How to decode JSON with type convert from string to float64

Question

I need to decode a JSON string with the float number like:

{"name":"Galaxy Nexus", "price":"3460.00"} 

I use the Golang code below:

package main  import (     "encoding/json"     "fmt" )  type Product struct {     Name  string     Price float64 }  func main() {     s := `{"name":"Galaxy Nexus", "price":"3460.00"}`     var pro Product     err := json.Unmarshal([]byte(s), &pro)     if err == nil {         fmt.Printf("%+v\n", pro)     } else {         fmt.Println(err)         fmt.Printf("%+v\n", pro)     } } 

When I run it, get the result:

json: cannot unmarshal string into Go value of type float64 {Name:Galaxy Nexus Price:0} 

I want to know how to decode the JSON string with type convert.

Answer 1

The answer is considerably less complicated. Just add tell the JSON interpeter it's a string encoded float64 with ,string (note that I only changed the Price definition):

package main  import (     "encoding/json"     "fmt" )  type Product struct {     Name  string     Price float64 `json:",string"` }  func main() {     s := `{"name":"Galaxy Nexus", "price":"3460.00"}`     var pro Product     err := json.Unmarshal([]byte(s), &pro)     if err == nil {         fmt.Printf("%+v\n", pro)     } else {         fmt.Println(err)         fmt.Printf("%+v\n", pro)     } }