use warnings;
use DBIx::Class::ResultSet;
+use Data::Page;
-use base qw/Class::Data::Inheritable/;
+use base qw/DBIx::Class/;
__PACKAGE__->mk_classdata('_columns' => {});
=head1 DESCRIPTION
-This class is responsible for defining and doing basic operations on
-L<DBIx::Class> objects.
+This class is responsible for defining and doing table-level operations on
+L<DBIx::Class> classes.
=head1 METHODS
-=over 4
-
-=item new
-
- my $obj = My::Class->new($attrs);
-
-Creates a new object from column => value mappings passed as a hash ref
-
-=cut
-
-sub new {
- my ($class, $attrs) = @_;
- $class = ref $class if ref $class;
- my $new = bless({ _column_data => { } }, $class);
- if ($attrs) {
- $new->throw("attrs must be a hashref" ) unless ref($attrs) eq 'HASH';
- while (my ($k, $v) = each %{$attrs}) {
- $new->store_column($k => $v);
- }
- }
- return $new;
-}
-
-=item insert
-
- $obj->insert;
-
-Inserts an object into the database if it isn't already in there. Returns
-the object itself.
-
-=cut
-
-sub insert {
- my ($self) = @_;
- return $self if $self->in_storage;
- #use Data::Dumper; warn Dumper($self);
- my %in;
- $in{$_} = $self->get_column($_)
- for grep { defined $self->get_column($_) } $self->columns;
- my %out = %{ $self->storage->insert($self->_table_name, \%in) };
- $self->store_column($_, $out{$_})
- for grep { $self->get_column($_) ne $out{$_} } keys %out;
- $self->in_storage(1);
- $self->{_dirty_columns} = {};
- return $self;
-}
-
-=item in_storage
-
- $obj->in_storage; # Get value
- $obj->in_storage(1); # Set value
-
-Indicated whether the object exists as a row in the database or not
-
-=cut
-
-sub in_storage {
- my ($self, $val) = @_;
- $self->{_in_storage} = $val if @_ > 1;
- return $self->{_in_storage};
-}
-
-=item create
-
- my $new = My::Class->create($attrs);
-
-A shortcut for My::Class->new($attrs)->insert;
-
-=cut
-
-sub create {
- my ($class, $attrs) = @_;
- $class->throw( "create needs a hashref" ) unless ref $attrs eq 'HASH';
- return $class->new($attrs)->insert;
-}
-
-=item update
-
- $obj->update;
-
-Must be run on an object that is already in the database; issues an SQL
-UPDATE query to commit any changes to the object to the db if required.
-
-=cut
-
-sub update {
- my ($self, $upd) = @_;
- $self->throw( "Not in database" ) unless $self->in_storage;
- my %to_update = %{$upd || {}};
- $to_update{$_} = $self->get_column($_) for $self->is_changed;
- return -1 unless keys %to_update;
- my $rows = $self->storage->update($self->_table_name, \%to_update,
- $self->ident_condition);
- if ($rows == 0) {
- $self->throw( "Can't update ${self}: row not found" );
- } elsif ($rows > 1) {
- $self->throw("Can't update ${self}: updated more than one row");
- }
- $self->{_dirty_columns} = {};
- return $self;
-}
-
-sub ident_condition {
- my ($self) = @_;
- my %cond;
- $cond{$_} = $self->get_column($_) for keys %{$self->_primaries};
- return \%cond;
-}
-
-=item delete
-
- $obj->delete
-
-Deletes the object from the database. The object is still perfectly usable
-accessor-wise etc. but ->in_storage will now return 0 and the object must
-be re ->insert'ed before it can be ->update'ed
-
-=cut
-
-sub delete {
- my $self = shift;
- if (ref $self) {
- $self->throw( "Not in database" ) unless $self->in_storage;
- #warn $self->_ident_cond.' '.join(', ', $self->_ident_values);
- $self->storage->delete($self->_table_name, $self->ident_condition);
- $self->in_storage(undef);
- #$self->store_column($_ => undef) for $self->primary_columns;
- # Should probably also arrange to trash PK if auto
- # but if we do, post-delete cascade triggers fail :/
- } else {
- my $attrs = { };
- if (@_ > 1 && ref $_[$#_] eq 'HASH') {
- $attrs = { %{ pop(@_) } };
- }
- my $query = (ref $_[0] eq 'HASH' ? $_[0] : {@_});
- $self->storage->delete($self->_table_name, $query);
- }
- return $self;
-}
-
-=item get_column
-
- my $val = $obj->get_column($col);
-
-Fetches a column value
-
-=cut
-
-sub get_column {
- my ($self, $column) = @_;
- $self->throw( "Can't fetch data as class method" ) unless ref $self;
- $self->throw( "No such column '${column}'" ) unless $self->_columns->{$column};
- return $self->{_column_data}{$column}
- if exists $self->{_column_data}{$column};
- return undef;
-}
-
-=item set_column
-
- $obj->set_column($col => $val);
-
-Sets a column value; if the new value is different to the old the column
-is marked as dirty for when you next call $obj->update
-
-=cut
-
-sub set_column {
- my $self = shift;
- my ($column) = @_;
- my $old = $self->get_column($column);
- my $ret = $self->store_column(@_);
- $self->{_dirty_columns}{$column} = 1 unless defined $old && $old eq $ret;
- return $ret;
-}
-
-=item store_column
-
- $obj->store_column($col => $val);
-
-Sets a column value without marking it as dirty
-
=cut
-sub store_column {
- my ($self, $column, $value) = @_;
- $self->throw( "No such column '${column}'" )
- unless $self->_columns->{$column};
- $self->throw( "set_column called for ${column} without value" )
- if @_ < 3;
- return $self->{_column_data}{$column} = $value;
-}
-
sub _register_columns {
my ($class, @cols) = @_;
my $names = { %{$class->_columns} };
$class->mk_group_accessors('column' => @cols);
}
-=item add_columns
+=head2 add_columns
__PACKAGE__->add_columns(qw/col1 col2 col3/);
-Adds columns to the current package, and creates accessors for them
+Adds columns to the current class and creates accessors for them.
=cut
$class->_mk_column_accessors(@cols);
}
-=item search_literal
+=head2 search_literal
my @obj = $class->search_literal($literal_where_cond, @bind);
my $cursor = $class->search_literal($literal_where_cond, @bind);
return $class->search(\$cond, $attrs);
}
-=item count_literal
+=head2 count_literal
my $count = $class->count_literal($literal_where_cond);
=cut
sub count_literal {
- my ($class, $cond, @vals) = @_;
- $cond =~ s/^\s*WHERE//i;
- my $attrs = (ref $vals[$#vals] eq 'HASH' ? pop(@vals) : {});
- $attrs->{bind} = [ @vals ];
- return $class->count($cond, $attrs);
+ my $class = shift;
+ return $class->search_literal(@_)->count;
}
-=item count
+=head2 count
my $count = $class->count({ foo => 3 });
sub count {
my $class = shift;
- my $attrs = { };
- if (@_ > 1 && ref $_[$#_] eq 'HASH') {
- $attrs = { %{ pop(@_) } };
- }
- my $query = ref $_[0] eq "HASH" || (@_ == 1) ? shift: {@_};
- my @cols = 'COUNT(*)';
- my $cursor = $class->storage->select($class->_table_name, \@cols,
- $query, $attrs);
- return ($cursor->next)[0];
+ return $class->search(@_)->count;
}
-sub cursor_to_resultset {
- my ($class, $sth, $args, $cols, $attrs) = @_;
- my $rs_class = $class->_resultset_class;
- eval "use $rs_class;";
- my $rs = $rs_class->new($class, $sth, $args, $cols, $attrs);
- return (wantarray ? $rs->all : $rs);
-}
+=head2 search
-sub _row_to_object { # WARNING: Destructive to @$row
- my ($class, $cols, $row) = @_;
- my $new = $class->new;
- $new->store_column($_, shift @$row) for @$cols;
- $new->in_storage(1);
- return $new;
-}
+ my @obj = $class->search({ foo => 3 }); # "... WHERE foo = 3"
+ my $cursor = $class->search({ foo => 3 });
-=item search
+To retrieve all rows, simply call C<search()> with no condition parameter,
- my @obj = $class->search({ foo => 3 });
- my $cursor = $class->search({ foo => 3 });
+ my @all = $class->search(); # equivalent to search({})
+
+If you need to pass in additional attributes (see
+L<DBIx::Class::ResultSet/Attributes> for details) an empty hash indicates
+no condition,
+
+ my @all = $class->search({}, { cols => [qw/foo bar/] }); # "SELECT foo, bar FROM $class_table"
=cut
if (@_ > 1 && ref $_[$#_] eq 'HASH') {
$attrs = { %{ pop(@_) } };
}
- my $query = (@_ == 1 || ref $_[0] eq "HASH" ? shift: {@_});
- my @cols = $class->_select_columns;
- return $class->cursor_to_resultset(undef, $attrs->{bind}, \@cols,
- { where => $query, %$attrs });
+ $attrs->{where} = (@_ == 1 || ref $_[0] eq "HASH" ? shift: {@_});
+
+ my $rs = $class->resultset($attrs);
+
+ return (wantarray ? $rs->all : $rs);
+}
+
+sub resultset {
+ my $class = shift;
+
+ my $rs_class = $class->_resultset_class;
+ eval "use $rs_class;";
+ my $rs = $rs_class->new($class, @_);
}
-=item search_like
+=head2 search_like
Identical to search except defaults to 'LIKE' instead of '=' in condition
return keys %{$_[0]->_columns};
}
-=item copy
-
- my $copy = $orig->copy({ change => $to, ... });
-
-=cut
-
-sub copy {
- my ($self, $changes) = @_;
- my $new = bless({ _column_data => { %{$self->{_column_data}}} }, ref $self);
- $new->set_column($_ => $changes->{$_}) for keys %$changes;
- return $new->insert;
-}
-
-#sub _cond_resolve {
-# my ($self, $query, $attrs) = @_;
-# return '1 = 1' unless keys %$query;
-# my $op = $attrs->{'cmp'} || '=';
-# my $cond = join(' AND ',
-# map { (defined $query->{$_}
-# ? "$_ $op ?"
-# : (do { delete $query->{$_}; "$_ IS NULL"; }));
-# } keys %$query);
-# return ($cond, values %$query);
-#}
-
-=item table
+=head2 table
__PACKAGE__->table('tbl_name');
+
+Gets or sets the table name.
=cut
shift->_table_name(@_);
}
-=item find_or_create
+=head2 find_or_create
$class->find_or_create({ key => $val, ... });
Searches for a record matching the search condition; if it doesn't find one,
-creates one and returns that instead
+creates one and returns that instead.
=cut
sub find_or_create {
my $class = shift;
my $hash = ref $_[0] eq "HASH" ? shift: {@_};
- my ($exists) = $class->search($hash);
+ my $exists = $class->find($hash);
return defined($exists) ? $exists : $class->create($hash);
}
-=item insert_or_update
-
- $obj->insert_or_update
-
-Updates the object if it's already in the db, else inserts it
-
-=cut
+=head2 has_column
+
+ if ($obj->has_column($col)) { ... }
+
+Returns 1 if the class has a column of this name, 0 otherwise.
+
+=cut
-sub insert_or_update {
- my $self = shift;
- return ($self->in_storage ? $self->update : $self->insert);
+sub has_column {
+ my ($self, $column) = @_;
+ return exists $self->_columns->{$column};
}
-=item is_changed
+=head2 column_info
+
+ my $info = $obj->column_info($col);
+
+Returns the column metadata hashref for a column.
+
+=cut
- my @changed_col_names = $obj->is_changed
+sub column_info {
+ my ($self, $column) = @_;
+ die "No such column $column" unless exists $self->_columns->{$column};
+ return $self->_columns->{$column};
+}
-=cut
+=head2 columns
+
+ my @column_names = $obj->columns;
+
+=cut
-sub is_changed {
- return keys %{shift->{_dirty_columns} || {}};
+sub columns {
+ die "columns() is a read-only accessor, did you mean add_columns()?" if (@_ > 1);
+ return keys %{shift->_columns};
}
-sub columns { return keys %{shift->_columns}; }
-
1;
-=back
-
=head1 AUTHORS
-Matt S. Trout <perl-stuff@trout.me.uk>
+Matt S. Trout <mst@shadowcatsystems.co.uk>
=head1 LICENSE
projects / dbsrgits/DBIx-Class.git / blobdiff