Parse yaml return empty object - go

Question

I have the following yaml which I need to parse to struct.
In the builds property I got empty value while debug, what am I missing here?
I use "gopkg.in/yaml.v2"
- name: srv
type: java
path: srv
builds:
- name: db
properties:
JBR_CONFIG_RESOURCE_CONFIG: '[META-INF/context.xml:
{"service_name" : "~{h-container}"}]'
TEST2: aaaa
The struct is
type Runs struct {
Name string
Type string
Path string `yaml:"path,omitempty"`
Builds []Builds `yaml:”builds,omitempty"`
}
type Builds struct {
Name string `yaml:"name,omitempty"`
Properties Properties `yaml:"properties,omitempty"`
}
type Properties map[string]string

Answer 1

Properly formated yaml is the first thing that you should consider.
If u wanna have one Runs you should have your yaml formated something like that
name: srv
builds:
-
name: db
properties:
JBR_CONFIG_RESOURCE_CONFIG: "[META-INF/context.xml:
{\"service_name\" : \"~{h-container}\"}]"
TEST2: aaaa
path: srv
type: java
But then i u wanna have more of this object you need to group them in one parameter. It can look like this
runs:
-
name: srv
builds:
-
name: db
properties:
JBR_CONFIG_RESOURCE_CONFIG: "[META-INF/context.xml:
{\"service_name\" : \"~{h-container}\"}]"
TEST2: aaaa
path: srv
type: java
-
name: srv2
builds:
-
name: db2
properties:
JBR_CONFIG_RESOURCE_CONFIG: "[META-INF/context.xml:
{\"service_name\" : \"~{h-container}\"}]"
TEST2: aaaa2
path: srv2
type: java2
And then in your code could look like this
package main
import (
"fmt"
"gopkg.in/yaml.v2"
"io/ioutil"
"log"
"os"
)
type Document struct {
Runs []Runs `yaml:"runs,omitempty"`
}
type Runs struct {
Name string `yaml:"name,omitempty"`
Type string `yaml:"type,omitempty"`
Path string `yaml:"path,omitempty"`
Builds []Builds `yaml:"builds,omitempty"`
}
type Builds struct {
Name string `yaml:"name,omitempty"`
Properties map[string]string `yaml:"properties,omitempty"`
}
func main() {
var document Document
reader, err := os.Open("demo.yml")
if err != nil {
log.Fatal(err)
}
buf, _ := ioutil.ReadAll(reader)
yaml.Unmarshal(buf, &document)
if err := yaml.Unmarshal(buf, &document); err != nil {
fmt.Print(err)
os.Exit(1)
}
fmt.Println(document)
}

Answer 2

Make sure your yaml file is formatted correctly. Check with this tool.
The following piece of code worked fine.
package main
import (
"fmt"
"gopkg.in/yaml.v2"
"log"
)
type Runs struct {
Name string
Type string
Path string `yaml:"path,omitempty"`
Builds []Builds `yaml:”builds,omitempty"`
}
type Builds struct {
Name string `yaml:"name,omitempty"`
Properties Properties `yaml:"properties,omitempty"`
}
type Properties map[string]string
func main() {
data := `builds:
-
name: db
properties:
JBR_CONFIG_RESOURCE_CONFIG: "[META-INF/context.xml: {\"service_name\" : \"~{h-container}\"}]"
TEST2: aaaa
name: srv
path: srv
type: java
`
runs := Runs{}
err := yaml.Unmarshal([]byte(data), &runs)
if err != nil {
log.Fatalf("error: %v", err)
}
fmt.Printf("--- t:\n%v\n\n", runs)
d, err := yaml.Marshal(&runs)
if err != nil {
log.Fatalf("error: %v", err)
}
fmt.Printf("--- t dump:\n%s\n\n", string(d))
}
I hope this helps!