如果您在不同Get
方法可仔細一看,你會看到,返回類型爲string
, []string
,map[string]interface{}
,map[string]string
和map[string][]string
。
但是,與「問題類型」關聯的值的類型是[]map[string]string
。因此,獲取這些數據的唯一方法是通過Get
方法並使用類型斷言。
現在,下面的代碼會生成issue_types
的合適類型,即[]map[string]string
。
issues_types := make([]map[string]string, 0)
var m map[string]string
issues_i := viper.Get("issue-types")
// issues_i is interface{}
issues_s := issues_i.([]interface{})
// issues_s is []interface{}
for _, issue := range issues_s {
// issue is an interface{}
issue_map := issue.(map[interface{}]interface{})
// issue_map is a map[interface{}]interface{}
m = make(map[string]string)
for k, v := range issue_map {
m[k.(string)] = v.(string)
}
issues_types = append(issues_types, m)
}
fmt.Println(reflect.TypeOf(issues_types))
# []map[string]string
fmt.Println(issues_types)
# [map[source-type:Incident remote-type:Task]
# map[source-type:Service Request remote-type:Task]
# map[source-type:Change remote-type:Story]
# map[source-type:Problem remote-type:Task]]
請注意,我沒有做任何安全檢查,以使代碼更小。然而,正確的斷言類型是:
var i interface{} = "42"
str, ok := i.(string)
if !ok {
// A problem occurred, do something
}