在Viper中访问嵌套的YAML结构的问题

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英文:

Problem accessing nested YAML structure in Viper

问题

最近我尝试使用Viper和我的Cobra应用程序一起解析配置文件,但是发现无法解析内部嵌套块。ClustersOuter的映射始终为空,我确定mapstructure的标签是正确的。我更喜欢使用Viper的Unmarshal功能而不是手动获取数据类型。

输出结果:

map[zones:[{ClustersOuter:map[] Id:1} {ClustersOuter:map[] Id:2}]]

不知何故,我似乎只能获取zone映射及其ID,而无法获取clusters映射的任何内容。

我的输入:
config.yml

zones:
  - id: 1
    clusters:
      - cluster_id: 1
        k3s_config_file: "k3s-cluster-1-config.yaml"
      - cluster_id: 2
        k3s_config_file: "k3s-cluster-2-config.yaml"
      - cluster_id: 3
        k3s_config_file: "k3s-cluster-3-config.yaml" 
  - id: 2
    clusters:
      - cluster_id: 1
        k3s_config_file: "k3s-cluster-1-config.yaml"
      - cluster_id: 2
        k3s_config_file: "k3s-cluster-2-config.yaml"
      - cluster_id: 3
        k3s_config_file: "k3s-cluster-3-config.yaml"   

configuration.go

package config

type Zones struct {
	ClustersOuter map[string][]ClustersOuter `mapstructure:"zones"`
	Id            int                        `mapstructure:"id"`
}
type ClustersInner struct {
	ClusterId     int    `mapstructure:"cluster_id"`
	K3sConfigFile string `mapstructure:"k3s_config_file"`
}

type ClustersOuter struct {
	ClustersInner map[string][]ClustersInner `mapstructure:"clusters"`
}

type ConfigSuper map[string][]Zones

main.go

	viper.SetConfigName("config")
	viper.AddConfigPath(".")
	viper.SetConfigType("yaml")

	if err := viper.ReadInConfig(); err != nil {
		log.Fatalf("Error reading config file, %s", err)
		return false
	}

	var configuration config.ConfigSuper
	err := viper.Unmarshal(&configuration)
	if err != nil {
		log.Fatalf("unable to decode into struct, %v", err)
	}

	fmt.Printf("%+v\n", configuration)
英文:

Recently trying out Viper with my Cobra app to parse my config, but turned out that I couldn't parse the inner nested block. The map for ClustersOuter is always empty, and I am sure the mapstructure is tagged correctly. I would prefer to use Viper Unmarshall feature rather than Getting the data type manually.

Output

map[zones:[{ClustersOuter:map[] Id:1} {ClustersOuter:map[] Id:2}]]

Somehow it seems like I can only retrieve the zone map and its ID, but not any map for the clusters map.

My inputs:
config.yml

zones:
  - id: 1
    clusters:
      - cluster_id: 1
        k3s_config_file: "k3s-cluster-1-config.yaml"
      - cluster_id: 2
        k3s_config_file: "k3s-cluster-2-config.yaml"
      - cluster_id: 3
        k3s_config_file: "k3s-cluster-3-config.yaml" 
  - id: 2
    clusters:
      - cluster_id: 1
        k3s_config_file: "k3s-cluster-1-config.yaml"
      - cluster_id: 2
        k3s_config_file: "k3s-cluster-2-config.yaml"
      - cluster_id: 3
        k3s_config_file: "k3s-cluster-3-config.yaml"   

configuration.go

package config

type Zones struct {
	ClustersOuter map[string][]ClustersOuter `mapstructure:"zones"`
	Id            int                        `mapstructure:"id"`
}
type ClustersInner struct {
	ClusterId     int    `mapstructure:"cluster_id"`
	K3sConfigFile string `mapstructure:"k3s_config_file"`
}

type ClustersOuter struct {
	ClustersInner map[string][]ClustersInner `mapstructure:"clusters"`
}

type ConfigSuper map[string][]Zones

main.go

	viper.SetConfigName("config")
	viper.AddConfigPath(".")
	viper.SetConfigType("yaml")

	if err := viper.ReadInConfig(); err != nil {
		log.Fatalf("Error reading config file, %s", err)
		return false
	}

	var configuration config.ConfigSuper
	err := viper.Unmarshal(&configuration)
	if err != nil {
		log.Fatalf("unable to decode into struct, %v", err)
	}

	fmt.Printf("%+v\n", configuration)

答案1

得分: 3

你的结构类型与YAML类型不匹配,看起来你将映射和切片组合在一起,而实际上你只处理切片。在YAML中,映射的格式如下:

myMap:
    key1: value1

而数组的格式如下:

myArray:
    - foo: bar

不幸的是,你的配置对象混乱到我无法理解意图,所以我为你重新编写了它。这些类型可以被Viper解码而没有任何问题。

type Config struct {
    Zones []Zone `mapstructure:"zones"`
}

type Zone struct {
    ID       int        `mapstructure:"id"`
    Clusters []Cluster `mapstructure:"clusters"`
}

type Cluster struct {
    ClusterID     int    `mapstructure:"cluster_id"`
    K3sConfigFile string `mapstructure:"k3s_config_file"`
}

Config 结构体是根对象,请确保解组到该结构体中。

config := Config{}
err = viper.Unmarshal(&config)
英文:

Your struct types do not reflect the YAML type, it looks like you've combined maps and slices together when you're only dealing with slices. In YAML, maps look like this:

myMap:
    key1: value1

and arrays look like this:

myArray:
    - foo: bar

Unfortunately, your config object is messed up enough that I can't understand the intent so I re-wrote it for you. These types can be decoded by Viper without any issues.

type Config struct {
	Zones []Zone `mapstructure:"zones"`
}

type Zone struct {
	ID       int        `mapstructure:"id"`
	Clusters []Cluster `mapstructure:"clusters"`
}

type Cluster struct {
	ClusterID     int    `mapstructure:"cluster_id"`
	K3sConfigFile string `mapstructure:"k3s_config_file"`
}

The Config struct is the root object, make sure to unmarshal into that.

config := Config{}
err = viper.Unmarshal(&config)

huangapple
  • 本文由 发表于 2021年6月5日 04:55:26
  • 转载请务必保留本文链接:https://go.coder-hub.com/67843868.html
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