Struct Selector 

pub struct Selector<S>
where
    S: SelectorTrait,
{ /* private fields */ }

Defines a type to do SELECT operations through a SelectStatement on a Model

Implementations

impl<S> Selector<S>

where S: SelectorTrait,

pub fn into_statement(self, builder: DbBackend) -> Statement

Get the SQL statement

pub async fn one<C>(self, db: &C) -> Result<Option<S::Item>, DbErr>

where C: ConnectionTrait,

Get an item from the Select query

pub async fn all<C>(self, db: &C) -> Result<Vec<S::Item>, DbErr>

where C: ConnectionTrait,

Get all items from the Select query

pub async fn stream<'a: 'b, 'b, C>( self, db: &'a C, ) -> Result<Pin<Box<dyn Stream<Item = Result<S::Item, DbErr>> + Send + 'b>>, DbErr>

where C: ConnectionTrait + StreamTrait + Send, S: 'b, S::Item: Send,

Stream the results of the Select operation

Trait Implementations

impl<S> Clone for Selector<S>

where S: SelectorTrait + Clone,

fn clone(&self) -> Selector<S>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<S> Debug for Selector<S>

where S: SelectorTrait + Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'db, C, S> PaginatorTrait<'db, C> for Selector<S>

where C: ConnectionTrait, S: SelectorTrait + Send + Sync + 'db,

type Selector = S

Select operation

fn paginate(self, db: &'db C, page_size: u64) -> Paginator<'db, C, S>

Paginate the result of a select operation.

fn count<'async_trait>( self, db: &'db C, ) -> Pin<Box<dyn Future<Output = Result<u64, DbErr>> + Send + 'async_trait>>

where Self: Send + Sized + Send + 'async_trait, 'db: 'async_trait,

Perform a count on the paginated results

impl<S> SelectExt for Selector<S>

where S: SelectorTrait,

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