go - 如何从 yaml 解码嵌入式结构

Question

我想使用嵌入式结构解码 yaml，主要用于 DRY:

package main

import (
    "fmt"
    "log"
    "gopkg.in/yaml.v2"
)

type Person struct {
    Name string
}

type Employee struct {
    Person
    Number string
}

func (c *Employee) Dump() {
    d, err := yaml.Marshal(c)
    if err != nil {
        log.Fatalf("error: %v", err)
    }
    fmt.Printf("--- dump:\n%s\n\n", string(d))
}

func main() {
    s := `
name: john
number: one
`

    c := &Employee{}
    err := yaml.Unmarshal([]byte(s), c)
    if err != nil {
        log.Fatalf("Unmarshal: %v", err)
    }

    c.Dump()
}

这导致:

--- dump:
person:
  name: ""
number: one

如何解码嵌入的 Person？

Answer 1

您应该添加内嵌标签，例如:

type Employee struct {
    Person `yaml:",inline"`
    Number string
}

这将输出:

--- dump:
name: john
number: one

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