php - Symfony2 mapping works for one entity but not the other -

i have 2 entitites mapped together.

skin.php :

/**  * @var cmselement  *  * @orm\manytoone(targetentity="cmselement")  * @orm\joincolumns({  *   @orm\joincolumn(name="homepage_id", referencedcolumnname="id")  * })  */ private $homepage; 

cmselement.php :

/**  * @var skin  *  * @orm\manytoone(targetentity="skin")  * @orm\joincolumns({  *   @orm\joincolumn(name="skin_id", referencedcolumnname="id")  * })  */ private $skinid; 

and thats it. skin table mapped correctly, id of cmselement. in cmselement dont needed skinid... stays null. codes identical, why doesnt work?

an example better understanding:

skin:

id: 1 homepage_id: 2 

cmselement:

id: 2 skin_id: null 

in order set manytoone relation, have specify in both ways this:

// skin.php /**  * @var cmselement  *  * @orm\onetomany(targetentity="cmselement", mappedby="skinid")  * @orm\joincolumns({  *   @orm\joincolumn(name="homepage_id", referencedcolumnname="id")  * })  */ private $homepage;  // cmselement.php : /**  * @var skin  *  * @orm\manytoone(targetentity="skin", inversedby="homepage")  * @orm\joincolumns({  *   @orm\joincolumn(name="skin_id", referencedcolumnname="id")  * })  */ private $skinid; 

but, please take care of points:

• use $skin instead of $skinid because referencing entity, not id property
• the relation manytoone refer side multiple entity linked side 1 entity, please define wich multiple side , single one. assumed cmselement multiple side used manytoone on cmselement , onetomany other. if wrong, please invert this.
• use plurial name attribute @ multiple side. instance if set 1 $skin many $homepages, sure tu use final "s", it's easier understand.

here can find informations in order relation in right way: sf2 doc