Trouble unmarshaling YAML structure
I have what I think is a very straightforward YAML structure I'm attempting to write to and read from a file.
appName:
version: 1.2.3.4
md5_checksum: 987654321
And I'm really struggling to understand nested structs and how they relate to yaml marshaling.
At this point I have the following:
type Application struct {
Name string `yaml:"application"`
Version string `yaml:"version"`
Checksum int `yaml:"md5_checksum"`
}
yamlData := Application{"MyProgram", "1.2.3.4", 34235234123}
y, err := yaml.Marshal(yamlData)
if err != nil {
log.Fatal("Yaml marshal failed")
}
err = ioutil.WriteFile("applications.yaml", y, 0644)
if err != nil {
log.Fatal("File write failed")
}
This gets me close, but the file reads as follows:
application: MyProgram
version: 1.2.3.4
md5_checksum: 34235234123
That looks nice, but this file will be populated by many applications. I've tried a few types of nested structs, but I get hung up on how to supply values to them when finally building them.
go struct yaml
edited Nov 26 '18 at 6:32
Flimzy
39.3k106698
asked Nov 26 '18 at 0:19
Tim BrammerTim Brammer
35
add a comment |
I have what I think is a very straightforward YAML structure I'm attempting to write to and read from a file.
appName:
version: 1.2.3.4
md5_checksum: 987654321
And I'm really struggling to understand nested structs and how they relate to yaml marshaling.
At this point I have the following:
type Application struct {
Name string `yaml:"application"`
Version string `yaml:"version"`
Checksum int `yaml:"md5_checksum"`
}
yamlData := Application{"MyProgram", "1.2.3.4", 34235234123}
y, err := yaml.Marshal(yamlData)
if err != nil {
log.Fatal("Yaml marshal failed")
}
err = ioutil.WriteFile("applications.yaml", y, 0644)
if err != nil {
log.Fatal("File write failed")
}
This gets me close, but the file reads as follows:
application: MyProgram
version: 1.2.3.4
md5_checksum: 34235234123
That looks nice, but this file will be populated by many applications. I've tried a few types of nested structs, but I get hung up on how to supply values to them when finally building them.
go struct yaml
edited Nov 26 '18 at 6:32
Flimzy
39.3k106698
asked Nov 26 '18 at 0:19
Tim BrammerTim Brammer
35
See example of nested yaml struct
– Mark
Nov 26 '18 at 1:38
add a comment |
I have what I think is a very straightforward YAML structure I'm attempting to write to and read from a file.
appName:
version: 1.2.3.4
md5_checksum: 987654321
And I'm really struggling to understand nested structs and how they relate to yaml marshaling.
At this point I have the following:
type Application struct {
Name string `yaml:"application"`
Version string `yaml:"version"`
Checksum int `yaml:"md5_checksum"`
}
yamlData := Application{"MyProgram", "1.2.3.4", 34235234123}
y, err := yaml.Marshal(yamlData)
if err != nil {
log.Fatal("Yaml marshal failed")
}
err = ioutil.WriteFile("applications.yaml", y, 0644)
if err != nil {
log.Fatal("File write failed")
}
This gets me close, but the file reads as follows:
application: MyProgram
version: 1.2.3.4
md5_checksum: 34235234123
That looks nice, but this file will be populated by many applications. I've tried a few types of nested structs, but I get hung up on how to supply values to them when finally building them.
go struct yaml
edited Nov 26 '18 at 6:32
Flimzy
39.3k106698
asked Nov 26 '18 at 0:19
Tim BrammerTim Brammer
35
I have what I think is a very straightforward YAML structure I'm attempting to write to and read from a file.
appName:
version: 1.2.3.4
md5_checksum: 987654321
And I'm really struggling to understand nested structs and how they relate to yaml marshaling.
At this point I have the following:
type Application struct {
Name string `yaml:"application"`
Version string `yaml:"version"`
Checksum int `yaml:"md5_checksum"`
}
yamlData := Application{"MyProgram", "1.2.3.4", 34235234123}
y, err := yaml.Marshal(yamlData)
if err != nil {
log.Fatal("Yaml marshal failed")
}
err = ioutil.WriteFile("applications.yaml", y, 0644)
if err != nil {
log.Fatal("File write failed")
}
This gets me close, but the file reads as follows:
application: MyProgram
version: 1.2.3.4
md5_checksum: 34235234123
That looks nice, but this file will be populated by many applications. I've tried a few types of nested structs, but I get hung up on how to supply values to them when finally building them.
go struct yaml
go struct yaml
edited Nov 26 '18 at 6:32
Flimzy
39.3k106698
asked Nov 26 '18 at 0:19
Tim BrammerTim Brammer
35
edited Nov 26 '18 at 6:32
Flimzy
39.3k106698
asked Nov 26 '18 at 0:19
Tim BrammerTim Brammer
35
edited Nov 26 '18 at 6:32
Flimzy
39.3k106698
edited Nov 26 '18 at 6:32
Flimzy
39.3k106698
edited Nov 26 '18 at 6:32
Flimzy
39.3k106698
39.3k106698
asked Nov 26 '18 at 0:19
Tim BrammerTim Brammer
35
asked Nov 26 '18 at 0:19
Tim BrammerTim Brammer
35
asked Nov 26 '18 at 0:19
Tim BrammerTim Brammer
35
35
See example of nested yaml struct
– Mark
Nov 26 '18 at 1:38
add a comment |
See example of nested yaml struct
– Mark
Nov 26 '18 at 1:38
See example of nested yaml struct
– Mark
Nov 26 '18 at 1:38
See example of nested yaml struct
– Mark
Nov 26 '18 at 1:38
add a comment |
2 Answers
2
active
oldest
votes
You can define Application struct as
type AppVersion struct {
Version string `yaml:"version"`
Checksum int `yaml:"md5_checksum"`
}
type Application struct {
Name AppVersion `yaml:"appName"`
}
Then call AppVersion as
yamlData := Application{Name: AppVersion{Version: "1.2.3.4", Checksum: 34235234123}}
answered Nov 26 '18 at 1:48
KibGzrKibGzr
1,486610
KibGzr, thank you for the succinct answer. My issue now is: how to I include the application name. What I end up with this implemtation is a static "appName"(literal) with nested version and checksum values. My main experience with YAML comes from Ansible, and I'm looking for something similar to the second code block shown here: docs.ansible.com/ansible/latest/reference_appendices/…
– Tim Brammer
Nov 26 '18 at 21:29
add a comment |
I've solved my own problem with help from KibGzr.
No structs necessary just for the marshaling steps.
yamlData := map[string]map[string]string{
appName: map[string]string{"version": appVersion, "md5_checksum": checksumString},
}
I've created a nested map rather than a struct. This allows me just initialize the map when I've collected all my values rather than trying to work around struct field names. My output is now:
appName:
md5_checksum: checksumString
version: appVersion
Thanks for all the help!
answered Nov 26 '18 at 22:26
Tim BrammerTim Brammer
35
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can define Application struct as
type AppVersion struct {
Version string `yaml:"version"`
Checksum int `yaml:"md5_checksum"`
}
type Application struct {
Name AppVersion `yaml:"appName"`
}
Then call AppVersion as
yamlData := Application{Name: AppVersion{Version: "1.2.3.4", Checksum: 34235234123}}
answered Nov 26 '18 at 1:48
KibGzrKibGzr
1,486610
KibGzr, thank you for the succinct answer. My issue now is: how to I include the application name. What I end up with this implemtation is a static "appName"(literal) with nested version and checksum values. My main experience with YAML comes from Ansible, and I'm looking for something similar to the second code block shown here: docs.ansible.com/ansible/latest/reference_appendices/…
– Tim Brammer
Nov 26 '18 at 21:29
add a comment |
You can define Application struct as
type AppVersion struct {
Version string `yaml:"version"`
Checksum int `yaml:"md5_checksum"`
}
type Application struct {
Name AppVersion `yaml:"appName"`
}
Then call AppVersion as
yamlData := Application{Name: AppVersion{Version: "1.2.3.4", Checksum: 34235234123}}
answered Nov 26 '18 at 1:48
KibGzrKibGzr
1,486610
KibGzr, thank you for the succinct answer. My issue now is: how to I include the application name. What I end up with this implemtation is a static "appName"(literal) with nested version and checksum values. My main experience with YAML comes from Ansible, and I'm looking for something similar to the second code block shown here: docs.ansible.com/ansible/latest/reference_appendices/…
– Tim Brammer
Nov 26 '18 at 21:29
add a comment |
You can define Application struct as
type AppVersion struct {
Version string `yaml:"version"`
Checksum int `yaml:"md5_checksum"`
}
type Application struct {
Name AppVersion `yaml:"appName"`
}
Then call AppVersion as
yamlData := Application{Name: AppVersion{Version: "1.2.3.4", Checksum: 34235234123}}
answered Nov 26 '18 at 1:48
KibGzrKibGzr
1,486610
You can define Application struct as
type AppVersion struct {
Version string `yaml:"version"`
Checksum int `yaml:"md5_checksum"`
}
type Application struct {
Name AppVersion `yaml:"appName"`
}
Then call AppVersion as
yamlData := Application{Name: AppVersion{Version: "1.2.3.4", Checksum: 34235234123}}
answered Nov 26 '18 at 1:48
KibGzrKibGzr
1,486610
answered Nov 26 '18 at 1:48
KibGzrKibGzr
1,486610
answered Nov 26 '18 at 1:48
KibGzrKibGzr
1,486610
answered Nov 26 '18 at 1:48
KibGzrKibGzr
1,486610
1,486610
KibGzr, thank you for the succinct answer. My issue now is: how to I include the application name. What I end up with this implemtation is a static "appName"(literal) with nested version and checksum values. My main experience with YAML comes from Ansible, and I'm looking for something similar to the second code block shown here: docs.ansible.com/ansible/latest/reference_appendices/…
– Tim Brammer
Nov 26 '18 at 21:29
add a comment |
KibGzr, thank you for the succinct answer. My issue now is: how to I include the application name. What I end up with this implemtation is a static "appName"(literal) with nested version and checksum values. My main experience with YAML comes from Ansible, and I'm looking for something similar to the second code block shown here: docs.ansible.com/ansible/latest/reference_appendices/…
– Tim Brammer
Nov 26 '18 at 21:29
KibGzr, thank you for the succinct answer. My issue now is: how to I include the application name. What I end up with this implemtation is a static "appName"(literal) with nested version and checksum values. My main experience with YAML comes from Ansible, and I'm looking for something similar to the second code block shown here: docs.ansible.com/ansible/latest/reference_appendices/…
– Tim Brammer
Nov 26 '18 at 21:29
KibGzr, thank you for the succinct answer. My issue now is: how to I include the application name. What I end up with this implemtation is a static "appName"(literal) with nested version and checksum values. My main experience with YAML comes from Ansible, and I'm looking for something similar to the second code block shown here: docs.ansible.com/ansible/latest/reference_appendices/…
– Tim Brammer
Nov 26 '18 at 21:29
add a comment |
I've solved my own problem with help from KibGzr.
No structs necessary just for the marshaling steps.
yamlData := map[string]map[string]string{
appName: map[string]string{"version": appVersion, "md5_checksum": checksumString},
}
I've created a nested map rather than a struct. This allows me just initialize the map when I've collected all my values rather than trying to work around struct field names. My output is now:
appName:
md5_checksum: checksumString
version: appVersion
Thanks for all the help!
answered Nov 26 '18 at 22:26
Tim BrammerTim Brammer
35
add a comment |
I've solved my own problem with help from KibGzr.
No structs necessary just for the marshaling steps.
yamlData := map[string]map[string]string{
appName: map[string]string{"version": appVersion, "md5_checksum": checksumString},
}
I've created a nested map rather than a struct. This allows me just initialize the map when I've collected all my values rather than trying to work around struct field names. My output is now:
appName:
md5_checksum: checksumString
version: appVersion
Thanks for all the help!
answered Nov 26 '18 at 22:26
Tim BrammerTim Brammer
35
add a comment |
I've solved my own problem with help from KibGzr.
No structs necessary just for the marshaling steps.
yamlData := map[string]map[string]string{
appName: map[string]string{"version": appVersion, "md5_checksum": checksumString},
}
I've created a nested map rather than a struct. This allows me just initialize the map when I've collected all my values rather than trying to work around struct field names. My output is now:
appName:
md5_checksum: checksumString
version: appVersion
Thanks for all the help!
answered Nov 26 '18 at 22:26
Tim BrammerTim Brammer
35
I've solved my own problem with help from KibGzr.
No structs necessary just for the marshaling steps.
yamlData := map[string]map[string]string{
appName: map[string]string{"version": appVersion, "md5_checksum": checksumString},
}
I've created a nested map rather than a struct. This allows me just initialize the map when I've collected all my values rather than trying to work around struct field names. My output is now:
appName:
md5_checksum: checksumString
version: appVersion
Thanks for all the help!
answered Nov 26 '18 at 22:26
Tim BrammerTim Brammer
35
answered Nov 26 '18 at 22:26
Tim BrammerTim Brammer
35
answered Nov 26 '18 at 22:26
Tim BrammerTim Brammer
35
answered Nov 26 '18 at 22:26
Tim BrammerTim Brammer
35
35
add a comment |
add a comment |
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See example of nested yaml struct
– Mark
Nov 26 '18 at 1:38