What is the function of the DocData field Attri? How to store Attri?

[yale8848]

type DocData struct {
    ...
    Attri interface{}
    ...
}

1. What is the function of the Attri ?
2. I test to store the Attri , but it was fail. Flow is the code:

type parentInfo struct{
    Name string
    Id int64
}
type resIndexNode struct {
    Id int64
    Name string
    Attr []parentInfo
}
...
searcher.Init(types.EngineOpts{
        Using: 3,
        UseStore: true,
        StoreFolder:dataPath,
})
...

func addIndex(rin*resIndexNode)  {
    searcher.Index(uint64(rin.Id), types.DocData{Content: rin.Name,Attri:rin.Attr},true)
    searcher.Flush()
}

reload index:

func reloadIndex(dataPath string)  {

    searcher.Init(types.EngineOpts{
        Using: 3,
        UseStore: true,
        StoreFolder:dataPath,
    })
    searcher.FlushIndex()

    log.Println("recover index number: ", searcher.NumDocsIndexed())
}

searcher.NumDocsIndexed() is 0

[vcaesar]

I reproduced your question, I will update it.