Macro diesel::AsChangeset

macro_rules! AsChangeset {
    ($($args:tt)*) => { ... };
}

Implements the AsChangeset trait for a given struct. This macro should be called with the name of the table you wish to use the struct with, followed by the entire struct body. This macro mirrors #[as_changeset] from diesel_codegen

Options

• treat_none_as_null (boolean)
  • Default value: "false"
  • When set to "true", option fields will set the column to NULL when their value is None. When set to "false", the field will not be assigned.

Example

#[derive(PartialEq, Debug)]
struct User {
    id: i32,
    name: String,
}

AsChangeset! {
    (users)
    struct User {
        id: i32,
        name: String,
    }
}



diesel::insert(&NewUser::new("Sean"))
    .into(users)
    .execute(&connection)
    .unwrap();
let user_id = users.select(id).order(id.desc()).first(&connection).unwrap();
let changes = User::new(user_id, "Jim");
diesel::update(users.find(user_id))
    .set(&changes)
    .execute(&connection)
    .unwrap();

let user_in_db = users.find(user_id).first(&connection);
assert_eq!(Ok(changes), user_in_db);