class MapPage extends Page {
static $db = array(
    //   'apiKey'       =>    'Varchar(255)',
      'centLat'         =>   'Float',
      'centLong'      =>   'Float',
      'zoom'            =>   'Int',
      'width'            =>   'Int',
      'height'         =>   'Int'
);
   
    static $has_one = array(
    );
   
    static $has_many = array(
    );
   
static $many_many = array(
       'Points'          =>   'Point'
);
   
    function getCMSFields() {
       $fields = parent::getCMSFields();
      
       $tablefield = new ManyManyComplexTableField(
                $this,
                'Points',
                'Point',
                array(
                  'Name'                => 'Name'/*,
                  'Lat'                => 'Latitude',
                  'Long'                => 'Longitude'*/
                ),
                'getCMSFields_forPopup'/**/
            );
         //$tablefield->setAddTitle( 'A Point' );
         //$tablefield->setParentClass('MapPage');
   
            
   
   
       //$fields->addFieldToTab('Root.Content.GoogleMap', new TextField('apiKey'));
       $fields->addFieldToTab( 'Root.Content.GoogleMap', new HeaderField( 'Google Maps Settings' ) );
       $fields->addFieldsToTab('Root.Content.GoogleMap', array(
             new TextField('centLat'),
             new TextField('centLong'),
            new TextField('zoom'),
            new TextField('width'),
            new TextField('height')//,
            //$tablefield
             )
         );/**/
       //$fields->addFieldToTab('Root.Content.GoogleMapPoints');
       $fields->addFieldToTab( 'Root.Content.Points', new HeaderField( 'Points on Map' ) );
       $fields->addFieldToTab( 'Root.Content.Points', $tablefield);
      // $fields->addFieldToTab('Root.Content.MapPoints', $tablefield);
            
       return $fields;
   }

}

class MapPage_Controller extends Page_Controller {
   function Content() {
      
         global $GMaps_API_Key;
         
         ContentNegotiator::disable();
         Requirements::css("maps/css/Maps.css");
         Requirements::javascript("http://maps.google.com/maps?file=api&v=2&key=".$GMaps_API_Key);
         
         $dbData = DataObject::get("Point", "`MapPageID` = '{$this->ID}'","",
            " LEFT JOIN `MapPage_Points` ON `PointID` = `Point`.ID");
         
         $map = new GMap('MyMap', $dbData , new GMapPoint($this->centLat ,$this->centLong), $this->zoom, $this->width, $this->height);
         return $this->Content.$map->display();
      
}/**/

}

class Point extends DataObject {

static $db = array(
'Name' => 'Varchar',
'Lat' => 'Float',
'Long' => 'Float'
);
   
    static $belongs_many_many = array(
'MapPages' => 'MapPage'
);

function getCMSFields_forPopup() {
$fields = new FieldSet();
$fields->push( new TextField( 'Name' ) );
$fields->push( new TextField( 'Lat' ) );
$fields->push( new TextField( 'Long' ) );
return $fields;
}

   public function toString() {
return $this->Lat.','.$this->Long;
}
}

Building Database

Creating database tables
# Newsletter
# Newsletter_SentRecipient
# Newsletter_Recipient
# NewsletterType
# PageComment
# CalendarDateTime
# RecurringDayOfMonth
# RecurringDayOfWeek
# RecurringException
# GMap
# GMapPoint
# Point

FATAL ERROR: Bad class to singleton() - Point
At line 85 in /var/www/test_loc/htdocs/sapphire/core/Core.php

user_error(Bad class to singleton() - Point,256)
line 85 of Core.php

singleton(Point)
line 175 of DatabaseAdmin.php

DatabaseAdmin->doBuild()
line 90 of DatabaseAdmin.php

DatabaseAdmin->build(Array)
line 261 of Controller.php

Controller->run(Array)
line 104 of Director.php

Director::direct(db/build)
line 158 of main.php
Context
Debug (Debug::showError() in line 180 of Debug.php)

* className =

Point

* _SINGLETONS =
o Member =
Database record: Member
+ ID :

0

o Newsletter =
Database record: Newsletter
+ ID :

0

o Newsletter_SentRecipient =
Database record: Newsletter_SentRecipient
+ ID :

0

o Newsletter_Recipient =
Database record: Newsletter_Recipient
+ ID :

0

o NewsletterType =
Database record: NewsletterType
+ ID :

0

o PageComment =
Database record: PageComment
+ ID :

0

o CalendarDateTime =
Database record: CalendarDateTime
+ ID :

0

o RecurringDayOfMonth =
Database record: RecurringDayOfMonth
+ ID :

0

o RecurringDayOfWeek =
Database record: RecurringDayOfWeek
+ ID :

0

o RecurringException =
Database record: RecurringException
+ ID :

0

o GMap =
Database record: GMap
+ ID :

0

o GMapPoint =
Database record: GMapPoint
+ ID :

0