use Storable;
use Scalar::Util qw/weaken/;
+use DBIx::Class::ResultSetColumn;
use base qw/DBIx::Class/;
__PACKAGE__->load_components(qw/AccessorGroup/);
__PACKAGE__->mk_group_accessors('simple' => qw/result_source result_class/);
=back
-Finds a row based on its primary key or unique constraint. For example:
+Finds a row based on its primary key or unique constraint. For example, to find
+a row by its primary key:
my $cd = $schema->resultset('CD')->find(5);
-Also takes an optional C<key> attribute, to search by a specific key or unique
-constraint. For example:
+You can also find a row by a specific key or unique constraint by specifying
+the C<key> attribute. For example:
+
+ my $cd = $schema->resultset('CD')->find('Massive Attack', 'Mezzanine', { key => 'artist_title' });
+
+Additionally, you can specify the columns explicitly by name:
my $cd = $schema->resultset('CD')->find(
{
{ key => 'artist_title' }
);
-See also L</find_or_create> and L</update_or_create>.
+If no C<key> is specified and you explicitly name columns, it searches on all
+unique constraints defined on the source, including the primary key.
+
+If the C<key> is specified as C<primary>, it searches only on the primary key.
+
+See also L</find_or_create> and L</update_or_create>. For information on how to
+declare unique constraints, see
+L<DBIx::Class::ResultSource/add_unique_constraint>.
=cut
my ($self, @vals) = @_;
my $attrs = (@vals > 1 && ref $vals[$#vals] eq 'HASH' ? pop(@vals) : {});
- my @cols = $self->result_source->primary_columns;
- if (exists $attrs->{key}) {
- my %uniq = $self->result_source->unique_constraints;
+ # Build a list of queries
+ my @unique_hashes;
+
+ if (ref $vals[0] eq 'HASH') {
+ my @constraint_names = exists $attrs->{key}
+ ? ($attrs->{key})
+ : $self->result_source->unique_constraint_names;
$self->throw_exception(
- "Unknown key $attrs->{key} on '" . $self->result_source->name . "'"
- ) unless exists $uniq{$attrs->{key}};
- @cols = @{ $uniq{$attrs->{key}} };
+ "Can't find by explicitly named columns unless a primary key or unique constraint is defined"
+ ) unless @constraint_names;
+
+ foreach my $name (@constraint_names) {
+ my @unique_cols = $self->result_source->unique_constraint_columns($name);
+ my $unique_hash = $self->_unique_hash($vals[0], \@unique_cols);
+
+ # TODO: Check that the ResultSet defines the rest of the query
+ push @unique_hashes, $unique_hash
+ if scalar keys %$unique_hash;# == scalar @unique_cols;
+ }
}
- #use Data::Dumper; warn Dumper($attrs, @vals, @cols);
- $self->throw_exception(
- "Can't find unless a primary key or unique constraint is defined"
- ) unless @cols;
+ else {
+ my @unique_cols = exists $attrs->{key}
+ ? $self->result_source->unique_constraint_columns($attrs->{key})
+ : $self->result_source->primary_columns;
+ $self->throw_exception(
+ "Can't find unless a primary key is defined or a unique constraint is specified"
+ ) unless @unique_cols;
- my $query;
- if (ref $vals[0] eq 'HASH') {
- $query = { %{$vals[0]} };
- } elsif (@cols == @vals) {
- $query = {};
- @{$query}{@cols} = @vals;
- } else {
- $query = {@vals};
+ if (@vals == @unique_cols) {
+ my %unique_hash;
+ @unique_hash{@unique_cols} = @vals;
+ push @unique_hashes, \%unique_hash;
+ }
+ else {
+ # Hack for CDBI queries
+ my %hash = @vals;
+ push @unique_hashes, \%hash;
+ }
}
- foreach my $key (grep { ! m/\./ } keys %$query) {
- $query->{"$self->{attrs}{alias}.$key"} = delete $query->{$key};
+
+ # Add the ResultSet's alias
+ foreach my $unique_hash (@unique_hashes) {
+ foreach my $key (grep { ! m/\./ } keys %$unique_hash) {
+ $unique_hash->{"$self->{attrs}{alias}.$key"} = delete $unique_hash->{$key};
+ }
}
- #warn Dumper($query);
-
+
+ # Handle cases where the ResultSet already defines the query
+ my $query = @unique_hashes ? \@unique_hashes : undef;
+
if (keys %$attrs) {
- my $rs = $self->search($query,$attrs);
- return keys %{$rs->{collapse}} ? $rs->next : $rs->single;
- } else {
- return keys %{$self->{collapse}} ?
- $self->search($query)->next :
- $self->single($query);
+ my $rs = $self->search($query, $attrs);
+ return keys %{$rs->{collapse}} ? $rs->next : $rs->single;
+ }
+ else {
+ return keys %{$self->{collapse}}
+ ? $self->search($query)->next
+ : $self->single($query);
}
}
+# _unique_hash
+#
+# Constrain the specified hash based on the specific column names.
+
+sub _unique_hash {
+ my ($self, $hash, $unique_cols) = @_;
+
+ # Ugh, CDBI lowercases column names
+ if (exists $INC{'DBIx/Class/CDBICompat/ColumnCase.pm'}) {
+ foreach my $key (keys %$hash) {
+ $hash->{lc $key} = delete $hash->{$key};
+ }
+ }
+
+ my %unique_hash =
+ map { $_ => $hash->{$_} }
+ grep { exists $hash->{$_} }
+ @$unique_cols;
+
+ return \%unique_hash;
+}
+
=head2 search_related
=over 4
my $cd = $schema->resultset('CD')->single({ year => 2001 });
Inflates the first result without creating a cursor if the resultset has
-any records in it; if not returns nothing. Used by find() as an optimisation.
+any records in it; if not returns nothing. Used by L</find> as an optimisation.
=cut
return (@data ? $self->_construct_object(@data) : ());
}
+=head2 get_column
+
+=over 4
+
+=item Arguments: $cond?
+
+=item Return Value: $resultsetcolumn
+
+=back
+
+ my $max_length = $rs->get_column('length')->max;
+
+Returns a ResultSetColumn instance for $column based on $self
+
+=cut
+
+sub get_column {
+ my ($self, $column) = @_;
+
+ my $new = DBIx::Class::ResultSetColumn->new($self, $column);
+ return $new;
+}
=head2 search_like
sub slice {
my ($self, $min, $max) = @_;
- my $attrs = { %{ $self->{attrs} || {} } };
- $attrs->{offset} ||= 0;
+ my $attrs = {}; # = { %{ $self->{attrs} || {} } };
+ $attrs->{offset} = $self->{attrs}{offset} || 0;
$attrs->{offset} += $min;
$attrs->{rows} = ($max ? ($max - $min + 1) : 1);
- my $slice = (ref $self)->new($self->result_source, $attrs);
- return (wantarray ? $slice->all : $slice);
+ return $self->search(undef(), $attrs);
+ #my $slice = (ref $self)->new($self->result_source, $attrs);
+ #return (wantarray ? $slice->all : $slice);
}
=head2 next
return $_[0]->reset->next;
}
+# _cond_for_update_delete
+#
+# update/delete require the condition to be modified to handle
+# the differing SQL syntax available. This transforms the $self->{cond}
+# appropriately, returning the new condition.
+
+sub _cond_for_update_delete {
+ my ($self) = @_;
+ my $cond = {};
+
+ if (!ref($self->{cond})) {
+ # No-op. No condition, we're updating/deleting everything
+ }
+ elsif (ref $self->{cond} eq 'ARRAY') {
+ $cond = [
+ map {
+ my %hash;
+ foreach my $key (keys %{$_}) {
+ $key =~ /([^.]+)$/;
+ $hash{$1} = $_->{$key};
+ }
+ \%hash;
+ } @{$self->{cond}}
+ ];
+ }
+ elsif (ref $self->{cond} eq 'HASH') {
+ if ((keys %{$self->{cond}})[0] eq '-and') {
+ $cond->{-and} = [];
+
+ my @cond = @{$self->{cond}{-and}};
+ for (my $i = 0; $i < @cond - 1; $i++) {
+ my $entry = $cond[$i];
+
+ my %hash;
+ if (ref $entry eq 'HASH') {
+ foreach my $key (keys %{$entry}) {
+ $key =~ /([^.]+)$/;
+ $hash{$1} = $entry->{$key};
+ }
+ }
+ else {
+ $entry =~ /([^.]+)$/;
+ $hash{$entry} = $cond[++$i];
+ }
+
+ push @{$cond->{-and}}, \%hash;
+ }
+ }
+ else {
+ foreach my $key (keys %{$self->{cond}}) {
+ $key =~ /([^.]+)$/;
+ $cond->{$1} = $self->{cond}{$key};
+ }
+ }
+ }
+ else {
+ $self->throw_exception(
+ "Can't update/delete on resultset with condition unless hash or array"
+ );
+ }
+
+ return $cond;
+}
+
+
=head2 update
=over 4
my ($self, $values) = @_;
$self->throw_exception("Values for update must be a hash")
unless ref $values eq 'HASH';
+
+ my $cond = $self->_cond_for_update_delete;
+
return $self->result_source->storage->update(
- $self->result_source->from, $values, $self->{cond}
+ $self->result_source->from, $values, $cond
);
}
my ($self) = @_;
my $del = {};
- if (!ref($self->{cond})) {
-
- # No-op. No condition, we're deleting everything
-
- } elsif (ref $self->{cond} eq 'ARRAY') {
-
- $del = [ map { my %hash;
- foreach my $key (keys %{$_}) {
- $key =~ /([^.]+)$/;
- $hash{$1} = $_->{$key};
- }; \%hash; } @{$self->{cond}} ];
-
- } elsif (ref $self->{cond} eq 'HASH') {
-
- if ((keys %{$self->{cond}})[0] eq '-and') {
+ my $cond = $self->_cond_for_update_delete;
- $del->{-and} = [ map { my %hash;
- foreach my $key (keys %{$_}) {
- $key =~ /([^.]+)$/;
- $hash{$1} = $_->{$key};
- }; \%hash; } @{$self->{cond}{-and}} ];
-
- } else {
-
- foreach my $key (keys %{$self->{cond}}) {
- $key =~ /([^.]+)$/;
- $del->{$1} = $self->{cond}{$key};
- }
- }
-
- } else {
- $self->throw_exception(
- "Can't delete on resultset with condition unless hash or array"
- );
- }
-
- $self->result_source->storage->delete($self->result_source->from, $del);
+ $self->result_source->storage->delete($self->result_source->from, $cond);
return 1;
}
return $obj;
}
+=head2 find_or_new
+
+=over 4
+
+=item Arguments: \%vals, \%attrs?
+
+=item Return Value: $object
+
+=back
+
+Find an existing record from this resultset. If none exists, instantiate a new
+result object and return it. The object will not be saved into your storage
+until you call L<DBIx::Class::Row/insert> on it.
+
+If you want objects to be saved immediately, use L</find_or_create> instead.
+
+=cut
+
+sub find_or_new {
+ my $self = shift;
+ my $attrs = (@_ > 1 && ref $_[$#_] eq 'HASH' ? pop(@_) : {});
+ my $hash = ref $_[0] eq 'HASH' ? shift : {@_};
+ my $exists = $self->find($hash, $attrs);
+ return defined $exists ? $exists : $self->new_result($hash);
+}
+
=head2 create
=over 4
{ key => 'artist_title' }
);
-See also L</find> and L</update_or_create>.
+See also L</find> and L</update_or_create>. For information on how to declare
+unique constraints, see L<DBIx::Class::ResultSource/add_unique_constraint>.
=cut
If the C<key> is specified as C<primary>, it searches only on the primary key.
-See also L</find> and L</find_or_create>.
+See also L</find> and L</find_or_create>. For information on how to declare
+unique constraints, see L<DBIx::Class::ResultSource/add_unique_constraint>.
=cut
my $attrs = (@_ > 1 && ref $_[$#_] eq 'HASH' ? pop(@_) : {});
my $hash = ref $_[0] eq 'HASH' ? shift : {@_};
- my %unique_constraints = $self->result_source->unique_constraints;
- my @constraint_names = (exists $attrs->{key}
- ? ($attrs->{key})
- : keys %unique_constraints);
-
- my @unique_hashes;
- foreach my $name (@constraint_names) {
- my @unique_cols = @{ $unique_constraints{$name} };
- my %unique_hash =
- map { $_ => $hash->{$_} }
- grep { exists $hash->{$_} }
- @unique_cols;
-
- push @unique_hashes, \%unique_hash
- if (scalar keys %unique_hash == scalar @unique_cols);
- }
-
- if (@unique_hashes) {
- my $row = $self->single(\@unique_hashes);
- if (defined $row) {
- $row->set_columns($hash);
- $row->update;
- return $row;
- }
+ my $row = $self->find($hash, $attrs);
+ if (defined $row) {
+ $row->set_columns($hash);
+ $row->update;
+ return $row;
}
return $self->create($hash);
projects / dbsrgits/DBIx-Class.git / blobdiff