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?
