Why use difference type receiver?

[luzj]

Hello,

Why use difference type receiver?
func (c Carbon) Value() (driver.Value, error)
func (t *DateTime) Value() (driver.Value, error)
one is value receiver, another is pointer receiver

if one struct

type LogData struct {
ID uint32
CreateDay carbon.Carbon
CreateTime carbon.DateTime
}

use gorm to create record, you will see a error

"sql: converting argument $2 type: unsupported type carbon.DateTime, a struct"

if you want to create success, you must define struct like this:
type LogData struct {
ID uint32
CreateDay carbon.Carbon
CreateTime *carbon.DateTime
}

This is really weird.

[gouguoyin]

I will test and verify