Domains don't work with related O2M.

[wowas]

If apply the domain to related field with type O2M, then it don't work!
For example:

'picking_id': fields.many2one('stock.picking', 'Picking List', readonly=True, ondelete="restrict",
            help="This is the Internal Picking List that brings the finished product to the production plan"),
'available_product': fields.related('picking_id', 'move_lines', type='one2many', relation="stock.move", string='Available Products',
            domain=[('state','in', ('assigned'))], readonly=True),

Field 'available_product' will show all product moves, but expected only with 'state=assigned'.