I am getting this error can anyone help?

Here is the Traceback :

    Traceback (most recent call last):
  File "C:/GreenOdoo-master-win32/source\openerp\http.py", line 462, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "C:/GreenOdoo-master-win32/source\openerp\http.py", line 481, in dispatch
    result = self._call_function(**self.params)
  File "C:/GreenOdoo-master-win32/source\openerp\http.py", line 297, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "C:/GreenOdoo-master-win32/source\openerp\service\model.py", line 113, in wrapper
    return f(dbname, *args, **kwargs)
  File "C:/GreenOdoo-master-win32/source\openerp\http.py", line 294, in checked_call
    return self.endpoint(*a, **kw)
  File "C:/GreenOdoo-master-win32/source\openerp\http.py", line 671, in __call__
    return self.method(*args, **kw)
  File "C:/GreenOdoo-master-win32/source\openerp\http.py", line 346, in response_wrap
    response = f(*args, **kw)
  File "C:\GreenOdoo-master-win32\source\addons\web\controllers\main.py", line 1046, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "C:\GreenOdoo-master-win32\source\addons\web\controllers\main.py", line 1038, in _call_kw
    return getattr(request.registry.get(model), method)(request.cr, request.uid, *args, **kwargs)
  File "C:/GreenOdoo-master-win32/source\openerp\osv\orm.py", line 4264, in create
    self.pool[model_name]._store_set_values(cr, user, ids, fields2, context)
  File "C:/GreenOdoo-master-win32/source\openerp\osv\orm.py", line 4430, in _store_set_values
    '"'+f+'"='+self._columns[f]._symbol_set[0] + ' where id = %s', (self._columns[f]._symbol_set[1](value), id))
  File "C:/GreenOdoo-master-win32/source\openerp\sql_db.py", line 155, in wrapper
    return f(self, *args, **kwargs)
  File "C:/GreenOdoo-master-win32/source\openerp\sql_db.py", line 230, in execute
    res = self._obj.execute(query, params)
DataError: invalid input syntax for integer: "{'random_seller_info_id': 6}"
LINE 1: ...oans_e3loan_services" set "random_seller_info_id"='{''random...
                                                                                                    ^

and my code:

class itaconloans_e3loan_services(osv.osv):
    """ Itacon loans application 'E3 Loan Application services' """
    _name = 'itaconloans.e3loan.services'
    _description = 'Loans services'

    def get_product_provider(self, cr, uid, ids, args, field_names, context=None):
        res = {}
        for record in self.browse(cr, uid, ids, context=context):
            cr.execute('''select name from product_supplierinfo where product_tmpl_id in (select id from product_template) order by RANDOM() limit 1''')
            val = cr.fetchone()
            if val:
                res[record.id] = {'random_seller_info_id': val[0]}
                res[record.id]['random_seller_info_id'] = val[0]

        return res

    _columns = {
        'ServicesID': fields.char('Services ID', size=15),
        'product_id': fields.many2one('product.product', 'name', 'Service Name'),

        'AppNum': fields.many2one('itaconloans.e3loan', 'Application Number', select=True),

        'provider': fields.many2one('res.partner', 'Provider Name', select=True),

        'DateReq': fields.date('Date Requested'),
        'DateComp': fields.date('Date Completed'),
        'DateToComp': fields.date('Date To Complete'),
        'comments': fields.text('Comments', translate=True),

        'random_seller_info_id': fields.function(get_product_provider, type='many2one', relation="product.supplierinfo", string="Random Supplier", store=True),
    }

itaconloans_e3loan_services()