Use the #[serde(skip_serializing)] attribute on a struct field to exclude it from serialization output.
Add the #[serde(skip_serializing)] attribute to the specific struct field you want to exclude from the output.
use serde::Serialize;
#[derive(Serialize)]
struct User {
username: String,
#[serde(skip_serializing)]
password: String,
}
The password field will be present in the struct but omitted when serde_json::to_string(&user) is called.
Skipping fields in serde serialization tells the tool to ignore specific data when converting your object to text or JSON. It is like packing a suitcase but leaving your toiletries behind because you don't need them for the trip, even though they are still in your bathroom at home.