Hi erveryone

I have code :

 def _calc_seller(self, cr, uid, ids, fields, arg, context=None):
    codeordersales=self.read(cr, uid, ids, ['saleordercode'])[0]['saleordercode']

    result = {}

    for product in self.browse(cr, uid, ids, context=context):
        _id='+product.id+'
        oj=self.pool.get('cvs.quotations.cutproduct')
        oj_search=oj.search(cr,uid,[('saleordercode','=',str(codeordersales)),('id_quotations','=',product.id)])
        oj_data=oj.read(cr,uid,oj_search,[],context)
        src = []
        for item in oj_data:
            src.append(item['id'])
        result[product.id] = src

    return result

when i run the error" operator does not exist: text = integer"

Can you help me ?