I need to relate a field which is on a One2many field of another model, so far I've tried like this:

    field_many = fields.Many2one('other.model', string="Many field")

    field_related = fields.Float(string="My field", related="field_many.one2manyfield.field"

But it throws me:

• Traceback (most recent call last):

•   File "werkzeug\serving.py", line 177, in run_wsgi

•   File "werkzeug\serving.py", line 165, in execute

•   File "C:\Program Files (x86)\Odoo 8.0-20170914\server\openerp\service\server.py", line 294, in app

•     return self.app(e, s)

•   File "C:\Program Files (x86)\Odoo 8.0-20170914\server\openerp\service\wsgi_server.py", line 216, in application

•     return application_unproxied(environ, start_response)

•   File "C:\Program Files (x86)\Odoo 8.0-20170914\server\openerp\service\wsgi_server.py", line 202, in application_unproxied

•     result = handler(environ, start_response)

•   File "C:\Program Files (x86)\Odoo 8.0-20170914\server\openerp\http.py", line 1299, in __call__

•     return self.dispatch(environ, start_response)

•   File "C:\Program Files (x86)\Odoo 8.0-20170914\server\openerp\http.py", line 1273, in __call__

•     return self.app(environ, start_wrapped)

•   File "werkzeug\wsgi.py", line 579, in __call__

•   File "C:\Program Files (x86)\Odoo 8.0-20170914\server\openerp\http.py", line 1444, in dispatch

•     ir_http = request.registry['ir.http']

•   File "C:\Program Files (x86)\Odoo 8.0-20170914\server\openerp\http.py", line 355, in registry

•     return openerp.modules.registry.RegistryManager.get(self.db) if self.db else None

•   File "C:\Program Files (x86)\Odoo 8.0-20170914\server\openerp\modules\registry.py", line 339, in get

•     update_module)

•   File "C:\Program Files (x86)\Odoo 8.0-20170914\server\openerp\modules\registry.py", line 370, in new

•     openerp.modules.load_modules(registry._db, force_demo, status, update_module)

•   File "C:\Program Files (x86)\Odoo 8.0-20170914\server\openerp\modules\loading.py", line 357, in load_modules

•     registry.setup_models(cr)

•   File "C:\Program Files (x86)\Odoo 8.0-20170914\server\openerp\modules\registry.py", line 194, in setup_models

•     model._setup_fields(cr, SUPERUSER_ID)

•   File "C:\Program Files (x86)\Odoo 8.0-20170914\server\openerp\api.py", line 268, in wrapper

•     return old_api(self, *args, **kwargs)

•   File "C:\Program Files (x86)\Odoo 8.0-20170914\server\openerp\api.py", line 372, in old_api

•     result = method(recs, *args, **kwargs)

•   File "C:\Program Files (x86)\Odoo 8.0-20170914\server\openerp\models.py", line 3010, in _setup_fields

•     field.setup(self.env)

•   File "C:\Program Files (x86)\Odoo 8.0-20170914\server\openerp\fields.py", line 468, in setup

•     self._setup_related(env)

•   File "C:\Program Files (x86)\Odoo 8.0-20170914\server\openerp\fields.py", line 514, in _setup_related

•     field = recs._fields[name]

• KeyError: 'one2manyfield'

• 
  

Any ideas on how to achieve this?