Esmith::DB::Record

NAME

esmith::DB::Record - an individual record in an E-Smith database In a root terminal you can do the command below if you want to display the up-to-date content

perldoc esmith::DB::Record

SYNOPSIS

DO NOT USE THIS CLASS DIRECTLY! use via esmith::DB.

          my $key  = $record->key;

          my %properties = $record->props;

          my $value = $record->prop($prop_key);
                      $record->set_prop($prop_key, $prop_val);

          my $value = $record->delete_prop($prop_key);

          $record->merge_props(%more_properties);
          $record->reset_props(%new_properties);

          $record->delete;

          print $record->show;

DESCRIPTION

This class is a general interface to individual records in esmith::DB databases. It should not be used directly, but rather esmith::DBs should hand you esmith::DB::Record objects.

Each subclass of esmith::DB will also have to subclass and implement an esmith::DB::Record subclass.

Virtual Methods

key

            my $key = $record->key;

Returns the $key for this $record;

props

            my %properties = $record->props;
            my $num_props  = $record->props;

Returns a hash of all the properties for this $record. In scalar context it will return the number of properties this $record has.

prop

set_prop

            my $value = $record->prop($property);
                        $record->set_prop($property, $value);

Gets/sets the $value of the $property in this $record.

set_prop() will die if the database is read-only.

delete_prop

            my $value = $record->delete_prop($property);

Deletes a $property from the $record, returning the old $value. delete_prop() will die if the database is read-only.

merge_props

            $record->merge_props(%properties);

Adds the %properties to the $records existing properties. Any new keys will be added, any existing keys will be overwritten.

merge_props() will die if the database is read-only.

{
   my $popd = $DB->get("popd") or return;
   my $pop3 = $DB->get("pop3") ||   $DB->new_record("pop3", { type => "service" });
   $pop3->merge_props($popd->props);
   $popd->delete;
}

reset_props

            $record->reset_props(%properties);

Replaces the $record’s properties with the contents of %properties. Any old properties will be deleted.

reset_props() will die if the database is read-only.

delete

            $record->delete;

Deletes the $record from its database.

delete() will die if the database is read-only.

Concrete methods

show

            my $formatted = $record->show;

Returns the $record’s key and properties in a nice, human readable format suitable for printing.

SEE ALSO

esmith::DB