Get struct field tag using Go reflect package

You don’t need to pass in the whole struct, but passing in the value of one of the fields is not sufficient.

In your example user.name field is just a string – the reflect package will have no way of correlating that back to the original struct.

Instead, you need to pass around the reflect.StructField for the given field:

field, ok := reflect.TypeOf(user).Elem().FieldByName("name")
…
tag = string(field.Tag)

Note: we use Elem above because user is a pointer to a struct.

You can play with an example here.