How should I use type mapinterface {} in golang

Question content

I am trying to retrieve data from the api. When I get data from api:

result, _ := s.getcases() // get cases via api
fmt.println(reflect.typeof(result.records[0]["cases"]))

It shows the type of result. records[0]["cases"] is map[string]interface {}

But, obviously I can't use this directly as a map. since:

fmt.println(reflect.typeof(result.records[0]["cases"]["id"]))

This will result in a compiler error:

invalid operation: cannot index result.Records[0]["Cases"] (map index
expression of type interface{})

May I know how to use this type in golang?

Correct answer

The value is of type interface{}, and according to the output of reflection, there is a map in the interface [string]interface{} value. Therefore, you must use type assertions to get the actual value stored in the interface:

fmt.Println(reflect.TypeOf(result.Records[0]["Cases"].(map[string]interface{})["Id"]))

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