Set this to a true value for a column whose value is somehow
automatically set. This is used to determine which columns to empty
-when cloning objects using C<copy>. It is also used by
+when cloning objects using L<DBIx::Class::Row/copy>. It is also used by
L<DBIx::Class::Schema/deploy>.
+=item is_numeric
+
+Set this to a true or false value (not C<undef>) to explicitly specify
+if this column contains numeric data. This controls how set_column
+decides whether to consider a column dirty after an update: if
+C<is_numeric> is true a numeric comparison C<< != >> will take place
+instead of the usual C<eq>
+
+If not specified the storage class will attempt to figure this out on
+first access to the column, based on the column C<data_type>. The
+result will be cached in this attribute.
+
=item is_foreign_key
Set this to a true value for a column that contains a key from a
reference to a scalar e.g. C<\'now()'> if you want a function). This
is currently only used by L<DBIx::Class::Schema/deploy>.
+See the note on L<DBIx::Class::Row/new> for more information about possible
+issues related to db-side default values.
+
=item sequence
Set this on a primary key column to the name of the sequence used to
sub name_unique_constraint {
my ($self, $cols) = @_;
- return join '_', $self->name, @$cols;
+ my $name = $self->name;
+ $name = $$name if ref $name;
+
+ return join '_', $name, @$cols;
}
=head2 unique_constraints
=back
Throws an exception if the condition is improperly supplied, or cannot
-be resolved using L</resolve_join>.
+be resolved.
=cut
}
return unless $f_source; # Can't test rel without f_source
- eval { $self->resolve_join($rel, 'me') };
+ eval { $self->_resolve_join($rel, 'me', {}, []) };
if ($@) { # If the resolve failed, back out and re-throw the error
delete $rels{$rel}; #
L<DBIx::Class::Relationship>.
The returned hashref is keyed by the name of the opposing
-relationship, and contains it's data in the same manner as
+relationship, and contains its data in the same manner as
L</relationship_info>.
=cut
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) ||
- !$self->compare_relationship_keys(\@other_refkeys, \@keys));
+ next if (!$self->_compare_relationship_keys(\@refkeys, \@other_keys) ||
+ !$self->_compare_relationship_keys(\@other_refkeys, \@keys));
$ret->{$otherrel} = $otherrel_info;
}
}
return $ret;
}
-=head2 compare_relationship_keys
-
-=over 4
-
-=item Arguments: \@keys1, \@keys2
-
-=item Return value: 1/0 (true/false)
-
-=back
-
-Returns true if both sets of keynames are the same, false otherwise.
-
-=cut
-
sub compare_relationship_keys {
+ carp 'compare_relationship_keys is a private method, stop calling it';
+ my $self = shift;
+ $self->_compare_relationship_keys (@_);
+}
+
+# Returns true if both sets of keynames are the same, false otherwise.
+sub _compare_relationship_keys {
my ($self, $keys1, $keys2) = @_;
# Make sure every keys1 is in keys2
return $found;
}
-=head2 resolve_join
-
-=over 4
+sub resolve_join {
+ carp 'resolve_join is a private method, stop calling it';
+ my $self = shift;
+ $self->_resolve_join (@_);
+}
-=item Arguments: $relation
+# Returns the {from} structure used to express JOIN conditions
+sub _resolve_join {
+ my ($self, $join, $alias, $seen, $jpath, $force_left) = @_;
-=item Return value: Join condition arrayref
+ # we need a supplied one, because we do in-place modifications, no returns
+ $self->throw_exception ('You must supply a seen hashref as the 3rd argument to _resolve_join')
+ unless ref $seen eq 'HASH';
-=back
+ $self->throw_exception ('You must supply a joinpath arrayref as the 4th argument to _resolve_join')
+ unless ref $jpath eq 'ARRAY';
-Returns the join structure required for the related result source.
+ $jpath = [@$jpath];
-=cut
-
-sub resolve_join {
- my ($self, $join, $alias, $seen, $force_left) = @_;
- $seen ||= {};
- $force_left ||= { force => 0 };
if (ref $join eq 'ARRAY') {
- return map { $self->resolve_join($_, $alias, $seen) } @$join;
+ return
+ map {
+ $self->_resolve_join($_, $alias, $seen, $jpath, $force_left);
+ } @$join;
} elsif (ref $join eq 'HASH') {
return
map {
- my $as = ($seen->{$_} ? $_.'_'.($seen->{$_}+1) : $_);
- local $force_left->{force};
+ my $as = ($seen->{$_} ? join ('_', $_, $seen->{$_} + 1) : $_); # the actual seen value will be incremented below
+ local $force_left->{force} = $force_left->{force};
(
- $self->resolve_join($_, $alias, $seen, $force_left),
- $self->related_source($_)->resolve_join(
- $join->{$_}, $as, $seen, $force_left
+ $self->_resolve_join($_, $alias, $seen, [@$jpath], $force_left),
+ $self->related_source($_)->_resolve_join(
+ $join->{$_}, $as, $seen, [@$jpath, $_], $force_left
)
);
} keys %$join;
} elsif (ref $join) {
$self->throw_exception("No idea how to resolve join reftype ".ref $join);
} else {
+
+ return() unless defined $join;
+
my $count = ++$seen->{$join};
- #use Data::Dumper; warn Dumper($seen);
my $as = ($count > 1 ? "${join}_${count}" : $join);
+
my $rel_info = $self->relationship_info($join);
$self->throw_exception("No such relationship ${join}") unless $rel_info;
my $type;
- if ($force_left->{force}) {
+ if ($force_left) {
$type = 'left';
} else {
$type = $rel_info->{attrs}{join_type} || '';
- $force_left->{force} = 1 if lc($type) eq 'left';
+ $force_left = 1 if lc($type) eq 'left';
}
- return [ { $as => $self->related_source($join)->from,
- -join_type => $type },
- $self->resolve_condition($rel_info->{cond}, $as, $alias) ];
+
+ my $rel_src = $self->related_source($join);
+ return [ { $as => $rel_src->from,
+ -source_handle => $rel_src->handle,
+ -join_type => $type,
+ -join_path => [@$jpath, $join],
+ -alias => $as,
+ -relation_chain_depth => $seen->{-relation_chain_depth} || 0,
+ },
+ $self->_resolve_condition($rel_info->{cond}, $as, $alias) ];
}
}
-=head2 pk_depends_on
-
-=over 4
-
-=item Arguments: $relname, $rel_data
-
-=item Return value: 1/0 (true/false)
-
-=back
-
-Determines whether a relation is dependent on an object from this source
-having already been inserted. Takes the name of the relationship and a
-hashref of columns of the related object.
-
-=cut
-
sub pk_depends_on {
+ carp 'pk_depends_on is a private method, stop calling it';
+ my $self = shift;
+ $self->_pk_depends_on (@_);
+}
+
+# Determines whether a relation is dependent on an object from this source
+# having already been inserted. Takes the name of the relationship and a
+# hashref of columns of the related object.
+sub _pk_depends_on {
my ($self, $relname, $rel_data) = @_;
my $cond = $self->relationship_info($relname)->{cond};
return 1;
}
-=head2 resolve_condition
-
-=over 4
-
-=item Arguments: $cond, $as, $alias|$object
-
-=back
-
-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.
-
-=cut
+sub resolve_condition {
+ carp 'resolve_condition is a private method, stop calling it';
+ my $self = shift;
+ $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 $UNRESOLVABLE_CONDITION = \'1 = 0';
-sub resolve_condition {
+sub _resolve_condition {
my ($self, $cond, $as, $for) = @_;
- #warn %$cond;
if (ref $cond eq 'HASH') {
my %ret;
foreach my $k (keys %{$cond}) {
#warn "$self $k $for $v";
unless ($for->has_column_loaded($v)) {
if ($for->in_storage) {
- $self->throw_exception("Column ${v} not loaded on ${for} trying to resolve relationship");
+ $self->throw_exception(
+ "Column ${v} not loaded or not passed to new() prior to insert()"
+ ." on ${for} trying to resolve relationship (maybe you forgot "
+ ."to call ->discard_changes to get defaults from the db)"
+ );
}
return $UNRESOLVABLE_CONDITION;
}
}
return \%ret;
} elsif (ref $cond eq 'ARRAY') {
- return [ map { $self->resolve_condition($_, $as, $for) } @$cond ];
+ return [ map { $self->_resolve_condition($_, $as, $for) } @$cond ];
} else {
- die("Can't handle this yet :(");
+ die("Can't handle condition $cond yet :(");
}
}
-=head2 resolve_prefetch
-
-=over 4
-
-=item Arguments: hashref/arrayref/scalar
-
-=back
-
-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. Examples:
-
- my $source = $schema->resultset('Tag')->source;
- @columns = $source->resolve_prefetch( { cd => 'artist' } );
-
- # @columns =
- #(
- # 'cd.cdid',
- # 'cd.artist',
- # 'cd.title',
- # 'cd.year',
- # 'cd.artist.artistid',
- # 'cd.artist.name'
- #)
-
- @columns = $source->resolve_prefetch( qw[/ cd /] );
-
- # @columns =
- #(
- # 'cd.cdid',
- # 'cd.artist',
- # 'cd.title',
- # 'cd.year'
- #)
-
- $source = $schema->resultset('CD')->source;
- @columns = $source->resolve_prefetch( qw[/ artist producer /] );
-
- # @columns =
- #(
- # 'artist.artistid',
- # 'artist.name',
- # 'producer.producerid',
- # 'producer.name'
- #)
-
-=cut
-
+# Legacy code, needs to go entirely away (fully replaced by _resolve_prefetch)
sub resolve_prefetch {
+ carp 'resolve_prefetch is a private method, stop calling it';
+
my ($self, $pre, $alias, $seen, $order, $collapse) = @_;
$seen ||= {};
- #$alias ||= $self->name;
- #warn $alias, Dumper $pre;
if( ref $pre eq 'ARRAY' ) {
return
map { $self->resolve_prefetch( $_, $alias, $seen, $order, $collapse ) }
$self->related_source($_)->resolve_prefetch(
$pre->{$_}, "${alias}.$_", $seen, $order, $collapse)
} keys %$pre;
- #die Dumper \@ret;
return @ret;
}
elsif( ref $pre ) {
? "at the same level (${as_prefix}) "
: "at top level "
)
- . 'will currently disrupt both the functionality of $rs->count(), '
- . 'and the amount of objects retrievable via $rs->next(). '
+ . 'will explode the number of row objects retrievable via ->next or ->all. '
+ . 'Use at your own risk.'
+ );
+ }
+ #my @col = map { (/^self\.(.+)$/ ? ("${as_prefix}.$1") : ()); }
+ # values %{$rel_info->{cond}};
+ $collapse->{".${as_prefix}${pre}"} = [ $rel_source->primary_columns ];
+ # action at a distance. prepending the '.' allows simpler code
+ # in ResultSet->_collapse_result
+ my @key = map { (/^foreign\.(.+)$/ ? ($1) : ()); }
+ keys %{$rel_info->{cond}};
+ my @ord = (ref($rel_info->{attrs}{order_by}) eq 'ARRAY'
+ ? @{$rel_info->{attrs}{order_by}}
+ : (defined $rel_info->{attrs}{order_by}
+ ? ($rel_info->{attrs}{order_by})
+ : ()));
+ push(@$order, map { "${as}.$_" } (@key, @ord));
+ }
+
+ return map { [ "${as}.$_", "${as_prefix}${pre}.$_", ] }
+ $rel_source->columns;
+ }
+}
+
+# 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. Needs an alias_map generated by
+# $rs->_joinpath_aliases
+
+sub _resolve_prefetch {
+ my ($self, $pre, $alias, $alias_map, $order, $collapse, $pref_path) = @_;
+ $pref_path ||= [];
+
+ if( 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( $self->name . " has no such relationship '$pre'" )
+ unless $rel_info;
+ my $as_prefix = ($alias =~ /^.*?\.(.+)$/ ? $1.'.' : '');
+ my $rel_source = $self->related_source($pre);
+
+ if (exists $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 (${as_prefix}) "
+ : "at top level "
+ )
+ . 'will explode the number of row objects retrievable via ->next or ->all. '
. 'Use at your own risk.'
);
}
return map { [ "${as}.$_", "${as_prefix}${pre}.$_", ] }
$rel_source->columns;
- #warn $alias, Dumper (\@ret);
- #return @ret;
}
}
projects / dbsrgits/DBIx-Class.git / blobdiff