hi;

i want to do a many2many filtre domain baser other many2many field i dont know how to do it in this case:

class ec_document(osv.Model):

class ec_document(osv.Model):
    _name ='ec.document'
    _description='ec document'
    _columns = {

                'name':fields.char('Réfrence document',required=True),
                'datedoc':fields.datetime('Date du document', required=True),
                'titre':fields.char('Titre', size=200 , required=True),
                'desc':fields.text('Description'),
                'niveau':fields.many2many('ec.classe.niveau','niveau_doc_rel','niveau_id','docuement_id','Niveau', required=True),
                'allevel':fields.boolean('Pour tout le niveau'),
                'classe':fields.many2many('ec.classe','classe_doc_rel' ,'classe_id','docuement_id','Classes Concernés',domain="[('classe.niveau.id', 'in', niveau[0][2])]"),
                'doc':fields.binary('Document', required=True)

                }

class ec_classe(osv.Model):
    _name = 'ec.classe'
    _description= 'ec classe'
    _columns ={
                'name':fields.char('Libellé Classe', size=20 , required=True),
                'code':fields.integer('Code Classe', size=4, required=True),
                'type': fields.many2one('ec.classe.type','Type de Classe',required=True),
                'niveau': fields.many2one('ec.classe.niveau','Niveau de Classe',required=True),
                'serie': fields.many2one('ec.classe.serie','Serie de Classe',required=True),
                'classeDetail': fields.one2many('ec.classe.detail','classe_id','Detail de la classe',copy=True),

class ec_classe_niveau(osv.Model):
    _name = 'ec.classe.niveau'
    _description= 'ec classe niveau'
    _columns ={
                'name':fields.char('Niveau', size=20 , required=True),
                'serie':fields.many2one('ec.classe.serie','Serie', required=True),
                
                }