Trait SelectExt 

pub trait SelectExt {
    // Provided method
    fn exists<'life0, 'async_trait, C>(
        self,
        db: &'life0 C,
    ) -> Pin<Box<dyn Future<Output = Result<bool, DbErr>> + Send + 'async_trait>>
       where C: ConnectionTrait + 'async_trait,
             Self: Send + Sized + Send + 'async_trait,
             'life0: 'async_trait { ... }
}

Helper trait for selectors with convenient methods

Provided Methods

fn exists<'life0, 'async_trait, C>( self, db: &'life0 C, ) -> Pin<Box<dyn Future<Output = Result<bool, DbErr>> + Send + 'async_trait>>

where C: ConnectionTrait + 'async_trait, Self: Send + Sized + Send + 'async_trait, 'life0: 'async_trait,

Check if any records exist

Implementors

impl<E> SelectExt for Select<E>

where E: EntityTrait,

impl<E, F> SelectExt for SelectTwo<E, F>

where E: EntityTrait, F: EntityTrait,

impl<E, F, G, H, I, J, TOP> SelectExt for SelectSix<E, F, G, H, I, J, TOP>

where E: EntityTrait, F: EntityTrait, G: EntityTrait, H: EntityTrait, I: EntityTrait, J: EntityTrait, TOP: Topology,

impl<E, F, G, H, I, TOP> SelectExt for SelectFive<E, F, G, H, I, TOP>

where E: EntityTrait, F: EntityTrait, G: EntityTrait, H: EntityTrait, I: EntityTrait, TOP: Topology,

impl<E, F, G, H, TOP> SelectExt for SelectFour<E, F, G, H, TOP>

where E: EntityTrait, F: EntityTrait, G: EntityTrait, H: EntityTrait, TOP: Topology,

impl<E, F, G, TOP> SelectExt for SelectThree<E, F, G, TOP>

where E: EntityTrait, F: EntityTrait, G: EntityTrait, TOP: Topology,

impl<S> SelectExt for Selector<S>

where S: SelectorTrait,

impl<S> SelectExt for SelectorRaw<S>

where S: SelectorTrait,