Function not

pub fn not<T>(expr: T) -> not<T>
where
    T: Expression,
    <T as Expression>::SqlType: BoolOrNullableBool,

Creates a SQL NOT expression

Example

use diesel::dsl::not;

let users_with_name = users.select(id).filter(name.eq("Sean"));
let users_not_with_name = users.select(id).filter(
    not(name.eq("Sean")));

assert_eq!(Ok(1), users_with_name.first(connection));
assert_eq!(Ok(2), users_not_with_name.first(connection));