use strict;
use warnings;
use overload
- '0+' => \&count,
- 'bool' => sub { 1; },
+ '0+' => "count",
+ 'bool' => "_bool",
fallback => 1;
use Carp::Clan qw/^DBIx::Class/;
use Data::Page;
use Storable;
use DBIx::Class::ResultSetColumn;
+use DBIx::Class::ResultSourceHandle;
use base qw/DBIx::Class/;
-__PACKAGE__->load_components(qw/AccessorGroup/);
-__PACKAGE__->mk_group_accessors('simple' => qw/result_source result_class/);
+__PACKAGE__->mk_group_accessors('simple' => qw/result_class _source_handle/);
=head1 NAME
__PACKAGE__->belongs_to(artist => 'MyApp::Schema::Artist');
1;
+=head1 OVERLOADING
+
+If a resultset is used as a number it returns the C<count()>. However, if it is used as a boolean it is always true. So if you want to check if a result set has any results use C<if $rs != 0>. C<if $rs> will always be true.
+
=head1 METHODS
=head2 new
return $class->new_result(@_) if ref $class;
my ($source, $attrs) = @_;
- #weaken $source;
+ $source = $source->handle
+ unless $source->isa('DBIx::Class::ResultSourceHandle');
+ $attrs = { %{$attrs||{}} };
if ($attrs->{page}) {
$attrs->{rows} ||= 10;
- $attrs->{offset} ||= 0;
- $attrs->{offset} += ($attrs->{rows} * ($attrs->{page} - 1));
}
$attrs->{alias} ||= 'me';
- bless {
- result_source => $source,
- result_class => $attrs->{result_class} || $source->result_class,
+ my $self = {
+ _source_handle => $source,
+ result_class => $attrs->{result_class} || $source->resolve->result_class,
cond => $attrs->{where},
count => undef,
pager => undef,
attrs => $attrs
- }, $class;
+ };
+
+ bless $self, $class;
+
+ return $self;
}
=head2 search
columns => [qw/name artistid/],
});
+For a list of attributes that can be passed to C<search>, see
+L</ATTRIBUTES>. For more examples of using this function, see
+L<Searching|DBIx::Class::Manual::Cookbook/Searching>. For a complete
+documentation for the first argument, see L<SQL::Abstract>.
+
=cut
sub search {
$attrs = pop(@_) if @_ > 1 and ref $_[$#_] eq 'HASH';
my $our_attrs = { %{$self->{attrs}} };
my $having = delete $our_attrs->{having};
+ my $where = delete $our_attrs->{where};
+
+ my $new_attrs = { %{$our_attrs}, %{$attrs} };
# merge new attrs into inherited
foreach my $key (qw/join prefetch/) {
next unless exists $attrs->{$key};
- $our_attrs->{$key} = $self->_merge_attr($our_attrs->{$key}, delete $attrs->{$key});
+ $new_attrs->{$key} = $self->_merge_attr($our_attrs->{$key}, $attrs->{$key});
}
-
- my $new_attrs = { %{$our_attrs}, %{$attrs} };
- my $where = (@_
+
+ my $cond = (@_
? (
(@_ == 1 || ref $_[0] eq "HASH")
- ? shift
+ ? (
+ (ref $_[0] eq 'HASH')
+ ? (
+ (keys %{ $_[0] } > 0)
+ ? shift
+ : undef
+ )
+ : shift
+ )
: (
(@_ % 2)
? $self->throw_exception("Odd number of arguments to search")
: $where);
}
+ if (defined $cond) {
+ $new_attrs->{where} = (
+ defined $new_attrs->{where}
+ ? { '-and' => [
+ map {
+ ref $_ eq 'ARRAY' ? [ -or => $_ ] : $_
+ } $cond, $new_attrs->{where}
+ ]
+ }
+ : $cond);
+ }
+
if (defined $having) {
$new_attrs->{having} = (
defined $new_attrs->{having}
If no C<key> is specified, it searches on all unique constraints defined on the
source, including the primary key.
+If your table does not have a primary key, you B<must> provide a value for the
+C<key> attribute matching one of the unique constraints on the source.
+
See also L</find_or_create> and L</update_or_create>. For information on how to
declare unique constraints, see
L<DBIx::Class::ResultSource/add_unique_constraint>.
? $self->result_source->unique_constraint_columns($attrs->{key})
: $self->result_source->primary_columns;
$self->throw_exception(
- "Can't find unless a primary key or unique constraint is defined"
+ "Can't find unless a primary key is defined or unique constraint is specified"
) unless @cols;
# Parse out a hashref from input
$input_query = {@_};
}
+ my (%related, $info);
+
+ KEY: foreach my $key (keys %$input_query) {
+ if (ref($input_query->{$key})
+ && ($info = $self->result_source->relationship_info($key))) {
+ my $val = delete $input_query->{$key};
+ next KEY if (ref($val) eq 'ARRAY'); # has_many for multi_create
+ my $rel_q = $self->result_source->resolve_condition(
+ $info->{cond}, $val, $key
+ );
+ die "Can't handle OR join condition in find" if ref($rel_q) eq 'ARRAY';
+ @related{keys %$rel_q} = values %$rel_q;
+ }
+ }
+ if (my @keys = keys %related) {
+ @{$input_query}{@keys} = values %related;
+ }
+
my @unique_queries = $self->_unique_queries($input_query, $attrs);
- # Handle cases where the ResultSet defines the query, or where the user is
- # abusing find
- my $query = @unique_queries ? \@unique_queries : $input_query;
+ # Build the final query: Default to the disjunction of the unique queries,
+ # but allow the input query in case the ResultSet defines the query or the
+ # user is abusing find
+ my $alias = exists $attrs->{alias} ? $attrs->{alias} : $self->{attrs}{alias};
+ my $query = @unique_queries
+ ? [ map { $self->_add_alias($_, $alias) } @unique_queries ]
+ : $self->_add_alias($input_query, $alias);
# Run the query
if (keys %$attrs) {
}
}
+# _add_alias
+#
+# Add the specified alias to the specified query hash. A copy is made so the
+# original query is not modified.
+
+sub _add_alias {
+ my ($self, $query, $alias) = @_;
+
+ my %aliased = %$query;
+ foreach my $col (grep { ! m/\./ } keys %aliased) {
+ $aliased{"$alias.$col"} = delete $aliased{$col};
+ }
+
+ return \%aliased;
+}
+
# _unique_queries
#
# Build a list of queries which satisfy unique constraints.
sub _unique_queries {
my ($self, $query, $attrs) = @_;
- my $alias = $self->{attrs}{alias};
my @constraint_names = exists $attrs->{key}
? ($attrs->{key})
: $self->result_source->unique_constraint_names;
+ my $where = $self->_collapse_cond($self->{attrs}{where} || {});
+ my $num_where = scalar keys %$where;
+
my @unique_queries;
foreach my $name (@constraint_names) {
my @unique_cols = $self->result_source->unique_constraint_columns($name);
my $unique_query = $self->_build_unique_query($query, \@unique_cols);
+ my $num_cols = scalar @unique_cols;
my $num_query = scalar keys %$unique_query;
- next unless $num_query;
- # Add the ResultSet's alias
- foreach my $col (grep { ! m/\./ } keys %$unique_query) {
- $unique_query->{"$alias.$col"} = delete $unique_query->{$col};
+ my $total = $num_query + $num_where;
+ if ($num_query && ($num_query == $num_cols || $total == $num_cols)) {
+ # The query is either unique on its own or is unique in combination with
+ # the existing where clause
+ push @unique_queries, $unique_query;
}
-
- # XXX: Assuming quite a bit about $self->{attrs}{where}
- my $num_cols = scalar @unique_cols;
- my $num_where = exists $self->{attrs}{where}
- ? scalar keys %{ $self->{attrs}{where} }
- : 0;
- push @unique_queries, $unique_query
- if $num_query + $num_where == $num_cols;
}
return @unique_queries;
}
}
- unless ($self->_is_unique_query($attrs->{where})) {
- carp "Query not guaranteed to return a single row"
- . "; please declare your unique constraints or use search instead";
- }
+# XXX: Disabled since it doesn't infer uniqueness in all cases
+# unless ($self->_is_unique_query($attrs->{where})) {
+# carp "Query not guaranteed to return a single row"
+# . "; please declare your unique constraints or use search instead";
+# }
my @data = $self->result_source->storage->select_single(
$attrs->{from}, $attrs->{select},
$attrs->{where}, $attrs
);
- return (@data ? $self->_construct_object(@data) : ());
+ return (@data ? ($self->_construct_object(@data))[0] : undef);
}
# _is_unique_query
my $max_length = $rs->get_column('length')->max;
-Returns a ResultSetColumn instance for $column based on $self
+Returns a L<DBIx::Class::ResultSetColumn> instance for a column of the ResultSet.
=cut
$self->{all_cache_position} = 1;
return ($self->all)[0];
}
+ if ($self->{stashed_objects}) {
+ my $obj = shift(@{$self->{stashed_objects}});
+ delete $self->{stashed_objects} unless @{$self->{stashed_objects}};
+ return $obj;
+ }
my @row = (
exists $self->{stashed_row}
? @{delete $self->{stashed_row}}
: $self->cursor->next
);
- return unless (@row);
- return $self->_construct_object(@row);
+ return undef unless (@row);
+ my ($row, @more) = $self->_construct_object(@row);
+ $self->{stashed_objects} = \@more if @more;
+ return $row;
}
sub _construct_object {
my ($self, @row) = @_;
my $info = $self->_collapse_result($self->{_attrs}{as}, \@row);
- my $new = $self->result_class->inflate_result($self->result_source, @$info);
- $new = $self->{_attrs}{record_filter}->($new)
+ my @new = $self->result_class->inflate_result($self->result_source, @$info);
+ @new = $self->{_attrs}{record_filter}->(@new)
if exists $self->{_attrs}{record_filter};
- return $new;
+ return @new;
}
sub _collapse_result {
- my ($self, $as, $row, $prefix) = @_;
+ my ($self, $as_proto, $row) = @_;
- my %const;
my @copy = @$row;
-
- foreach my $this_as (@$as) {
- my $val = shift @copy;
- if (defined $prefix) {
- if ($this_as =~ m/^\Q${prefix}.\E(.+)$/) {
- my $remain = $1;
- $remain =~ /^(?:(.*)\.)?([^.]+)$/;
- $const{$1||''}{$2} = $val;
- }
- } else {
- $this_as =~ /^(?:(.*)\.)?([^.]+)$/;
- $const{$1||''}{$2} = $val;
- }
- }
- my $alias = $self->{attrs}{alias};
- my $info = [ {}, {} ];
- foreach my $key (keys %const) {
- if (length $key && $key ne $alias) {
- my $target = $info;
- my @parts = split(/\./, $key);
- foreach my $p (@parts) {
- $target = $target->[1]->{$p} ||= [];
+ # 'foo' => [ undef, 'foo' ]
+ # 'foo.bar' => [ 'foo', 'bar' ]
+ # 'foo.bar.baz' => [ 'foo.bar', 'baz' ]
+
+ my @construct_as = map { [ (/^(?:(.*)\.)?([^.]+)$/) ] } @$as_proto;
+
+ my %collapse = %{$self->{_attrs}{collapse}||{}};
+
+ my @pri_index;
+
+ # if we're doing collapsing (has_many prefetch) we need to grab records
+ # until the PK changes, so fill @pri_index. if not, we leave it empty so
+ # we know we don't have to bother.
+
+ # the reason for not using the collapse stuff directly is because if you
+ # had for e.g. two artists in a row with no cds, the collapse info for
+ # both would be NULL (undef) so you'd lose the second artist
+
+ # store just the index so we can check the array positions from the row
+ # without having to contruct the full hash
+
+ if (keys %collapse) {
+ my %pri = map { ($_ => 1) } $self->result_source->primary_columns;
+ foreach my $i (0 .. $#construct_as) {
+ next if defined($construct_as[$i][0]); # only self table
+ if (delete $pri{$construct_as[$i][1]}) {
+ push(@pri_index, $i);
}
- $target->[0] = $const{$key};
- } else {
- $info->[0] = $const{$key};
+ last unless keys %pri; # short circuit (Johnny Five Is Alive!)
}
}
-
- my @collapse;
- if (defined $prefix) {
- @collapse = map {
- m/^\Q${prefix}.\E(.+)$/ ? ($1) : ()
- } keys %{$self->{_attrs}{collapse}}
- } else {
- @collapse = keys %{$self->{_attrs}{collapse}};
- };
- if (@collapse) {
- my ($c) = sort { length $a <=> length $b } @collapse;
- my $target = $info;
- foreach my $p (split(/\./, $c)) {
- $target = $target->[1]->{$p} ||= [];
+ # no need to do an if, it'll be empty if @pri_index is empty anyway
+
+ my %pri_vals = map { ($_ => $copy[$_]) } @pri_index;
+
+ my @const_rows;
+
+ do { # no need to check anything at the front, we always want the first row
+
+ my %const;
+
+ foreach my $this_as (@construct_as) {
+ $const{$this_as->[0]||''}{$this_as->[1]} = shift(@copy);
}
- my $c_prefix = (defined($prefix) ? "${prefix}.${c}" : $c);
- my @co_key = @{$self->{_attrs}{collapse}{$c_prefix}};
- my $tree = $self->_collapse_result($as, $row, $c_prefix);
- my %co_check = map { ($_, $tree->[0]->{$_}); } @co_key;
- my (@final, @raw);
-
- while (
- !(
+
+ push(@const_rows, \%const);
+
+ } until ( # no pri_index => no collapse => drop straight out
+ !@pri_index
+ or
+ do { # get another row, stash it, drop out if different PK
+
+ @copy = $self->cursor->next;
+ $self->{stashed_row} = \@copy;
+
+ # last thing in do block, counts as true if anything doesn't match
+
+ # check xor defined first for NULL vs. NOT NULL then if one is
+ # defined the other must be so check string equality
+
grep {
- !defined($tree->[0]->{$_}) || $co_check{$_} ne $tree->[0]->{$_}
- } @co_key
- )
- ) {
- push(@final, $tree);
- last unless (@raw = $self->cursor->next);
- $row = $self->{stashed_row} = \@raw;
- $tree = $self->_collapse_result($as, $row, $c_prefix);
+ (defined $pri_vals{$_} ^ defined $copy[$_])
+ || (defined $pri_vals{$_} && ($pri_vals{$_} ne $copy[$_]))
+ } @pri_index;
+ }
+ );
+
+ my $alias = $self->{attrs}{alias};
+ my $info = [];
+
+ my %collapse_pos;
+
+ my @const_keys;
+
+ foreach my $const (@const_rows) {
+ scalar @const_keys or do {
+ @const_keys = sort { length($a) <=> length($b) } keys %$const;
+ };
+ foreach my $key (@const_keys) {
+ if (length $key) {
+ my $target = $info;
+ my @parts = split(/\./, $key);
+ my $cur = '';
+ my $data = $const->{$key};
+ foreach my $p (@parts) {
+ $target = $target->[1]->{$p} ||= [];
+ $cur .= ".${p}";
+ if ($cur eq ".${key}" && (my @ckey = @{$collapse{$cur}||[]})) {
+ # collapsing at this point and on final part
+ my $pos = $collapse_pos{$cur};
+ CK: foreach my $ck (@ckey) {
+ if (!defined $pos->{$ck} || $pos->{$ck} ne $data->{$ck}) {
+ $collapse_pos{$cur} = $data;
+ delete @collapse_pos{ # clear all positioning for sub-entries
+ grep { m/^\Q${cur}.\E/ } keys %collapse_pos
+ };
+ push(@$target, []);
+ last CK;
+ }
+ }
+ }
+ if (exists $collapse{$cur}) {
+ $target = $target->[-1];
+ }
+ }
+ $target->[0] = $data;
+ } else {
+ $info->[0] = $const->{$key};
+ }
}
- @$target = (@final ? @final : [ {}, {} ]);
- # single empty result to indicate an empty prefetched has_many
}
- #print "final info: " . Dumper($info);
return $info;
}
An accessor for the primary ResultSource object from which this ResultSet
is derived.
+=head2 result_class
+
+=over 4
+
+=item Arguments: $result_class?
+
+=item Return Value: $result_class
+
+=back
+
+An accessor for the class to use when creating row objects. Defaults to
+C<< result_source->result_class >> - which in most cases is the name of the
+L<"table"|DBIx::Class::Manual::Glossary/"ResultSource"> class.
+
=cut
my $count = $self->_count;
return 0 unless $count;
- $count -= $self->{attrs}{offset} if $self->{attrs}{offset};
+ # need to take offset from resolved attrs
+
+ $count -= $self->{_attrs}{offset} if $self->{_attrs}{offset};
$count = $self->{attrs}{rows} if
$self->{attrs}{rows} and $self->{attrs}{rows} < $count;
+ $count = 0 if ($count < 0);
return $count;
}
return $count;
}
+sub _bool {
+ return 1;
+}
+
=head2 count_literal
=over 4
# appropriately, returning the new condition.
sub _cond_for_update_delete {
- my ($self) = @_;
+ my ($self, $full_cond) = @_;
my $cond = {};
+ $full_cond ||= $self->{cond};
# No-op. No condition, we're updating/deleting everything
- return $cond unless ref $self->{cond};
+ return $cond unless ref $full_cond;
- if (ref $self->{cond} eq 'ARRAY') {
+ if (ref $full_cond eq 'ARRAY') {
$cond = [
map {
my %hash;
$hash{$1} = $_->{$key};
}
\%hash;
- } @{$self->{cond}}
+ } @{$full_cond}
];
}
- elsif (ref $self->{cond} eq 'HASH') {
- if ((keys %{$self->{cond}})[0] eq '-and') {
+ elsif (ref $full_cond eq 'HASH') {
+ if ((keys %{$full_cond})[0] eq '-and') {
$cond->{-and} = [];
- my @cond = @{$self->{cond}{-and}};
+ my @cond = @{$full_cond->{-and}};
for (my $i = 0; $i < @cond; $i++) {
my $entry = $cond[$i];
- my %hash;
+ my $hash;
if (ref $entry eq 'HASH') {
- foreach my $key (keys %{$entry}) {
- $key =~ /([^.]+)$/;
- $hash{$1} = $entry->{$key};
- }
+ $hash = $self->_cond_for_update_delete($entry);
}
else {
$entry =~ /([^.]+)$/;
- $hash{$1} = $cond[++$i];
+ $hash->{$1} = $cond[++$i];
}
- push @{$cond->{-and}}, \%hash;
+ push @{$cond->{-and}}, $hash;
}
}
else {
- foreach my $key (keys %{$self->{cond}}) {
+ foreach my $key (keys %{$full_cond}) {
$key =~ /([^.]+)$/;
- $cond->{$1} = $self->{cond}{$key};
+ $cond->{$1} = $full_cond->{$key};
}
}
}
unless ref $values eq 'HASH';
my $cond = $self->_cond_for_update_delete;
-
+
return $self->result_source->storage->update(
- $self->result_source->from, $values, $cond
+ $self->result_source, $values, $cond
);
}
Deletes the contents of the resultset from its result source. Note that this
will not run DBIC cascade triggers. See L</delete_all> if you need triggers
-to run.
+to run. See also L<DBIx::Class::Row/delete>.
=cut
my $cond = $self->_cond_for_update_delete;
- $self->result_source->storage->delete($self->result_source->from, $cond);
+ $self->result_source->storage->delete($self->result_source, $cond);
return 1;
}
return 1;
}
+=head2 populate
+
+=over 4
+
+=item Arguments: \@data;
+
+=back
+
+Pass an arrayref of hashrefs. Each hashref should be a structure suitable for
+submitting to a $resultset->create(...) method.
+
+In void context, C<insert_bulk> in L<DBIx::Class::Storage::DBI> is used
+to insert the data, as this is a faster method.
+
+Otherwise, each set of data is inserted into the database using
+L<DBIx::Class::ResultSet/create>, and a arrayref of the resulting row
+objects is returned.
+
+Example: Assuming an Artist Class that has many CDs Classes relating:
+
+ my $Artist_rs = $schema->resultset("Artist");
+
+ ## Void Context Example
+ $Artist_rs->populate([
+ { artistid => 4, name => 'Manufactured Crap', cds => [
+ { title => 'My First CD', year => 2006 },
+ { title => 'Yet More Tweeny-Pop crap', year => 2007 },
+ ],
+ },
+ { artistid => 5, name => 'Angsty-Whiny Girl', cds => [
+ { title => 'My parents sold me to a record company' ,year => 2005 },
+ { title => 'Why Am I So Ugly?', year => 2006 },
+ { title => 'I Got Surgery and am now Popular', year => 2007 }
+ ],
+ },
+ ]);
+
+ ## Array Context Example
+ my ($ArtistOne, $ArtistTwo, $ArtistThree) = $Artist_rs->populate([
+ { name => "Artist One"},
+ { name => "Artist Two"},
+ { name => "Artist Three", cds=> [
+ { title => "First CD", year => 2007},
+ { title => "Second CD", year => 2008},
+ ]}
+ ]);
+
+ print $ArtistOne->name; ## response is 'Artist One'
+ print $ArtistThree->cds->count ## reponse is '2'
+
+Please note an important effect on your data when choosing between void and
+wantarray context. Since void context goes straight to C<insert_bulk> in
+L<DBIx::Class::Storage::DBI> this will skip any component that is overriding
+c<insert>. So if you are using something like L<DBIx-Class-UUIDColumns> to
+create primary keys for you, you will find that your PKs are empty. In this
+case you will have to use the wantarray context in order to create those
+values.
+
+=cut
+
+sub populate {
+ my ($self, $data) = @_;
+
+ if(defined wantarray) {
+ my @created;
+ foreach my $item (@$data) {
+ push(@created, $self->create($item));
+ }
+ return @created;
+ } else {
+ my ($first, @rest) = @$data;
+
+ my @names = grep {!ref $first->{$_}} keys %$first;
+ my @rels = grep { $self->result_source->has_relationship($_) } keys %$first;
+ my @pks = $self->result_source->primary_columns;
+
+ ## do the belongs_to relationships
+ foreach my $index (0..$#$data) {
+ if( grep { !defined $data->[$index]->{$_} } @pks ) {
+ my @ret = $self->populate($data);
+ return;
+ }
+
+ foreach my $rel (@rels) {
+ next unless $data->[$index]->{$rel} && ref $data->[$index]->{$rel} eq "HASH";
+ my $result = $self->related_resultset($rel)->create($data->[$index]->{$rel});
+ my ($reverse) = keys %{$self->result_source->reverse_relationship_info($rel)};
+ my $related = $result->result_source->resolve_condition(
+ $result->result_source->relationship_info($reverse)->{cond},
+ $self,
+ $result,
+ );
+
+ delete $data->[$index]->{$rel};
+ $data->[$index] = {%{$data->[$index]}, %$related};
+
+ push @names, keys %$related if $index == 0;
+ }
+ }
+
+ ## do bulk insert on current row
+ my @values = map { [ @$_{@names} ] } @$data;
+
+ $self->result_source->storage->insert_bulk(
+ $self->result_source,
+ \@names,
+ \@values,
+ );
+
+ ## do the has_many relationships
+ foreach my $item (@$data) {
+
+ foreach my $rel (@rels) {
+ next unless $item->{$rel} && ref $item->{$rel} eq "ARRAY";
+
+ my $parent = $self->find(map {{$_=>$item->{$_}} } @pks)
+ || $self->throw_exception('Cannot find the relating object.');
+
+ my $child = $parent->$rel;
+
+ my $related = $child->result_source->resolve_condition(
+ $parent->result_source->relationship_info($rel)->{cond},
+ $child,
+ $parent,
+ );
+
+ my @rows_to_add = ref $item->{$rel} eq 'ARRAY' ? @{$item->{$rel}} : ($item->{$rel});
+ my @populate = map { {%$_, %$related} } @rows_to_add;
+
+ $child->populate( \@populate );
+ }
+ }
+ }
+}
+
=head2 pager
=over 4
=back
-Creates an object in the resultset's result class and returns it.
+Creates a new row object in the resultset's result class and returns
+it. The row is not inserted into the database at this point, call
+L<DBIx::Class::Row/insert> to do that. Calling L<DBIx::Class::Row/in_storage>
+will tell you whether the row object has been inserted or not.
+
+Passes the hashref of input on to L<DBIx::Class::Row/new>.
=cut
$self->throw_exception(
"Can't abstract implicit construct, condition not a hash"
) if ($self->{cond} && !(ref $self->{cond} eq 'HASH'));
- my %new = %$values;
+
my $alias = $self->{attrs}{alias};
- foreach my $key (keys %{$self->{cond}||{}}) {
- $new{$1} = $self->{cond}{$key} if ($key =~ m/^(?:\Q${alias}.\E)?([^.]+)$/);
+ my $collapsed_cond = $self->{cond} ? $self->_collapse_cond($self->{cond}) : {};
+ my %new = (
+ %{ $self->_remove_alias($values, $alias) },
+ %{ $self->_remove_alias($collapsed_cond, $alias) },
+ -source_handle => $self->_source_handle,
+ -result_source => $self->result_source, # DO NOT REMOVE THIS, REQUIRED
+ );
+
+ return $self->result_class->new(\%new);
+}
+
+# _collapse_cond
+#
+# Recursively collapse the condition.
+
+sub _collapse_cond {
+ my ($self, $cond, $collapsed) = @_;
+
+ $collapsed ||= {};
+
+ if (ref $cond eq 'ARRAY') {
+ foreach my $subcond (@$cond) {
+ next unless ref $subcond; # -or
+# warn "ARRAY: " . Dumper $subcond;
+ $collapsed = $self->_collapse_cond($subcond, $collapsed);
+ }
}
- my $obj = $self->result_class->new(\%new);
- $obj->result_source($self->result_source) if $obj->can('result_source');
- return $obj;
+ elsif (ref $cond eq 'HASH') {
+ if (keys %$cond and (keys %$cond)[0] eq '-and') {
+ foreach my $subcond (@{$cond->{-and}}) {
+# warn "HASH: " . Dumper $subcond;
+ $collapsed = $self->_collapse_cond($subcond, $collapsed);
+ }
+ }
+ else {
+# warn "LEAF: " . Dumper $cond;
+ foreach my $col (keys %$cond) {
+ my $value = $cond->{$col};
+ $collapsed->{$col} = $value;
+ }
+ }
+ }
+
+ return $collapsed;
+}
+
+# _remove_alias
+#
+# Remove the specified alias from the specified query hash. A copy is made so
+# the original query is not modified.
+
+sub _remove_alias {
+ my ($self, $query, $alias) = @_;
+
+ my %orig = %{ $query || {} };
+ my %unaliased;
+
+ foreach my $key (keys %orig) {
+ if ($key !~ /\./) {
+ $unaliased{$key} = $orig{$key};
+ next;
+ }
+ $unaliased{$1} = $orig{$key}
+ if $key =~ m/^(?:\Q$alias\E\.)?([^.]+)$/;
+ }
+
+ return \%unaliased;
}
=head2 find_or_new
=back
-Inserts a record into the resultset and returns the object representing it.
+Attempt to create a single new row or a row with multiple related rows
+in the table represented by the resultset (and related tables). This
+will not check for duplicate rows before inserting, use
+L</find_or_create> to do that.
+
+To create one row for this resultset, pass a hashref of key/value
+pairs representing the columns of the table and the values you wish to
+store. If the appropriate relationships are set up, foreign key fields
+can also be passed an object representing the foreign row, and the
+value will be set to it's primary key.
+
+To create related objects, pass a hashref for the value if the related
+item is a foreign key relationship (L<DBIx::Class::Relationship/belongs_to>),
+and use the name of the relationship as the key. (NOT the name of the field,
+necessarily). For C<has_many> and C<has_one> relationships, pass an arrayref
+of hashrefs containing the data for each of the rows to create in the foreign
+tables, again using the relationship name as the key.
+
+Instead of hashrefs of plain related data (key/value pairs), you may
+also pass new or inserted objects. New objects (not inserted yet, see
+L</new>), will be inserted into their appropriate tables.
Effectively a shortcut for C<< ->new_result(\%vals)->insert >>.
+Example of creating a new row.
+
+ $person_rs->create({
+ name=>"Some Person",
+ email=>"somebody@someplace.com"
+ });
+
+Example of creating a new row and also creating rows in a related C<has_many>
+or C<has_one> resultset. Note Arrayref.
+
+ $artist_rs->create(
+ { artistid => 4, name => 'Manufactured Crap', cds => [
+ { title => 'My First CD', year => 2006 },
+ { title => 'Yet More Tweeny-Pop crap', year => 2007 },
+ ],
+ },
+ );
+
+Example of creating a new row and also creating a row in a related
+C<belongs_to>resultset. Note Hashref.
+
+ $cd_rs->create({
+ title=>"Music for Silly Walks",
+ year=>2000,
+ artist => {
+ name=>"Silly Musician",
+ }
+ });
+
=cut
sub create {
my $attrs = (@_ > 1 && ref $_[$#_] eq 'HASH' ? pop(@_) : {});
my $cond = ref $_[0] eq 'HASH' ? shift : {@_};
- my $row = $self->find($cond);
+ my $row = $self->find($cond, $attrs);
if (defined $row) {
$row->update($cond);
return $row;
my $rel_obj = $self->result_source->relationship_info($rel);
$self->throw_exception(
- "search_related: result source '" . $self->result_source->name .
+ "search_related: result source '" . $self->result_source->source_name .
"' has no such relationship $rel")
unless $rel_obj;
my $join_count = $seen->{$rel};
my $alias = ($join_count > 1 ? join('_', $rel, $join_count) : $rel);
- $self->result_source->schema->resultset($rel_obj->{class})->search_rs(
- undef, {
- %{$self->{attrs}||{}},
- join => undef,
- prefetch => undef,
- select => undef,
- as => undef,
- alias => $alias,
- where => $self->{cond},
- seen_join => $seen,
- _parent_from => $from,
- });
+ #XXX - temp fix for result_class bug. There likely is a more elegant fix -groditi
+ my %attrs = %{$self->{attrs}||{}};
+ delete @attrs{qw(result_class alias)};
+
+ my $new_cache;
+
+ if (my $cache = $self->get_cache) {
+ if ($cache->[0] && $cache->[0]->related_resultset($rel)->get_cache) {
+ $new_cache = [ map { @{$_->related_resultset($rel)->get_cache} }
+ @$cache ];
+ }
+ }
+
+ my $rel_source = $self->result_source->related_source($rel);
+
+ my $new = do {
+
+ # The reason we do this now instead of passing the alias to the
+ # search_rs below is that if you wrap/overload resultset on the
+ # source you need to know what alias it's -going- to have for things
+ # to work sanely (e.g. RestrictWithObject wants to be able to add
+ # extra query restrictions, and these may need to be $alias.)
+
+ my $attrs = $rel_source->resultset_attributes;
+ local $attrs->{alias} = $alias;
+
+ $rel_source->resultset
+ ->search_rs(
+ undef, {
+ %attrs,
+ join => undef,
+ prefetch => undef,
+ select => undef,
+ as => undef,
+ where => $self->{cond},
+ seen_join => $seen,
+ from => $from,
+ });
+ };
+ $new->set_cache($new_cache) if $new_cache;
+ $new;
};
}
my $source = $self->result_source;
my $attrs = $self->{attrs};
- my $from = $attrs->{_parent_from}
+ my $from = $attrs->{from}
|| [ { $attrs->{alias} => $source->from } ];
my $seen = { %{$attrs->{seen_join}||{}} };
my $join = ($attrs->{join}
? [ $attrs->{join}, $extra_join ]
: $extra_join);
- push(@{$from},
- $source->resolve_join($join, $attrs->{alias}, $seen)
- );
+
+ # we need to take the prefetch the attrs into account before we
+ # ->resolve_join as otherwise they get lost - captainL
+ my $merged = $self->_merge_attr( $join, $attrs->{prefetch} );
+
+ $from = [
+ @$from,
+ ($join ? $source->resolve_join($merged, $attrs->{alias}, $seen) : ()),
+ ];
return ($from,$seen);
}
return $self->{_attrs} if $self->{_attrs};
my $attrs = { %{$self->{attrs}||{}} };
- my $source = $self->{result_source};
+ my $source = $self->result_source;
my $alias = $attrs->{alias};
$attrs->{columns} ||= delete $attrs->{cols} if exists $attrs->{cols};
} elsif (!$attrs->{select}) {
$attrs->{columns} = [ $source->columns ];
}
-
- $attrs->{select} ||= [
- map { m/\./ ? $_ : "${alias}.$_" } @{delete $attrs->{columns}}
- ];
- $attrs->{as} ||= [
- map { m/^\Q${alias}.\E(.+)$/ ? $1 : $_ } @{$attrs->{select}}
- ];
+
+ $attrs->{select} =
+ ($attrs->{select}
+ ? (ref $attrs->{select} eq 'ARRAY'
+ ? [ @{$attrs->{select}} ]
+ : [ $attrs->{select} ])
+ : [ map { m/\./ ? $_ : "${alias}.$_" } @{delete $attrs->{columns}} ]
+ );
+ $attrs->{as} =
+ ($attrs->{as}
+ ? (ref $attrs->{as} eq 'ARRAY'
+ ? [ @{$attrs->{as}} ]
+ : [ $attrs->{as} ])
+ : [ map { m/^\Q${alias}.\E(.+)$/ ? $1 : $_ } @{$attrs->{select}} ]
+ );
my $adds;
if ($adds = delete $attrs->{include_columns}) {
}
if ($adds = delete $attrs->{'+select'}) {
$adds = [$adds] unless ref $adds eq 'ARRAY';
- push(@{$attrs->{select}}, map { /\./ || ref $_ ? $_ : "${alias}.$_" } @$adds);
+ push(@{$attrs->{select}},
+ map { /\./ || ref $_ ? $_ : "${alias}.$_" } @$adds);
}
if (my $adds = delete $attrs->{'+as'}) {
$adds = [$adds] unless ref $adds eq 'ARRAY';
push(@{$attrs->{as}}, @$adds);
}
- $attrs->{from} ||= delete $attrs->{_parent_from}
- || [ { 'me' => $source->from } ];
+ $attrs->{from} ||= [ { 'me' => $source->from } ];
if (exists $attrs->{join} || exists $attrs->{prefetch}) {
my $join = delete $attrs->{join} || {};
$join = $self->_merge_attr(
$join, $attrs->{prefetch}
);
+
}
- push(@{$attrs->{from}},
- $source->resolve_join($join, $alias, { %{$attrs->{seen_join}||{}} })
- );
+ $attrs->{from} = # have to copy here to avoid corrupting the original
+ [
+ @{$attrs->{from}},
+ $source->resolve_join($join, $alias, { %{$attrs->{seen_join}||{}} })
+ ];
+
}
$attrs->{group_by} ||= $attrs->{select} if delete $attrs->{distinct};
if ($attrs->{order_by}) {
- $attrs->{order_by} = [ $attrs->{order_by} ] unless ref $attrs->{order_by};
+ $attrs->{order_by} = (ref($attrs->{order_by}) eq 'ARRAY'
+ ? [ @{$attrs->{order_by}} ]
+ : [ $attrs->{order_by} ]);
} else {
- $attrs->{order_by} ||= [];
+ $attrs->{order_by} = [];
}
my $collapse = $attrs->{collapse} || {};
if (my $prefetch = delete $attrs->{prefetch}) {
+ $prefetch = $self->_merge_attr({}, $prefetch);
my @pre_order;
+ my $seen = $attrs->{seen_join} || {};
foreach my $p (ref $prefetch eq 'ARRAY' ? @$prefetch : ($prefetch)) {
# bring joins back to level of current class
my @prefetch = $source->resolve_prefetch(
- $p, $alias, { %{$attrs->{seen_join}||{}} }, \@pre_order, $collapse
+ $p, $alias, $seen, \@pre_order, $collapse
);
push(@{$attrs->{select}}, map { $_->[0] } @prefetch);
push(@{$attrs->{as}}, map { $_->[1] } @prefetch);
}
$attrs->{collapse} = $collapse;
+ if ($attrs->{page}) {
+ $attrs->{offset} ||= 0;
+ $attrs->{offset} += ($attrs->{rows} * ($attrs->{page} - 1));
+ }
+
return $self->{_attrs} = $attrs;
}
+sub _rollout_attr {
+ my ($self, $attr) = @_;
+
+ if (ref $attr eq 'HASH') {
+ return $self->_rollout_hash($attr);
+ } elsif (ref $attr eq 'ARRAY') {
+ return $self->_rollout_array($attr);
+ } else {
+ return [$attr];
+ }
+}
+
+sub _rollout_array {
+ my ($self, $attr) = @_;
+
+ my @rolled_array;
+ foreach my $element (@{$attr}) {
+ if (ref $element eq 'HASH') {
+ push( @rolled_array, @{ $self->_rollout_hash( $element ) } );
+ } elsif (ref $element eq 'ARRAY') {
+ # XXX - should probably recurse here
+ push( @rolled_array, @{$self->_rollout_array($element)} );
+ } else {
+ push( @rolled_array, $element );
+ }
+ }
+ return \@rolled_array;
+}
+
+sub _rollout_hash {
+ my ($self, $attr) = @_;
+
+ my @rolled_array;
+ foreach my $key (keys %{$attr}) {
+ push( @rolled_array, { $key => $attr->{$key} } );
+ }
+ return \@rolled_array;
+}
+
+sub _calculate_score {
+ my ($self, $a, $b) = @_;
+
+ if (ref $b eq 'HASH') {
+ my ($b_key) = keys %{$b};
+ if (ref $a eq 'HASH') {
+ my ($a_key) = keys %{$a};
+ if ($a_key eq $b_key) {
+ return (1 + $self->_calculate_score( $a->{$a_key}, $b->{$b_key} ));
+ } else {
+ return 0;
+ }
+ } else {
+ return ($a eq $b_key) ? 1 : 0;
+ }
+ } else {
+ if (ref $a eq 'HASH') {
+ my ($a_key) = keys %{$a};
+ return ($b eq $a_key) ? 1 : 0;
+ } else {
+ return ($b eq $a) ? 1 : 0;
+ }
+ }
+}
+
sub _merge_attr {
my ($self, $a, $b) = @_;
- return $b unless $a;
+
+ return $b unless defined($a);
+ return $a unless defined($b);
- if (ref $b eq 'HASH' && ref $a eq 'HASH') {
- foreach my $key (keys %{$b}) {
- if (exists $a->{$key}) {
- $a->{$key} = $self->_merge_attr($a->{$key}, $b->{$key});
- } else {
- $a->{$key} = $b->{$key};
+ $a = $self->_rollout_attr($a);
+ $b = $self->_rollout_attr($b);
+
+ my $seen_keys;
+ foreach my $b_element ( @{$b} ) {
+ # find best candidate from $a to merge $b_element into
+ my $best_candidate = { position => undef, score => 0 }; my $position = 0;
+ foreach my $a_element ( @{$a} ) {
+ my $score = $self->_calculate_score( $a_element, $b_element );
+ if ($score > $best_candidate->{score}) {
+ $best_candidate->{position} = $position;
+ $best_candidate->{score} = $score;
}
+ $position++;
}
- return $a;
- } else {
- $a = [$a] unless ref $a eq 'ARRAY';
- $b = [$b] unless ref $b eq 'ARRAY';
-
- my $hash = {};
- my @array;
- foreach my $x ($a, $b) {
- foreach my $element (@{$x}) {
- if (ref $element eq 'HASH') {
- $hash = $self->_merge_attr($hash, $element);
- } elsif (ref $element eq 'ARRAY') {
- push(@array, @{$element});
- } else {
- push(@array, $element) unless $b == $x
- && grep { $_ eq $element } @array;
- }
+ my ($b_key) = ( ref $b_element eq 'HASH' ) ? keys %{$b_element} : ($b_element);
+ if ($best_candidate->{score} == 0 || exists $seen_keys->{$b_key}) {
+ push( @{$a}, $b_element );
+ } else {
+ $seen_keys->{$b_key} = 1; # don't merge the same key twice
+ my $a_best = $a->[$best_candidate->{position}];
+ # merge a_best and b_element together and replace original with merged
+ if (ref $a_best ne 'HASH') {
+ $a->[$best_candidate->{position}] = $b_element;
+ } elsif (ref $b_element eq 'HASH') {
+ my ($key) = keys %{$a_best};
+ $a->[$best_candidate->{position}] = { $key => $self->_merge_attr($a_best->{$key}, $b_element->{$key}) };
}
}
-
- @array = grep { !exists $hash->{$_} } @array;
-
- return keys %{$hash}
- ? ( scalar(@array)
- ? [$hash, @array]
- : $hash
- )
- : \@array;
}
+
+ return $a;
+}
+
+sub result_source {
+ my $self = shift;
+
+ if (@_) {
+ $self->_source_handle($_[0]->handle);
+ } else {
+ $self->_source_handle->resolve;
+ }
}
=head2 throw_exception
sub throw_exception {
my $self=shift;
- $self->result_source->schema->throw_exception(@_);
+ $self->_source_handle->schema->throw_exception(@_);
}
# XXX: FIXME: Attributes docs need clearing up
through directly to SQL, so you can give e.g. C<year DESC> for a
descending order on the column `year'.
-Please note that if you have quoting enabled (see
-L<DBIx::Class::Storage/quote_char>) you will need to do C<\'year DESC' > to
+Please note that if you have C<quote_char> enabled (see
+L<DBIx::Class::Storage::DBI/connect_info>) you will need to do C<\'year DESC' > to
specify an order. (The scalar ref causes it to be passed as raw sql to the DB,
so you will need to manually quote things as appropriate.)
});
would return all CDs and include a 'name' column to the information
-passed to object inflation
+passed to object inflation. Note that the 'artist' is the name of the
+column (or relationship) accessor, and 'name' is the name of the column
+accessor in the related table.
=head2 select
=back
-Indicates column names for object inflation. This is used in conjunction with
-C<select>, usually when C<select> contains one or more function or stored
+Indicates column names for object inflation. That is, c< as >
+indicates the name that the column can be accessed as via the
+C<get_column> method (or via the object accessor, B<if one already
+exists>). It has nothing to do with the SQL code C< SELECT foo AS bar
+>.
+
+The C<as> attribute is used in conjunction with C<select>,
+usually when C<select> contains one or more function or stored
procedure names:
$rs = $schema->resultset('Employee')->search(undef, {
You can create your own accessors if required - see
L<DBIx::Class::Manual::Cookbook> for details.
-Please note: This will NOT insert an C<AS employee_count> into the SQL statement
-produced, it is used for internal access only. Thus attempting to use the accessor
-in an C<order_by> clause or similar will fail misrably.
+Please note: This will NOT insert an C<AS employee_count> into the SQL
+statement produced, it is used for internal access only. Thus
+attempting to use the accessor in an C<order_by> clause or similar
+will fail miserably.
+
+To get around this limitation, you can supply literal SQL to your
+C<select> attibute that contains the C<AS alias> text, eg:
+
+ select => [\'myfield AS alias']
=head2 join
}
);
+You need to use the relationship (not the table) name in conditions,
+because they are aliased as such. The current table is aliased as "me", so
+you need to use me.column_name in order to avoid ambiguity. For example:
+
+ # Get CDs from 1984 with a 'Foo' track
+ my $rs = $schema->resultset('CD')->search(
+ {
+ 'me.year' => 1984,
+ 'tracks.name' => 'Foo'
+ },
+ { join => 'tracks' }
+ );
+
If the same join is supplied twice, it will be aliased to <rel>_2 (and
similarly for a third time). For e.g.
=back
-Contains one or more relationships that should be fetched along with the main
-query (when they are accessed afterwards they will have already been
-"prefetched"). This is useful for when you know you will need the related
-objects, because it saves at least one query:
+Contains one or more relationships that should be fetched along with
+the main query (when they are accessed afterwards the data will
+already be available, without extra queries to the database). This is
+useful for when you know you will need the related objects, because it
+saves at least one query:
my $rs = $schema->resultset('Tag')->search(
undef,