发出解析Yaml文件的问题

Question

I have the following struct which filled after parsing yaml file The issue is that the quote is missing

File in.yaml

e.g.

_schema: "3.0.0"
bar:
- one

File out.yaml

_schema: 3.0.0
bar:
- one

As you can see I got 3.0.0 instead the “3.0.0” , Any idea how to overcome this

This is a small program which I've created to demonstrate the issue

package main

import (
    "gopkg.in/yaml.v2"
    "io/ioutil"
)

type Config struct {
    Schema string `yaml:"_schema"`
    Bar []string
}

func main() {

    cfg := Config{}
    source, err := ioutil.ReadFile("in.yaml")
    if err != nil {
        panic(err)
    }
    err = yaml.Unmarshal([]byte(source), &cfg)
    if err != nil {
        panic(err)
    }
    y, _ := yaml.Marshal(&cfg)
    err = ioutil.WriteFile("out.yaml", y, 0644)}

}

Answer 1

YAML standard doesn't require quoting of all values, only when you want to use escape sequences or you are using certain characters.

This library you are using adds "..." around the string only when it's necessary. For example if you used a colon in string (try: "3:0:0") it'll stay in double quotes.