viper yaml 配置序列

Question

我正在尝试使用 viper (see viper docs) 读取 yaml 配置文件。但是我看不到一种方法来读取问题类型下的地图值序列。我尝试了各种 Get_ 方法但 none 似乎支持这一点。

remote:
  host: http://localhost/
  user: admin
  password:  changeit

mapping:
    source-project-key: IT
    remote-project-key: SCRUM

issue-types:
  - source-type: Incident
    remote-type: Task
  - source-type: Service Request
    remote-type: Task
  - source-type: Change
    remote-type: Story
  - source-type: Problem
    remote-type: Task

我希望能够遍历 map[strings] 的序列

Answer 1

如果您仔细查看可用的不同 Get 方法，您会发现 return 类型为 string、[]string、map[string]interface{} , map[string]string 和 map[string][]string.

但是，与 "issue-types" 关联的值的类型是 []map[string]string。因此，获取此数据的唯一方法是通过 Get 方法并使用类型断言。

现在，以下代码生成 issue_types 的适当类型，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]]

请注意，我没有做任何安全检查以使代码更小。但是，进行类型断言的正确方法是：

var i interface{} = "42"
str, ok := i.(string)
if !ok {
    // A problem occurred, do something
}

viper yaml 配置序列

viper yaml config sequence

yaml

go

viper-go