I am stuck in an error, which i am unable to figure out. I have field like this:

    'person':fields.char('Person')

It was working fine. I replaced it with:

    'person':fields.many2one('res.partner','Person')

but i am getting exception like this:

    OpenERP Server Error
    
    Client Traceback (most recent call last):
      File "/opt/openerp/server/openerp/addons/web/http.py", line 204, in dispatch
        response["result"] = method(self, **self.params)
      File "/opt/openerp/server/openerp/addons/web/controllers/main.py", line 1051, in search_read
        return self.do_search_read(req, model, fields, offset, limit, domain, sort)
      File "/opt/openerp/server/openerp/addons/web/controllers/main.py", line 1086, in do_search_read
        records = Model.read(ids, fields or False, req.context)
      File "/opt/openerp/server/openerp/addons/web/session.py", line 42, in proxy
        result = self.proxy.execute_kw(self.session._db, self.session._uid, self.session._password, self.model, method, args, kw)
      File "/opt/openerp/server/openerp/addons/web/session.py", line 30, in proxy_method
        result = self.session.send(self.service_name, method, *args)
      File "/opt/openerp/server/openerp/addons/web/session.py", line 103, in send
        raise xmlrpclib.Fault(openerp.tools.ustr(e), formatted_info)
    
    
    Server Traceback (most recent call last):
      File "/opt/openerp/server/openerp/addons/web/session.py", line 89, in send
        return openerp.netsvc.dispatch_rpc(service_name, method, args)
      File "/opt/openerp/server/openerp/netsvc.py", line 296, in dispatch_rpc
        result = ExportService.getService(service_name).dispatch(method, params)
      File "/opt/openerp/server/openerp/service/web_services.py", line 626, in dispatch
        res = fn(db, uid, *params)
      File "/opt/openerp/server/openerp/osv/osv.py", line 190, in execute_kw
        return self.execute(db, uid, obj, method, *args, **kw or {})
      File "/opt/openerp/server/openerp/osv/osv.py", line 132, in wrapper
        return f(self, dbname, *args, **kwargs)
      File "/opt/openerp/server/openerp/osv/osv.py", line 199, in execute
        res = self.execute_cr(cr, uid, obj, method, *args, **kw)
      File "/opt/openerp/server/openerp/osv/osv.py", line 187, in execute_cr
        return getattr(object, method)(cr, uid, *args, **kw)
      File "/opt/openerp/server/openerp/osv/orm.py", line 3679, in read
        result = self._read_flat(cr, user, select, fields, context, load)
      File "/opt/openerp/server/openerp/osv/orm.py", line 3800, in _read_flat
        res2 = self._columns[f].get(cr, self, ids, f, user, context=context, values=res)
      File "/opt/openerp/server/openerp/osv/fields.py", line 468, in get
        context=context))
      File "/opt/openerp/server/openerp/osv/orm.py", line 2393, in name_get
        load='_classic_write', context=context)]
      File "/opt/openerp/server/openerp/addons/base/res/res_users.py", line 830, in read
        res = super(users_view, self).read(cr, uid, ids, fields, context=context, load=load)
      File "/opt/openerp/server/openerp/addons/base/res/res_users.py", line 292, in read
        result = super(res_users, self).read(cr, uid, ids, fields=fields, context=context, load=load)
      File "/opt/openerp/server/openerp/osv/orm.py", line 3679, in read
        result = self._read_flat(cr, user, select, fields, context, load)
      File "/opt/openerp/server/openerp/osv/orm.py", line 3731, in _read_flat
        cr.execute(query, [tuple(sub_ids)] + rule_params)
      File "/opt/openerp/server/openerp/sql_db.py", line 161, in wrapper
        return f(self, *args, **kwargs)
      File "/opt/openerp/server/openerp/sql_db.py", line 226, in execute
        res = self._obj.execute(query, params)
    ProgrammingError: operator does not exist: integer = boolean
    LINE 1: ...,res_users.id FROM "res_users" WHERE res_users.id IN (false)...
                                                                 ^
    HINT:  No operator matches the given name and argument type(s). You might need to add explicit type casts.

I have used same syntax with other modules and they are working fine. I tried to replace `res.partner` with `hr.employee` and `res.users` but issue remains same. Kindly guide me to right direction.

Thanks