Primary key data type

[cmhobbs]

Can the primary key be established as anything other than int? I'd like to be able to store an md5 string as the primary key for one of my tables. I have a struct that amounts to something like this:

type MyThing struct {
        Md5         string `PK`
        Description string
}

I'm storing it thusly:

func storething() {
        db, err := sql.Open("postgres", "user=someuser password=somepass dbname=thingdb")
        if err != nil {
                panic(err)
        }

        var thing MyThing
        thing.Md5 = "5c19ed618b82f97de0fd349d00431fb2"
        thing.Description = "my hovercraft is full of eels"

        orm := beedb.New(db, "pg")
        beedb.OnDebug = true
        orm.Save(&thing)
}

Calling storething() results in the following error:

2012/08/02 22:41:53 panic: reflect: call of reflect.Value.Int on string Value
/home/hobbsc/go/src/pkg/github.com/astaxie/beedb/beedb.go:360 (0x42909b)
        com/astaxie/beedb.(*Model).Save: if reflect.ValueOf(id).Int() == 0 {

----  further stack trace goes here ----

When I set the primary key as type int (be it id or some other field), this works just fine.

[astaxie]

i found it is a bug, thanks, i will fix it next week

[astaxie]

i think this problem today, i find some problems
orm.Save(&thing)
i have to distinguish wherther it is insert or update
if you set a string pk,then if you use save function maybe always update.And if i support string then insert return LastInsertId will error. So now it's hard to support Primary key for other data type

[chinakr]

我也遇到了类似的错误。如果没有if err != nil { orm = initDb() }这部分代码，就有可能出现reflect: call of reflect.Value.Set on zero Value beedb这个错误。如果有这部分代码，就不会出错了，但是原因我还没想明白。谢大能给看一下吗？

// 把微博数据保存到数据库
func saveWeibos(apiWeibos ApiWeiboList) {
    orm := initDb()
    for _, apiWeibo := range(apiWeibos.Statuses) {
        weibo := Weibo{}
        err := orm.Where("wid=?", apiWeibo.Id).Find(&weibo)    // 更新或新建记录
        //Check(err)
        if err != nil {    // No record found
            orm = initDb()
        }
        weibo.Wid = apiWeibo.Id
        weibo.Text = apiWeibo.Text
        weibo.Created = getTime(apiWeibo.Created_At)
        err = orm.Save(&weibo)
        Check(err)
        Debug("Weibo %d(%v) saved.", weibo.Wid, weibo.Created)
    }
}