mgo bson can't serialize into struct

[lac]

Hi, it 's my struct:

type findingSchool struct {

    Id                bson.ObjectId     `_id`

    StudentNum        map[string]string `bson:"年级人数构成"`

    E_des             string            `bson:"e_des"`

    Baseinfo          findschBaseinfo   `bson:"baseinfo"`

    QualityofTeaching qualityofteaching `bson:"教学质量"`

    Apply             findingApply      `bson:"apply"`

    Tuition           findTuition       `bson:"tuition|2013"`

    //    Targetranking     targetranking     `targetranking`

    Dorm            findschoolDorm    `bson:"学校住宿"`

    University      map[string]string `bson:"全国性综合大学"`

}

Because because the real key in my mongo collection is not stable, like tuition may be 'tuition|2013' or 'tuition|2012', so i can't get the result.

how can i do?

[Klaus Post]

Hi!

Just looking quickly at it, the "Id" struct tag is wrong. It should be `bson:"_id"`.

If you have multiple representations of the same value, you could either have multiple struct members with a pointer, or extract to a bson.M and use code to extract that value by iterating the map.

/Klaus

[Gustavo Niemeyer]

Although discouraged, it actually still works unadorned like that, for historical reasons.

I think the problem being reported is the fact we cannot change the tag at runtime.

This may only be addressed by using a map instead of a fixed field.

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gustavo @ http://niemeyer.net