How can I avoid type mismatch between int and float

[amreo]

Hi. When I execute this code I get the error panic: type mismatch on Port field: found float64, expected uint16. How can I avoid this error?

package main

import (
	"encoding/json"
	"fmt"

	"github.com/imdario/mergo"
)

const configuration string = `
{
	"Port": 80
}
`

func main() {
	type Config struct {
		Port uint16
	}

	foo := make(map[string]interface{})
	json.Unmarshal([]byte(configuration), &foo)
	myconfig := Config{}
	
	err := mergo.MapWithOverwrite(&myconfig, foo)
	if err != nil {
		panic(err)
	}
	fmt.Println(myconfig)
}

[darccio]

@amreo You can't. encoding/json always unmarshals numbers as float64. Mergo doesn't cast values, so you have to write your Config struct like this:

type Config struct {
	Port float64
}