How to restructure data - go

Question

I have a data of this format.
type PartsInfo struct {
Parts map[string]struct {
City string `yaml:"city"`
Services map[string]struct {
Disabled bool `yaml:"disabled"`
} `yaml:"services"`
} `yaml:"parts"`
}
I want to convert it into this format:
map[service]map[city][]parts where only not disabled status services need to be added. I have been trying different combinations but cant get it just the way i want.
I guess one thing I am not sure of is the destination format. Should I be using the map[service]map[city][]parts format, or would a struct be better ? I do not see how, but I have been told before the best way to pass data in go is using structs, not maps. Is that correct?

Answer 1

Is this what you want？
Go Playground: https://play.golang.org/p/N8mkD5pt1pD
package main
import "fmt"
type PartitionData struct {
Partitions map[string]Partition `yaml:"parts"`
}
type Partition struct {
City string `yaml:"city"`
Services map[string]map[string]struct {
Disabled bool `yaml:"disabled"`
} `yaml:"services"`
}
var testData = PartitionData{
Partitions: map[string]Partition{
"partition1": {City: "c1", Services: map[string]map[string]struct{
Disabled bool `yaml:"disabled"`
}{
"service1":{
"1":{
Disabled: true,
},
"2":{
Disabled: true,
},
},
"service2":{
"1":{
Disabled: true,
},
"2":{
Disabled: true,
},
},
}},
"partition2": {City: "c1", Services: map[string]map[string]struct{
Disabled bool `yaml:"disabled"`
}{
"service1":{
"1":{
Disabled: true,
},
"2":{
Disabled: true,
},
},
"service2":{
"1":{
Disabled: true,
},
"2":{
Disabled: true,
},
},
}},
},
}
func main() {
res:= make(map[string]map[string][]Partition)
for _,part := range testData.Partitions{
for serviceName :=range part.Services{
if _,found := res[serviceName];!found {
res[serviceName] = make(map[string][]Partition)
}
if _,found := res[serviceName][part.City];!found {
res[serviceName][part.City] = make([]Partition,0)
}
res[serviceName][part.City] = append(res[serviceName][part.City], part)
}
}
fmt.Println(res)
}