------------------ 原始邮件 ------------------
发送时间: 2010年7月25日(星期天) 晚上7:17
收件人: "boost-users"<boost-users@lists.boost.org>;
主题: Re: [Boost-users]¤Multi_indexcomposite_key~~
isjk <isjk <at> foxmail.com> writes:
>
>
> thanks a lot!
>
> now, I have a new problem:
>
> Multi_index example 6: complex searches and forergn keys,
> struct car_manufacturer
> {
> std::string name;
> };
>
> struct car_model
> {
> std::string model;
> car_manufacturer* manufacturer;
> int price;
> };
>
> I want use "model, name" to query "price", and I maybe to modify "price".
>
> How to do it? thanks.
Sorry but your question is not clear to me: what do you mean
by querying "price" using "model, name"? If you know the model
of a car then you just can use find() in the car_table to locate
the element and access the price.
As for modifying, there's a tutorial section on updating elements
of a multi_index_container at
http://www.boost.org/libs/multi_index/doc/tutorial/basics.html#ord_updating
Joaquín M López Muoz
Telefónica, Investigación y Desarrollo
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