Trying to parse the JSON and create an extracted JSON - json

Question

I am trying to create a JSON object on the fly based on the data received from the API.
Sample Data received: Unmarshalled the data into CiItems struct given below
{
"class_name": "test",
"configuration_items": [
{
"id": "ea09a24f-01ef-42ad-ab19-e0369341d9b3",
"ci_name": "makk",
"comments": null,
"created_by": "mike",
"updated_by": "sam",
"created": "2019-08-02T21:16:35.656Z",
"updated": "2019-08-02T21:21:08.073Z",
"ci_state_id": "randomid",
"super_ci_id": null,
"ci_attributes": [
{
"attribute_id": "c995c693-b97c-4863-a61b-81a5d904c967",
"df_attribute_value": "xsmall",
"attribute_name": "tname",
"data_type": "string"
},
{
"attribute_id": "58845f48-7d2a-4c8c-8591-eaf59a23d84d",
"df_attribute_value": "vmware",
"attribute_name": "provider",
"data_type": "string"
}
]}]}
Below are the structs created:
type Attribute struct {
AttributeID string `json:"attribute_id "`
DfAttributeValue string `json:"df_attribute_value"`
AttName string `json:"attribute_name"`
DataType string `json:"data_type"`
}
// Attributes - array of Attribute
type Attributes []Attribute
// CiItem - confiuraion item of a VM
type CiItem struct {
ID string `json:"ci_id"`
Created string `json:"created"`
Updated string `json:"updated"`
CreatedBY string `json:"created_by"`
UpdatedBY string `json:"updated_by"`
Atts Attributes `json:"ci_attributes"`
}
// CiItems - array of CiItem
type CiItems struct {
ClassName string `json:"class_name"`
Items []CiItem `json:"configuration_items"`
}
Code to unmarshal the data and create a extracted Json:
func (client *Client) GetList() (CiItems, error) {
var out CiItems
err := client.doJsonRequest("GET", &out)
log.Info(out)
if err != nil {
return out, err
}
var output map[string]interface{}
//parseMap(out.Items[0].(map[string]interface{}))
extractBase(out.Items[0], &output)
return out, nil
}
func extractBase(ci interface{}, output interface{}) {
fields := reflect.TypeOf(ci)
values := reflect.ValueOf(ci)
num := fields.NumField()
for i := 0; i < num; i++ {
field := fields.Field(i)
value := values.Field(i)
if string(field.Name) != "Atts" {
name := string(field.Name)
output[name] = string(value)
}
}
}
I am trying to create a JSON with key value of id, ci_name, created_by, updated_by, attribute_name as below
{
"ci_name": "makk",
"created_by": "mike",
"updated_by": "sam",
"created": "2019-08-02T21:16:35.656Z",
"updated": "2019-08-02T21:21:08.073Z",
"tname": "xsmall",
"provider": "vmware"
}
I have tried using reflect and other methods

Answer 1

Create a map using values from CiItem fields and return it from the function.
func extractBase(ci *CiItem) map[string]interface{} {
result := map[string]interface{}{
"ci_name": ci.Name,
"created_by": ci.CreatedBY,
"updated_by": ci.UpdatedBY,
"created": ci.Created,
"updated": ci.Updated,
}
for _, a := range ci.Atts {
result[a.AttName] = a.DfAttributeValue
}
return result
}