如何从我的 YAML 文件中访问 ‘map[string]interface {}’ 数据？

huangapple
go评论109阅读模式
英文:

How to access 'map[string]interface {}' data from my yaml file

问题

我有一个yaml文件，我正在尝试读取并循环遍历以提取其中的一些数据。

我的yaml示例：

  1. ---
  2. THE/NAME/DOESNT/MATTER:
  3.   TEST_NAME: THIS/IS/WHAT/IS/DISPLAYS/ON/THE/HTML
  4.   RUN_PATH: example/testfiles/release
  5.   SOMETHING_ELSE: [1,2,3]
  6. ANOTHER/PATH/LIKE/STRING:
  7.   TEST_NAME: USED/FOR/THE/HTML
  8.   RUN_PATH: example/testfiles/foo

我的代码：

  1. package main
  2. import (
  3. 	"fmt"
  4. 	"os"
  5. 	"io/ioutil"
  7. 	"gopkg.in/yaml.v3"
  8. )
  10. func main() {
  11. 	reportYAML := os.Args[1]
  13. 	yfile, err := ioutil.ReadFile(reportYAML)
  14. 	if err != nil {
  15. 		fmt.Printf("ERROR: Unable to open yaml file : %s\n", err)
  16. 	}
  17. 	data := make(map[interface{}]interface{})
  18.     error := yaml.Unmarshal([]byte(yfile), &data)
  19.     if error != nil {
  20.         fmt.Printf("ERROR: Unable to read yaml file : %s\n", err)
  21.     }
  22.     for _, value := range data {
  23.         fmt.Printf("%T\n", value)
  24.     }
  25. }

yaml文件将以类似的模式重复出现，我正在尝试提取TEST_NAME和RUN_PATH。使用%T打印出来的结果是map[string]interface {}，使用%s打印出来的结果是map[RUN_PATH:example/testfiles/release SOMETHING_ELSE:[%!s(int=1) %!s(int=2) %!s(int=3)] TEST_NAME:THIS/IS/WHAT/IS/DISPLAYS/ON/THE/HTML]。

我尝试过value["TEST_NAME"]、value.(string)["TEST_NAME"]、value["TEST_NAME"].(string)和其他几种变体，但都会出现错误。

我知道这是一个简单的问题，但我对GO的经验很少，无法从以前的类似stackoverflow帖子中解决它。

附加上下文：每个yaml顶级键将包含多个键值对，但我只对TEST_NAME和RUN_PATH感兴趣。

英文:

I have a yaml file i am trying to read in and loop over to extract some of the data.

example of my yaml

  1. ---
  2. THE/NAME/DOESNT/MATTER:
  3.   TEST_NAME: THIS/IS/WHAT/IS/DISPLAYS/ON/THE/HTML
  4.   RUN_PATH: example/testfiles/release
  5.   SOMETHING_ELSE: [1,2,3]
  6. ANOTHER/PATH/LIKE/STRING:
  7.   TEST_NAME: USED/FOR/THE/HTML
  8.   RUN_PATH: example/testfiles/foo

my code

  1. package main
  2. import (
  3. 	"fmt"
  4. 	"os"
  5. 	"io/ioutil"
  7. 	"gopkg.in/yaml.v3"
  8. )
  10. func main() {
  11. 	reportYAML := os.Args[1]
  12. 	// userDictionary := os.Args[2]
  14. 	yfile, err := ioutil.ReadFile(reportYAML)
  15. 	if err != nil {
  16. 		fmt.Printf("ERROR: Unable to open yaml file : %s\n", err)
  17. 	}
  18. 	data := make(map[interface{}]interface{})
  19.     error := yaml.Unmarshal([]byte(yfile), &data)
  20.     if error != nil {
  21.         fmt.Printf("ERROR: Unable to read yaml file : %s\n", err)
  22.     }
  23.     for _, value := range data {
  24.         fmt.Printf("%T\n", value)
  25.     }
  26.    	
  27. }

the yaml will repeat with a similar pattern and i am trying to extract both TEST_NAME and RUN_PATH. Printf with %T gives me map[string]interface {} and %s map[RUN_PATH:example/testfiles/release SOMETHING_ELSE:[%!s(int=1) %!s(int=2) %!s(int=3)] TEST_NAME:THIS/IS/WHAT/IS/DISPLAYS/ON/THE/HTML]

I've been trying value["TESTNAME"], value.(string)["TESTNAME"], value["TESTNAME"].(string) and a few other variations but they all give me errors.

I know this is a simple problem but i have very little experience with GO and can't work it out from previous, similar stackoverflow posts

additional context: each yaml top-level-key will contain multiple key:value pairs but i am only interested in the TEST_NAME and RUN_PATH

答案1

得分: 1

如果你只关心几个特定的键，只需创建一个数据结构来公开这些值：

  1. package main
  3. import (
  4. 	"fmt"
  5. 	"io/ioutil"
  6. 	"os"
  8. 	"gopkg.in/yaml.v3"
  9. )
  11. type (
  12. 	Entry struct {
  13. 		TestName string `yaml:"TEST_NAME"`
  14. 		RunPath  string `yaml:"RUN_PATH"`
  15. 	}
  16. )
  18. func main() {
  19. 	reportYAML := os.Args[1]
  20. 	// userDictionary := os.Args[2]
  22. 	yfile, err := ioutil.ReadFile(reportYAML)
  23. 	if err != nil {
  24. 		fmt.Printf("ERROR: 无法打开 yaml 文件：%s\n", err)
  25. 	}
  26. 	data := make(map[string]Entry)
  27. 	error := yaml.Unmarshal([]byte(yfile), &data)
  28. 	if error != nil {
  29. 		fmt.Printf("ERROR: 无法读取 yaml 文件：%s\n", err)
  30. 	}
  31. 	for _, value := range data {
  32. 		fmt.Printf("test_name: %s\n", value.TestName)
  33. 		fmt.Printf("run_path: %s\n", value.RunPath)
  34. 	}
  35. }

运行上述代码对你的示例数据进行处理会产生以下结果：

  1. test_name: THIS/IS/WHAT/IS/DISPLAYS/ON/THE/HTML
  2. run_path: example/testfiles/release
  3. test_name: USED/FOR/THE/HTML
  4. run_path: example/testfiles/foo
英文:

If you only care about a few specific keys, just create a data structure to expose those values:

  1. package main
  3. import (
  4. 	"fmt"
  5. 	"io/ioutil"
  6. 	"os"
  8. 	"gopkg.in/yaml.v3"
  9. )
  11. type (
  12. 	Entry struct {
  13. 		TestName string `yaml:"TEST_NAME"`
  14. 		RunPath  string `yaml:"RUN_PATH"`
  15. 	}
  16. )
  18. func main() {
  19. 	reportYAML := os.Args[1]
  20. 	// userDictionary := os.Args[2]
  22. 	yfile, err := ioutil.ReadFile(reportYAML)
  23. 	if err != nil {
  24. 		fmt.Printf("ERROR: Unable to open yaml file : %s\n", err)
  25. 	}
  26. 	data := make(map[string]Entry)
  27. 	error := yaml.Unmarshal([]byte(yfile), &data)
  28. 	if error != nil {
  29. 		fmt.Printf("ERROR: Unable to read yaml file : %s\n", err)
  30. 	}
  31. 	for _, value := range data {
  32. 		fmt.Printf("test_name: %s\n", value.TestName)
  33. 		fmt.Printf("run_path: %s\n", value.RunPath)
  34. 	}
  35. }

Running the above code against your example data produces:

  1. test_name: THIS/IS/WHAT/IS/DISPLAYS/ON/THE/HTML
  2. run_path: example/testfiles/release
  3. test_name: USED/FOR/THE/HTML
  4. run_path: example/testfiles/foo

huangapple
  • 本文由 发表于 2022年11月10日 20:57:06
  • 转载请务必保留本文链接：https://go.coder-hub.com/74389367.html
  • go
  • yaml
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