How to convert the value inside an interface into a map in golang?

Question

I am a complete newbie to GO.

My objective is to get the data inside item.Data and put them into a map so that I can access them as a key value pair.

As far as I understand an empty interface is as same as any type in Typescript.

Can you please share a snippet of how to do it in goLang?

type SearchLogsResponse struct {

    // The underlying http response
    RawResponse *http.Response

    // A list of SearchResponse instances
    SearchResponse `presentIn:"body"`

    // For list pagination. When this header appears in the response, additional pages
    // of results remain. For important details about how pagination works, see
    // List Pagination (https://docs.cloud.oracle.com/iaas/Content/API/Concepts/usingapi.htm#nine).
    OpcNextPage *string `presentIn:"header" name:"opc-next-page"`

    // Unique Oracle-assigned identifier for the request. If you need to contact
    // Oracle about a particular request, please provide the request ID.
    OpcRequestId *string `presentIn:"header" name:"opc-request-id"`
}

// SearchResult A log search result entry

type SearchResult struct {

    // JSON blob containing the search entry with projected fields.
    Data *interface{} `mandatory:"true" json:"data"`
}


// SearchResponse Search response object.
type SearchResponse struct {
    Summary *SearchResultSummary `mandatory:"true" json:"summary"`

    // List of search results
    Results []SearchResult `mandatory:"false" json:"results"`

    // List of log field schema information.
    Fields []FieldInfo `mandatory:"false" json:"fields"`
}

res, err1 := o.loggingSearchClient.SearchLogs(ctx, request)
    for _, item := range res.Results {

            //TODO create a map string [string]

            // Put key value pairs from item into the above map




}

P.S: The data inside item.Data is a list of key value pair where each key could contain data inside another interface whose value is a string

Edit : Keys are dynamic

Github Link

Do you know all the keys inside intem.Data or the list of keys is dynamic? — nvcnvn, Aug 28 '20 at 01:49
Sorry, nobody's going to go through a 600 line source file. Add the relevant pieces to your post. — Burak Serdar, Aug 28 '20 at 03:11
Sorry, that's ls a link pointing to that particular line to provide a better context @BurakSerdar — Athul Muralidharan, Aug 28 '20 at 03:28
"I am a complete newbie to GO." Take the Tour of Go and do the exercises. This will be much more helpful for you in the long run. — Volker, Aug 28 '20 at 05:45
@Volker Will do for sure but I had to do a minor fix that was time bound, hence asked here. — Athul Muralidharan, Aug 28 '20 at 09:21

Burak Serdar · Accepted Answer · 2020-08-28T05:04:16.387

3

First: do not use *interface{}, instead use interface{}.

You can use type assertions to test the underlying type of Data and recursively descend if it is a map[string]interface{}:

(You mentioned this is part of the SDK and cannot be changed, so the workaround is to dereference the interface)

if m, ok:=(*item.Data).(map[string]interface{}); ok {
   // m is a map[string]interface{}
   etag:=m["data.eTag"]
   // etag is an interface{}
   if str, ok:=etag.(string); ok {
      // str contains the string value
   }
}

edited Aug 28 '20 at 05:04

answered Aug 28 '20 at 04:00

Burak Serdar

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First: do not use *interface{}, instead use interface{} This cannot be done , because it is part of the sdk that is being imported Can you please suggest a work around ? – Athul Muralidharan Aug 28 '20 at 05:00
1

Edited the answer to dereference – Burak Serdar Aug 28 '20 at 05:04

How to convert the value inside an interface into a map in golang?

1 Answers1