Question

我有以下代码：

package main

import (
    "log"

    "github.com/spf13/viper"
)

func main() {
    viper.SetEnvPrefix("myprefix")
    viper.SetDefault("languages", []string{"french", "spanish"})
    viper.BindEnv("name")
    viper.BindEnv("languages")

    type config struct {
        Name      string
        Languages []string
    }

    var C config

    err := viper.Unmarshal(&C)
    if err != nil {
        log.Fatalln("unable to decode into struct, %v", err)
    }

    log.Println(C)
    log.Println(len(C.Languages))
}

未设置$MYPREFIX_LANGUAGES时，C.Languages的长度为2（例如默认值）。当我将$MYPREFIX_LANGUAGES设置为＆＃34;英语西班牙语法语俄语＆＃34;我得到的长度为1.它只是将变量作为1个长字符串，而不是切片。如何获得切片（[]string{"english", "spanish", "french", "russian"}？

Answer 1

感谢@Charlino，答案是：

package main

import (
    "log"

    "github.com/spf13/viper"
)

func main() {
    viper.SetEnvPrefix("myprefix")
    viper.SetTypeByDefaultValue(true)
    viper.SetDefault("languages", []string{"french", "spanish"})
    viper.BindEnv("name")
    viper.BindEnv("languages")

    type config struct {
        Name      string
        Languages []string
    }

    var C config

    err := viper.Unmarshal(&C)
    if err != nil {
        log.Fatalln("unable to decode into struct, %v", err)
    }

    log.Println(C)
    log.Println(len(C.Languages))
}

如何使用viper将环境变量解组为切片？

1 个答案: