Custom Unmarshal functions to support floats and strings interchangabely.

custom_numeric.go

//https://stackoverflow.com/questions/73573695/go-custom-unmarshaler-string-to-float
type CustomFloat float64
type CustomInt int64

func (c *CustomFloat) UnmarshalJSON(b []byte) error {
	var s interface{}
	if err := json.Unmarshal(b, &s); err != nil {
		return err
	}
	switch v := s.(type) {
	case float64:
		*c = CustomFloat(v)
	case string:
		x, _ := strconv.ParseFloat(v, 64)
		*c = CustomFloat(x)
	}
	return nil
}

func (c *CustomInt) UnmarshalJSON(b []byte) error {
	var s interface{}
	if err := json.Unmarshal(b, &s); err != nil {
		return err
	}
	switch v := s.(type) {
	case float64:
		i := int(v)
		*c = CustomInt(i)
	case string:
		x, _ := strconv.ParseInt(v, 10, 64)
		*c = CustomInt(x)
	}
	return nil
}