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package Pinwheel::Model::Base; |
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=head1 NAME |
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Pinwheel::Model::Base - Base class for PinWheel models |
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=head1 SYNOPSIS |
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# Given $obj which is some PinWheel model... |
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$obj->has_key($column_name); |
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$column_names = $obj->keys; # unordered array ref |
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$value = $obj->get($key); |
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$sql_param = $obj->sql_param; |
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@route_params = $obj->route_param; |
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=head1 DESCRIPTION |
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=over 4 |
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=cut |
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use Carp qw(confess); |
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use Class::ISA; |
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use Pinwheel::Database qw(prepare); |
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sub new |
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{ |
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my ($class, $model, $data) = @_; |
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my ($ctx, $key, $obj); |
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$ctx = Pinwheel::Context::get('Model--' . $model->{table}); |
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$obj = $ctx->{$key} if ($key = $data->{id}); |
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if ($obj) { |
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$obj->{data} = {%{$obj->{data}}, %$data}; |
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} else { |
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$obj = bless {model => $model, data => $data}, $class; |
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$ctx->{$key} = $obj if ($key); |
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} |
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return $obj; |
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} |
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sub STORABLE_freeze |
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{ |
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my ($obj, $cloning) = @_; |
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return Storable::freeze($obj->{data}); |
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} |
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sub STORABLE_attach |
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{ |
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my ($class, $cloning, $data) = @_; |
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return new($class, \%{"$class\::model"}, Storable::thaw($data)); |
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} |
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=item $bool = $obj-Ehas_key($key) |
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Returns true iff C<$obj> has a key named C<$key>. If the column hasn't been |
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fetched yet, C returns false. |
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=cut |
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sub has_key { exists($_[0]->{data}{$_[1]}) } |
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=item $keys = $obj-Ekeys |
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Return an (unordered) list of the current data keys in the model object. This |
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only includes the columns where data has been fetched. |
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=cut |
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sub keys { return [ keys(%{$_[0]->{data}}) ] } |
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=item $value = $obj-Eget($key) |
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TODO, document me. |
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=cut |
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sub get |
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{ |
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my ($self, $key) = @_; |
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my ($getter); |
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$getter = $self->{model}{getters}{$key}; |
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return $getter ? $self->$getter() : $self->{data}{$key}; |
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} |
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sub _prefetched_link |
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{ |
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my ($self, $key, $data) = @_; |
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my ($pkg, $model, $obj); |
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$pkg = $self->{model}{associations}{$key}; |
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$pkg = $self->_inherit_association($key) if !defined($pkg); |
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confess "Unknown relation $key" if !defined($pkg); |
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$model = $pkg->{model}; |
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confess "Unable to resolve relation $key" if !defined($model); |
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if (defined($data->{id})) { |
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$model = Pinwheel::Model::_find_inherited_model($model, $data); |
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$obj = Pinwheel::Model::Base::new($model->{model_class}, $model, $data); |
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} |
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$self->{data}{$key} = $obj; |
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} |
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sub _inherit_association |
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{ |
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my ($self, $key) = @_; |
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my ($classname, $pkg); |
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foreach $classname (Class::ISA::super_path(ref($self))) { |
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$pkg = \%::; |
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$pkg = $pkg->{"$_\::"} foreach split(/::/, $classname); |
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if (defined($pkg->{model})) { |
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$pkg = $pkg->{model}{associations}{$key}; |
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} else { |
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$pkg = undef; |
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} |
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last if defined($pkg); |
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} |
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$self->{model}{associations}{$key} = $pkg; |
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return $pkg; |
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} |
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sub _fill_out |
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{ |
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my $self = shift; |
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my ($data, $sth, $row, $key); |
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$data = $self->{data}; |
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$sth = prepare("SELECT * FROM `$self->{model}{table}` WHERE id = ?"); |
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$sth->execute($data->{id}); |
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$row = $sth->fetchrow_hashref(); |
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foreach $key (CORE::keys %{$self->{model}{fields}}) { |
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$data->{$key} = $row->{$key} unless exists($data->{$key}); |
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} |
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} |
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=item $sql_param = $obj-Esql_param |
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Turns C<$obj> into a SQL query parameter; see L. |
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Default: C<$obj-Eid>. |
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=cut |
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sub sql_param { $_[0]->id } |
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=item @route_params = $obj-Eroute_param |
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Turns C<$obj> into route parameter(s); see L. |
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Default: C<$obj-Eid>. |
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=cut |
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sub route_param { $_[0]->id } |
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sub DESTROY { } |
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=back |
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167
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=head1 AUTHOR |
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A&M Network Publishing |
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=cut |
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1; |