diesel/expression/
not.rs

1use crate::expression::grouped::Grouped;
2use crate::expression::Expression;
3use crate::helper_types;
4use crate::sql_types::BoolOrNullableBool;
5
6/// Creates a SQL `NOT` expression
7///
8/// # Example
9///
10/// ```rust
11/// # include!("../doctest_setup.rs");
12/// #
13/// # fn main() {
14/// #     use schema::users::dsl::*;
15/// #     let connection = &mut establish_connection();
16/// use diesel::dsl::not;
17///
18/// let users_with_name = users.select(id).filter(name.eq("Sean"));
19/// let users_not_with_name = users.select(id).filter(not(name.eq("Sean")));
20///
21/// assert_eq!(Ok(1), users_with_name.first(connection));
22/// assert_eq!(Ok(2), users_not_with_name.first(connection));
23/// # }
24/// ```
25pub fn not<T>(expr: T) -> helper_types::not<T>
26where
27    T: Expression,
28    <T as Expression>::SqlType: BoolOrNullableBool,
29{
30    super::operators::Not::new(Grouped(expr))
31}
diesel/expression/not.rs

diesel/expression/
not.rs
