diesel/query_dsl/
nullable_select_dsl.rs

1/// The `nullable` method
2///
3/// This trait should not be relied on directly by most apps. Its behavior is
4/// provided by [`QueryDsl`]. However you may need a where clause on this trait
5/// to call `nullable` from generic code.
6///
7/// [`QueryDsl`]: crate::QueryDsl::nullable()
8pub trait SelectNullableDsl {
9    /// The return type of `nullable`
10    type Output;
11
12    /// See the trait documentation
13    fn nullable(self) -> Self::Output;
14}