migration::sea_orm::entity::prelude

Struct Select

pub struct Select<E>
where
    E: EntityTrait,
{ /* private fields */ }
Expand description

Defines a structure to perform select operations

Implementations§

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impl<E, M> Select<E>
where E: EntityTrait<Model = M>, M: FromQueryResult + Send + Sync,

pub fn cursor_by<C>(self, order_columns: C) -> Cursor<SelectModel<M>>
where C: IntoIdentity,

Convert into a cursor

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impl<E> Select<E>
where E: EntityTrait,

pub fn from_raw_sql( self, stmt: Statement, ) -> SelectorRaw<SelectModel<<E as EntityTrait>::Model>>

Perform a Select operation on a Model using a Statement

pub fn into_model<M>(self) -> Selector<SelectModel<M>>
where M: FromQueryResult,

Return a Selector from Self that wraps a SelectModel

pub fn into_partial_model<M>(self) -> Selector<SelectModel<M>>
where M: PartialModelTrait,

Return a Selector from Self that wraps a SelectModel with a PartialModel

use sea_orm::{
    entity::*,
    query::*,
    tests_cfg::cake::{self, Entity as Cake},
    DbBackend, DerivePartialModel, FromQueryResult,
};
use sea_query::{Expr, Func, SimpleExpr};

#[derive(DerivePartialModel, FromQueryResult)]
#[sea_orm(entity = "Cake")]
struct PartialCake {
    name: String,
    #[sea_orm(
        from_expr = r#"SimpleExpr::FunctionCall(Func::upper(Expr::col((Cake, cake::Column::Name))))"#
    )]
    name_upper: String,
}

assert_eq!(
    cake::Entity::find()
        .into_partial_model::<PartialCake>()
        .into_statement(DbBackend::Sqlite)
        .to_string(),
    r#"SELECT "cake"."name" AS "name", UPPER("cake"."name") AS "name_upper" FROM "cake""#
);

pub fn into_json(self) -> Selector<SelectModel<Value>>

Get a selectable Model as a JsonValue for SQL JSON operations

pub fn into_values<T, C>(self) -> Selector<SelectGetableValue<T, C>>
where T: TryGetableMany, C: IntoEnumIterator + Iden,

use sea_orm::{entity::*, query::*, tests_cfg::cake, DeriveColumn, EnumIter};

#[derive(Copy, Clone, Debug, EnumIter, DeriveColumn)]
enum QueryAs {
    CakeName,
}

let res: Vec<String> = cake::Entity::find()
    .select_only()
    .column_as(cake::Column::Name, QueryAs::CakeName)
    .into_values::<_, QueryAs>()
    .all(&db)
    .await?;

assert_eq!(
    res,
    ["Chocolate Forest".to_owned(), "New York Cheese".to_owned()]
);

assert_eq!(
    db.into_transaction_log(),
    [Transaction::from_sql_and_values(
        DbBackend::Postgres,
        r#"SELECT "cake"."name" AS "cake_name" FROM "cake""#,
        []
    )]
);
use sea_orm::{entity::*, query::*, tests_cfg::cake, DeriveColumn, EnumIter};

#[derive(Copy, Clone, Debug, EnumIter, DeriveColumn)]
enum QueryAs {
    CakeName,
    NumOfCakes,
}

let res: Vec<(String, i64)> = cake::Entity::find()
    .select_only()
    .column_as(cake::Column::Name, QueryAs::CakeName)
    .column_as(cake::Column::Id.count(), QueryAs::NumOfCakes)
    .group_by(cake::Column::Name)
    .into_values::<_, QueryAs>()
    .all(&db)
    .await?;

assert_eq!(res, [("Chocolate Forest".to_owned(), 2i64)]);

assert_eq!(
    db.into_transaction_log(),
    [Transaction::from_sql_and_values(
        DbBackend::Postgres,
        [
            r#"SELECT "cake"."name" AS "cake_name", COUNT("cake"."id") AS "num_of_cakes""#,
            r#"FROM "cake" GROUP BY "cake"."name""#,
        ]
        .join(" ")
        .as_str(),
        []
    )]
);

pub fn into_tuple<T>(self) -> Selector<SelectGetableTuple<T>>
where T: TryGetableMany,

use sea_orm::{entity::*, query::*, tests_cfg::cake};

let res: Vec<String> = cake::Entity::find()
    .select_only()
    .column(cake::Column::Name)
    .into_tuple()
    .all(&db)
    .await?;

assert_eq!(
    res,
    vec!["Chocolate Forest".to_owned(), "New York Cheese".to_owned()]
);

assert_eq!(
    db.into_transaction_log(),
    vec![Transaction::from_sql_and_values(
        DbBackend::Postgres,
        r#"SELECT "cake"."name" FROM "cake""#,
        vec![]
    )]
);
use sea_orm::{entity::*, query::*, tests_cfg::cake};

let res: Vec<(String, i64)> = cake::Entity::find()
    .select_only()
    .column(cake::Column::Name)
    .column(cake::Column::Id)
    .group_by(cake::Column::Name)
    .into_tuple()
    .all(&db)
    .await?;

assert_eq!(res, vec![("Chocolate Forest".to_owned(), 2i64)]);

assert_eq!(
    db.into_transaction_log(),
    vec![Transaction::from_sql_and_values(
        DbBackend::Postgres,
        vec![
            r#"SELECT "cake"."name", "cake"."id""#,
            r#"FROM "cake" GROUP BY "cake"."name""#,
        ]
        .join(" ")
        .as_str(),
        vec![]
    )]
);

pub async fn one<C>( self, db: &C, ) -> Result<Option<<E as EntityTrait>::Model>, DbErr>
where C: ConnectionTrait,

Get one Model from the SELECT query

pub async fn all<C>( self, db: &C, ) -> Result<Vec<<E as EntityTrait>::Model>, DbErr>
where C: ConnectionTrait,

Get all Models from the SELECT query

pub async fn stream<'a, 'b, C>( self, db: &'a C, ) -> Result<impl Stream<Item = Result<<E as EntityTrait>::Model, DbErr>> + Send + 'b, DbErr>
where 'a: 'b, C: ConnectionTrait + StreamTrait + Send,

Stream the results of a SELECT operation on a Model

pub async fn stream_partial_model<'a, 'b, C, M>( self, db: &'a C, ) -> Result<impl Stream<Item = Result<M, DbErr>> + Send + 'b, DbErr>
where 'a: 'b, C: ConnectionTrait + StreamTrait + Send, M: PartialModelTrait + Send + 'b,

Stream the result of the operation with PartialModel

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impl<E> Select<E>
where E: EntityTrait,

pub fn select_also<F>(self, _: F) -> SelectTwo<E, F>
where F: EntityTrait,

Selects extra Entity and returns it together with the Entity from Self

pub fn select_with<F>(self, _: F) -> SelectTwoMany<E, F>
where F: EntityTrait,

Makes a SELECT operation in conjunction to another relation

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impl<E> Select<E>
where E: EntityTrait,

pub fn left_join<R>(self, _: R) -> Select<E>
where R: EntityTrait, E: Related<R>,

Left Join with a Related Entity.

pub fn right_join<R>(self, _: R) -> Select<E>
where R: EntityTrait, E: Related<R>,

Right Join with a Related Entity.

pub fn inner_join<R>(self, _: R) -> Select<E>
where R: EntityTrait, E: Related<R>,

Inner Join with a Related Entity.

pub fn reverse_join<R>(self, _: R) -> Select<E>
where R: EntityTrait + Related<E>,

Join with an Entity Related to me.

Left Join with a Related Entity and select both Entity.

Left Join with a Related Entity and select the related Entity as a Vec

pub fn find_also_linked<L, T>(self, l: L) -> SelectTwo<E, T>
where L: Linked<FromEntity = E, ToEntity = T>, T: EntityTrait,

Left Join with a Linked Entity and select both Entity.

pub fn find_with_linked<L, T>(self, l: L) -> SelectTwoMany<E, T>
where L: Linked<FromEntity = E, ToEntity = T>, T: EntityTrait,

Left Join with a Linked Entity and select Entity as a Vec.

Trait Implementations§

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impl<E> Clone for Select<E>
where E: Clone + EntityTrait,

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fn clone(&self) -> Select<E>

Returns a copy of the value. Read more
1.0.0 · Source§

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

Performs copy-assignment from source. Read more
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impl<E, M> CursorTrait for Select<E>
where E: EntityTrait<Model = M>, M: FromQueryResult + Send + Sync,

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type Selector = SelectModel<M>

Select operation
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impl<E> Debug for Select<E>
where E: Debug + EntityTrait,

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

Formats the value using the given formatter. Read more
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impl<E> EntityOrSelect<E> for Select<E>
where E: EntityTrait,

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fn select(self) -> Select<E>

If self is Entity, use Entity::find()
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impl<'db, C, M, E> PaginatorTrait<'db, C> for Select<E>
where C: ConnectionTrait, E: EntityTrait<Model = M>, M: FromQueryResult + Send + Sync + 'db,

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type Selector = SelectModel<M>

Select operation
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fn paginate( self, db: &'db C, page_size: u64, ) -> Paginator<'db, C, <Select<E> as PaginatorTrait<'db, C>>::Selector>

Paginate the result of a select operation.
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fn count<'async_trait>( self, db: &'db C, ) -> Pin<Box<dyn Future<Output = Result<u64, DbErr>> + Send + 'async_trait>>
where 'db: 'async_trait, Self: Sized + Send + 'async_trait,

Perform a count on the paginated results
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impl<E> QueryFilter for Select<E>
where E: EntityTrait,

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type QueryStatement = SelectStatement

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fn query(&mut self) -> &mut SelectStatement

Add the query to perform a FILTER on
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fn filter<F>(self, filter: F) -> Self
where F: IntoCondition,

Add an AND WHERE expression Read more
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fn belongs_to<M>(self, model: &M) -> Self
where M: ModelTrait,

Apply a where condition using the model’s primary key
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fn belongs_to_tbl_alias<M>(self, model: &M, tbl_alias: &str) -> Self
where M: ModelTrait,

Perform a check to determine table belongs to a Model through it’s name alias
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impl<E> QueryOrder for Select<E>
where E: EntityTrait,

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type QueryStatement = SelectStatement

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fn query(&mut self) -> &mut SelectStatement

Add the query to perform an ORDER BY operation
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fn order_by<C>(self, col: C, ord: Order) -> Self
where C: IntoSimpleExpr,

Add an order_by expression Read more
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fn order_by_asc<C>(self, col: C) -> Self
where C: IntoSimpleExpr,

Add an order_by expression (ascending) Read more
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fn order_by_desc<C>(self, col: C) -> Self
where C: IntoSimpleExpr,

Add an order_by expression (descending) Read more
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fn order_by_with_nulls<C>(self, col: C, ord: Order, nulls: NullOrdering) -> Self
where C: IntoSimpleExpr,

Add an order_by expression with nulls ordering option Read more
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impl<E> QuerySelect for Select<E>
where E: EntityTrait,

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type QueryStatement = SelectStatement

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fn query(&mut self) -> &mut SelectStatement

Add the select SQL statement
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fn select_only(self) -> Self

Clear the selection list
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fn column<C>(self, col: C) -> Self
where C: ColumnTrait,

Add a select column Read more
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fn column_as<C, I>(self, col: C, alias: I) -> Self
where C: IntoSimpleExpr, I: IntoIdentity,

Add a select column with alias Read more
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fn columns<C, I>(self, cols: I) -> Self
where C: ColumnTrait, I: IntoIterator<Item = C>,

Select columns Read more
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fn offset<T>(self, offset: T) -> Self
where T: Into<Option<u64>>,

Add an offset expression. Passing in None would remove the offset. Read more
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fn limit<T>(self, limit: T) -> Self
where T: Into<Option<u64>>,

Add a limit expression. Passing in None would remove the limit. Read more
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fn group_by<C>(self, col: C) -> Self
where C: IntoSimpleExpr,

Add a group by column Read more
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fn having<F>(self, filter: F) -> Self
where F: IntoCondition,

Add an AND HAVING expression Read more
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fn distinct(self) -> Self

Add a DISTINCT expression Read more
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fn distinct_on<T, I>(self, cols: I) -> Self
where T: IntoColumnRef, I: IntoIterator<Item = T>,

Add a DISTINCT ON expression NOTE: this function is only supported by sqlx-postgres Read more
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fn join(self, join: JoinType, rel: RelationDef) -> Self

Join via RelationDef.
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fn join_rev(self, join: JoinType, rel: RelationDef) -> Self

Join via RelationDef but in reverse direction. Assume when there exist a relation A to B. You can reverse join B from A.
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fn join_as<I>(self, join: JoinType, rel: RelationDef, alias: I) -> Self
where I: IntoIden,

Join via RelationDef with table alias.
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fn join_as_rev<I>(self, join: JoinType, rel: RelationDef, alias: I) -> Self
where I: IntoIden,

Join via RelationDef with table alias but in reverse direction. Assume when there exist a relation A to B. You can reverse join B from A.
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fn lock(self, lock_type: LockType) -> Self

Select lock
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fn lock_shared(self) -> Self

Select lock shared
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fn lock_exclusive(self) -> Self

Select lock exclusive
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fn lock_with_behavior(self, type: LockType, behavior: LockBehavior) -> Self

Row locking with behavior (if supported). Read more
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fn expr<T>(self, expr: T) -> Self
where T: Into<SelectExpr>,

Add an expression to the select expression list. Read more
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fn exprs<T, I>(self, exprs: I) -> Self
where T: Into<SelectExpr>, I: IntoIterator<Item = T>,

Add select expressions from vector of SelectExpr. Read more
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fn expr_as<T, A>(self, expr: T, alias: A) -> Self
where T: Into<SimpleExpr>, A: IntoIdentity,

Select column. Read more
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fn expr_as_<T, A>(self, expr: T, alias: A) -> Self
where T: Into<SimpleExpr>, A: IntoIdentity,

Same as expr_as. Here for legacy reasons. Read more
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fn tbl_col_as<T, C, A>(self, _: (T, C), alias: A) -> Self
where T: IntoIden + 'static, C: IntoIden + 'static, A: IntoIdentity,

Shorthand of expr_as(Expr::col((T, C)), A). Read more
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impl<E> QueryTrait for Select<E>
where E: EntityTrait,

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type QueryStatement = SelectStatement

Constrain the QueryStatement to QueryStatementBuilder trait
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fn query(&mut self) -> &mut SelectStatement

Get a mutable ref to the query builder
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fn as_query(&self) -> &SelectStatement

Get an immutable ref to the query builder
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fn into_query(self) -> SelectStatement

Take ownership of the query builder
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fn build(&self, db_backend: DatabaseBackend) -> Statement

Build the query as Statement
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fn apply_if<T, F>(self, val: Option<T>, if_some: F) -> Self
where Self: Sized, F: FnOnce(Self, T) -> Self,

Apply an operation on the QueryTrait::QueryStatement if the given Option<T> is Some(_) Read more

Auto Trait Implementations§

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impl<E> Freeze for Select<E>

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impl<E> !RefUnwindSafe for Select<E>

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impl<E> Send for Select<E>

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impl<E> Sync for Select<E>

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impl<E> Unpin for Select<E>
where E: Unpin,

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impl<E> !UnwindSafe for Select<E>

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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where Self: Into<T>,

Converts self into T using Into<T>. Read more
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impl<T> FmtForward for T

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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.
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where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. Read more
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Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T> Instrument for T

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Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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Calls U::from(self).

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type Output = T

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impl<S> SelectColumns for S
where S: QuerySelect,

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fn select_column<C>(self, col: C) -> S
where C: ColumnTrait,

Add a select column Read more
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fn select_column_as<C, I>(self, col: C, alias: I) -> S
where C: IntoSimpleExpr, I: IntoIdentity,

Add a select column with alias Read more
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where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> ErasedDestructor for T
where T: 'static,

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impl<T> JsonSchemaMaybe for T

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impl<T> MaybeSendSync for T