exception(sprintf(
+ "Can't inflate prefetch into non-existent relationship '%s' from '%s', "
+ . "check the inflation specification (columns/as) ending in '...%s.%s'.",
+ $rel,
+ $rsrc->source_name,
+ $rel,
+ (sort { length($a) <=> length ($b) } keys %$relcols)[0],
+ ))};
+}
+
+# keep our own DD object around so we don't have to fitz with quoting
+my $dumper_obj;
+sub __visit_dump {
+ # we actually will be producing functional perl code here,
+ # thus no second-guessing of what these globals might have
+ # been set to. DO NOT CHANGE!
+ ($dumper_obj ||= do {
+ require Data::Dumper;
+ Data::Dumper->new([])
+ ->Useperl (1)
+ ->Purity (1)
+ ->Pad ('')
+ ->Useqq (0)
+ ->Terse (1)
+ ->Quotekeys (1)
+ ->Deepcopy (0)
+ ->Deparse (0)
+ ->Maxdepth (0)
+ ->Indent (0) # faster but harder to read, perhaps leave at 1 ?
+ })->Values ([$_[0]])->Dump;
+}
+
+1;
elsif (
$slot =~ /^Data::Dumper/
and
- $weak_registry->{$slot}{stacktrace} =~ /\QDBIx::Class::ResultSource::_mk_row_parser/
+ $weak_registry->{$slot}{stacktrace} =~ /\QDBIx::Class::ResultSource::RowParser::_mk_row_parser/
) {
# there should be only one D::D object (used to construct the rowparser)
# more would indicate trouble
projects / dbsrgits/DBIx-Class.git / commitdiff