Go 如何从Viper访问阵列中的特定项目
我有一个类似于以下内容的yaml文件:Go 如何从Viper访问阵列中的特定项目,go,yaml,viper-go,Go,Yaml,Viper Go,我有一个类似于以下内容的yaml文件: ComplexItemList: - Name: First Complex item Date: Whenever StructItemList: - Name: blah Data1: 0 Data2: Silly - Name: Yaddah Data1: 12 Data2: Blah-blah-blah - Name: Second Complex item Date: Yesterday S
ComplexItemList:
- Name: First Complex item
Date: Whenever
StructItemList:
- Name: blah
Data1: 0
Data2: Silly
- Name: Yaddah
Data1: 12
Data2: Blah-blah-blah
- Name: Second Complex item
Date: Yesterday
StructItemList:
- Name: blah
Data1: 0
Data2: Silly
- Name: Yaddah
Data1: 12
Data2: Blah-blah-blah
以下是我的代码的简单版本:
package main
import (
"fmt"
"github.com/spf13/viper"
)
type StructItem struct {
Name string `yaml:"Name"`
Data1 int `yaml:"Data1"`
Data2 string `yaml:"Data2"`
}
type ComplexItem struct {
Name string `yaml:"Name"`
Date string `yaml:"Date"`
StructItemList []StructItem `yaml:"StructItemList,mapstructure"`
}
type TestConfig struct {
Version string `yaml:"Version"`
ComplexItemList []ComplexItem `yaml:"ComplexItemList,mapstructure"`
}
func main() {
viper.SetConfigName("simple1") // name of config file (without extension)
viper.SetConfigType("yaml") // REQUIRED if the config file does not have the extension in the name
viper.AddConfigPath(".")
err := viper.ReadInConfig() // Find and read the config file
if err != nil { // Handle errors reading the config file
panic(fmt.Errorf("Fatal error config file: %s \n", err))
}
test1 := viper.Get("ComplexItemList")
fmt.Printf("test1:\n%#v\n", test1)
// while I can easily unmarshal the information into a complex struct,
// updating the file contents via viper does not seem straight forward.
// Is there a way to access a specific item in an array using viper dot notation?
config := TestConfig{}
viper.Unmarshal(&config)
// is the best way to update Data1 for "First Complex item", just to update the
// unmarshalled struct then write the whole thing back out?
}
我想使用Viper读取配置文件,但我不确定在使用Get方法时如何区分“第一个复杂项”和“第二个复杂项”。我是否需要在复杂项目到达时保持其开始状态?我把事情复杂化了。最简单的方法是解组值,更新它们,然后从对象设置数组
config := TestConfig{}
viper.Unmarshal(&config)
config.ComplexItemList[0].StructItemList[0].Data2 = "updated item"
viper.Set("ComplexItemList", config.ComplexItemList)
或者,这不是通过viper更新yaml文件中阵列的正确方法吗?请展示您的尝试。我真想知道如何将内存中配置的更改序列化到磁盘上的文件,因为viper中没有封送处理方法。我认为正确的用法应该是使用“viper.Set”(“x.y.z”,value)”,但我不知道在数组中“x.y.z”应该是什么。