Error: "gob: type not registered for interface: map[string]interface {}"
In Go, the gob package provides support for encoding and decoding values into a binary representation. However, when trying to encode a map[string]interface{} value using gob, you may encounter the error:
gob: type not registered for interface: map[string]interface {}
This error signifies that the gob package is not aware of the type map[string]interface{}. To resolve this issue, you must explicitly register the type using the gob.Register function.
gob.Register(map[string]interface{}{})
By registering the type, you are informing the gob package that it should recognize and handle map[string]interface{} values during encoding and decoding operations.
Here's a modified version of the code you provided that includes the necessary registration:
package main import ( "bytes" "encoding/gob" "encoding/json" "fmt" "log" ) func CloneObject(a, b interface{}) []byte { buff := new(bytes.Buffer) enc := gob.NewEncoder(buff) dec := gob.NewDecoder(buff) // Register the map[string]interface{} type for encoding gob.Register(map[string]interface{}{}) err := enc.Encode(a) if err != nil { log.Panic("e1: ", err) } b1 := buff.Bytes() err = dec.Decode(b) if err != nil { log.Panic("e2: ", err) } return b1 } func main() { var a interface{} a = map[string]interface{}{"X": 1} b2, err := json.Marshal(&a) fmt.Println(string(b2), err) var b interface{} b1 := CloneObject(&a, &b) fmt.Println(string(b1)) }
After registering the type, you can successfully encode and decode the map[string]interface{} value using gob.
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