Gorm Why Open support multi Option but only apply the last one after sort?

Your Question

I was wondering why Open(dialector Dialector, opts ...Option) support multi Option and sort it but only the last one is applied finally? Or are there some misunderstanding?

func Open(dialector Dialector, opts ...Option) (db *DB, err error) {
    config := &Config{}

    sort.Slice(opts, func(i, j int) bool {
        _, isConfig := opts[i].(*Config)
        _, isConfig2 := opts[j].(*Config)
        return isConfig && !isConfig2
    })

    for _, opt := range opts {
        if opt != nil {
            if applyErr := opt.Apply(config); applyErr != nil {
                return nil, applyErr
            }
            defer func(opt Option) {
                if errr := opt.AfterInitialize(db); errr != nil {
                    err = errr
                }
            }(opt)
        }
    }

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Expected answer

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