忽略的YAML标签

huangapple
go评论189阅读模式
英文:

Ignored YAML tag

问题

我有一个config.yml文件：

  1. vcenter:
  2.   connection: https 
  3.   hostname: vcenter.mydomain.lan
  4.   username: readonlyauto@vsphere.local
  5.   password: mypasspord
  6.   port: 443
  8. EsxiExcludeDatastores:
  9.   - datastore1
  10.   - datastore2
  12. EsxiExcludeDatastores2:
  13.   datastores:
  14.     - datastore1
  15.     - datastore2

我试图使用"gopkg.in/yaml.v2"解析它。

我创建了一个结构体：

  1. type FileConfig struct {
  2. 	Vcenter struct {
  3. 		ConnectionType string `yaml:"connection"`
  4. 		Hostname string `yaml:"hostname"`
  5. 		Username string `yaml:"username"`
  6. 		Password string `yaml:"password"`
  7. 		Port int `yaml:"port"`
  8. 	} `yaml:"vcenter"`
  9. 	EsxiExcludeDatastores struct {
  10. 		Datastores []string `yaml:"EsxiExcludeDatastores"`
  11. 	}
  12. 	EsxiExcludeDatastores2 struct {
  13. 		Datastores []string `yaml:"datastores"`
  14. 	} `yaml:"EsxiExcludeDatastores2"`
  15. }
  17. var AppConfig FileConfig

解析后，我打印结果：

  1. fmt.Println("Num of EsxiExcludeDatastores.Datastores = ", len(AppConfig.EsxiExcludeDatastores.Datastores))
  2. fmt.Println("Num of EsxiExcludeDatastores2.Datastores = ", len(AppConfig.EsxiExcludeDatastores2.Datastores))
  5. Num of EsxiExcludeDatastores.Datastores =  0
  6. Num of EsxiExcludeDatastores2.Datastores =  2

你能帮我看看，在EsxiExcludeDatastores结构体中我犯了什么错误吗？如你所见，EsxiExcludeDatastores是空的，但EsxiExcludeDatastores2一切正常。

我尝试了不同的方法，但没有结果...

英文:

I have config.yml file:

  1. vcenter:
  2.   connection: https 
  3.   hostname: vcenter.mydomain.lan
  4.   username: readonlyauto@vsphere.local
  5.   password: mypasspord
  6.   port: 443
  8. EsxiExcludeDatastores:
  9.   - datastore1
  10.   - datastore2
  12. EsxiExcludeDatastores2:
  13.   datastores:
  14.     - datastore1
  15.     - datastore2

I'm trying to parse it with "gopkg.in/yaml.v2"

I created struct:

  1. type FileConfig struct {
  2. 	Vcenter struct {
  3. 		ConnectionType string `yaml:"connection"`
  4. 		Hostname string `yaml:"hostname"`
  5. 		Username string `yaml:"username"`
  6. 		Password string `yaml:"password"`
  7. 		Port int `yaml:"port"`
  8. 	} `yaml:"vcenter"`
  9. 	EsxiExcludeDatastores struct {
  10. 		Datastores []string `yaml:"EsxiExcludeDatastores"`
  11. 	}
  12. 	EsxiExcludeDatastores2 struct {
  13. 		Datastores []string `yaml:"datastores"`
  14. 	} `yaml:"EsxiExcludeDatastores2"`
  15. }
  17. var AppConfig FileConfig

After parsing, I print results:

  1. 	fmt.Println("Num of EsxiExcludeDatastores.Datastores = ", len(AppConfig.EsxiExcludeDatastores.Datastores))
  2. 	fmt.Println("Num of EsxiExcludeDatastores2.Datastores = ", len(AppConfig.EsxiExcludeDatastores2.Datastores))
  5. Num of EsxiExcludeDatastores.Datastores =  0
  6. Num of EsxiExcludeDatastores2.Datastores =  2

Can you help me, where I did mistake in EsxiExcludeDatastores struct? As you see, everything is fine with EsxiExcludeDatastores2, but EsxiExcludeDatastores is empty.

I tried to do this in different ways, but with no result ...

答案1

得分: 3

你已经接近成功了。

要将 yaml 结构标签“提升”到“父级”字段，可以添加以下内容：

  1. EsxiExcludeDatastores struct {
  2. 	Datastores []string `yaml:"EsxiExcludeDatastores"`
  3. } `yaml:",inline"`   // <- 这里

https://play.golang.org/p/S7QxGaspTyN

根据 yaml.v2 文档，使用 inline 标签的结构标签会执行以下操作：

内联字段，该字段必须是一个结构体或映射，导致其所有字段或键被处理为外部结构体的一部分。对于映射，键不能与其他结构字段的 yaml 键冲突。

英文:

You're almost there.

To "promote" yaml struct tag(s) to the "parent" field, add:

  1. EsxiExcludeDatastores struct {
  2. 	Datastores []string `yaml:&quot;EsxiExcludeDatastores&quot;`
  3. } `yaml:&quot;,inline&quot;`   // &lt;- this

https://play.golang.org/p/S7QxGaspTyN

From the yaml.v2 docs, a struct tag that uses the inline flag does the following:

> Inline the field, which must be a struct or a map, causing all of its
> fields or keys to be processed as if they were part of the outer
> struct. For maps, keys must not conflict with the yaml keys of other
> struct fields.

huangapple
  • 本文由 发表于 2021年11月14日 03:34:57
  • 转载请务必保留本文链接：https://go.coder-hub.com/69957605.html
  • go
  • parsing
  • yaml
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