Hi Odooers

pleas i need help 

to group my manifacturing orders for an order of several items ,i created a new  model  in  mrp module  and  i need to display manifacturing orders  of this order in a the  page of notebook  of  my  model.  i  was  thinking  to  add  a  function  to  the  button  of  confirmation to Change the order path . i tried a relational fields  but  he  don't  work.

code:

ligne_article_commande = fields.One2many('mrp.production','product_id',string='Ordre de travail')

page string ="ligne de Production"

           label for="ligne_article_commande"/
           field name="ligne_article_commande"  options="{'no_create': True}"/

       /page