Question

我有以下程序需要解析yaml 具有以下结构

https://codebeautify.org/yaml-validator/cbabd352 这是有效的Yaml ，我使用字节来使其更简单也许在复制粘贴到问题的过程中缩进已更改，但是您可以在链接中看到yaml有效

Yaml具有api_version 和跑步者，对于每个跑步者（键是名称），我都有命令列表并且我需要为function1和function4打印这些命令，我在这里做错了什么？

package main

import (
    "fmt"
    "log"

    "gopkg.in/yaml.v2"
)

var runContent = []byte(`
api_ver: 1
runners:
 - name: function1
   type:
    - command: spawn child process
    - command: build
    - command: gulp
 - name: function2
   type:
    - command: run function 1
 - name: function3
   type:
    - command: ruby build
 - name: function4
   type:
    - command: go build
`)

type Result struct {
    Version string    `yaml:"api_ver"`
    Runners []Runners `yaml:"runners"`
}

type Runners struct {
    Name string    `yaml:"name"`
    Type []Command `yaml:"type"`
}

type Command struct {
    Command string `yaml:"command"`
}

func main() {

    var runners []Result
    err := yaml.Unmarshal(runContent, &runners)
    if err != nil {
        log.Fatalf("Error : %v", err)
    }
    fmt.Printf("%+v", runners[0])
}

我得到cannot unmarshal !!map into []main.Result

的错误

我无法更改Yaml，应该完全像这样

https://codebeautify.org/yaml-validator/cbabd352

这是代码 https://play.golang.org/p/zidjOA6-gc7

Answer 1

您提供的Yaml包含令牌错误。在https://codebeautify.org/yaml-validator/cbaabb32

处验证代码中使用的Yaml

之后，创建结构类型的变量结果不是数组。因为您使用的Yaml正在使用Runners数组和api_version创建结构。

此

var runners []Result

应该是

var runners Result

因为该结构不是切片。为yaml中使用的功能名称获取命令列表。您需要遍历runners数组以查找函数名称并获取该函数的命令值。下面是工作代码：

package main

import (
    "fmt"
    "log"

    "gopkg.in/yaml.v2"
)

var runContent = []byte(`
api_ver: 1
runners:
  - name: function1
    type:
    - command: spawn child process
    - command: build
    - command: gulp
  - name: function2
    type:
    - command: run function 1
    - name: function3
    type:
    - command: ruby build
  - name: function4
    type:
  - command: go build
`)

type Result struct {
    Version string    `yaml:"api_ver"`
    Runners []Runners `yaml:"runners"`
}

type Runners struct {
    Name string    `yaml:"name"`
    Type []Command `yaml:"type"`
}

type Command struct {
    Command string `yaml:"command"`
}

func main() {

    var runners Result
    // parse mta yaml
    err := yaml.Unmarshal(runContent, &runners)
    if err != nil {
        log.Fatalf("Error : %v", err)
    }
    commandList := getCommandList("function1", runners.Runners)
    fmt.Printf("%+v", commandList)
}

func getCommandList(name string, runners []Runners) []Command {
    var commandList []Command
    for _, value := range runners {
        if value.Name == name {
            commandList = value.Type
        }
    }
    return commandList
}

Playground example

解析地图Yaml错误

1 个答案: