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use crate::{expr::*, types::*};
pub trait OrderedStatement {
#[doc(hidden)]
// Implementation for the trait.
fn add_order_by(&mut self, order: OrderExpr) -> &mut Self;
/// Clear order expressions
fn clear_order_by(&mut self) -> &mut Self;
/// Order by column.
///
/// # Examples
///
/// Order by ASC and DESC
/// ```
/// use sea_query::{*, tests_cfg::*};
///
/// let query = Query::select()
/// .column(Glyph::Aspect)
/// .from(Glyph::Table)
/// .and_where(Expr::col(Glyph::Aspect).if_null(0).gt(2))
/// .order_by(Glyph::Image, Order::Desc)
/// .order_by((Glyph::Table, Glyph::Aspect), Order::Asc)
/// .to_owned();
///
/// assert_eq!(
/// query.to_string(MysqlQueryBuilder),
/// r#"SELECT `aspect` FROM `glyph` WHERE IFNULL(`aspect`, 0) > 2 ORDER BY `image` DESC, `glyph`.`aspect` ASC"#
/// );
/// ```
///
/// Order by custom field ordering
/// ```
/// use sea_query::{tests_cfg::*, *};
///
/// let query = Query::select()
/// .columns([Glyph::Aspect])
/// .from(Glyph::Table)
/// .order_by(
/// Glyph::Id,
/// Order::Field(Values(vec![4.into(), 5.into(), 1.into(), 3.into()])),
/// )
/// .to_owned();
///
/// assert_eq!(
/// query.to_string(MysqlQueryBuilder),
/// [
/// r#"SELECT `aspect`"#,
/// r#"FROM `glyph`"#,
/// r#"ORDER BY CASE"#,
/// r#"WHEN `id`=4 THEN 0"#,
/// r#"WHEN `id`=5 THEN 1"#,
/// r#"WHEN `id`=1 THEN 2"#,
/// r#"WHEN `id`=3 THEN 3"#,
/// r#"ELSE 4 END"#,
/// ]
/// .join(" ")
/// );
///
/// assert_eq!(
/// query.to_string(PostgresQueryBuilder),
/// [
/// r#"SELECT "aspect""#,
/// r#"FROM "glyph""#,
/// r#"ORDER BY CASE"#,
/// r#"WHEN "id"=4 THEN 0"#,
/// r#"WHEN "id"=5 THEN 1"#,
/// r#"WHEN "id"=1 THEN 2"#,
/// r#"WHEN "id"=3 THEN 3"#,
/// r#"ELSE 4 END"#,
/// ]
/// .join(" ")
/// );
///
/// assert_eq!(
/// query.to_string(SqliteQueryBuilder),
/// [
/// r#"SELECT "aspect""#,
/// r#"FROM "glyph""#,
/// r#"ORDER BY CASE"#,
/// r#"WHEN "id"=4 THEN 0"#,
/// r#"WHEN "id"=5 THEN 1"#,
/// r#"WHEN "id"=1 THEN 2"#,
/// r#"WHEN "id"=3 THEN 3"#,
/// r#"ELSE 4 END"#,
/// ]
/// .join(" ")
/// );
/// ```
fn order_by<T>(&mut self, col: T, order: Order) -> &mut Self
where
T: IntoColumnRef,
{
self.add_order_by(OrderExpr {
expr: SimpleExpr::Column(col.into_column_ref()),
order,
nulls: None,
})
}
/// Order by [`SimpleExpr`].
fn order_by_expr(&mut self, expr: SimpleExpr, order: Order) -> &mut Self {
self.add_order_by(OrderExpr {
expr,
order,
nulls: None,
})
}
/// Order by custom string.
fn order_by_customs<I, T>(&mut self, cols: I) -> &mut Self
where
T: ToString,
I: IntoIterator<Item = (T, Order)>,
{
cols.into_iter().for_each(|(c, order)| {
self.add_order_by(OrderExpr {
expr: SimpleExpr::Custom(c.to_string()),
order,
nulls: None,
});
});
self
}
/// Order by vector of columns.
fn order_by_columns<I, T>(&mut self, cols: I) -> &mut Self
where
T: IntoColumnRef,
I: IntoIterator<Item = (T, Order)>,
{
cols.into_iter().for_each(|(c, order)| {
self.add_order_by(OrderExpr {
expr: SimpleExpr::Column(c.into_column_ref()),
order,
nulls: None,
});
});
self
}
/// Order by column with nulls order option.
///
/// # Examples
///
/// ```
/// use sea_query::{*, tests_cfg::*};
///
/// let query = Query::select()
/// .column(Glyph::Aspect)
/// .from(Glyph::Table)
/// .order_by_with_nulls(Glyph::Image, Order::Desc, NullOrdering::Last)
/// .order_by_with_nulls((Glyph::Table, Glyph::Aspect), Order::Asc, NullOrdering::First)
/// .to_owned();
///
/// assert_eq!(
/// query.to_string(PostgresQueryBuilder),
/// r#"SELECT "aspect" FROM "glyph" ORDER BY "image" DESC NULLS LAST, "glyph"."aspect" ASC NULLS FIRST"#
/// );
/// assert_eq!(
/// query.to_string(MysqlQueryBuilder),
/// r#"SELECT `aspect` FROM `glyph` ORDER BY `image` IS NULL ASC, `image` DESC, `glyph`.`aspect` IS NULL DESC, `glyph`.`aspect` ASC"#
/// );
/// ```
fn order_by_with_nulls<T>(&mut self, col: T, order: Order, nulls: NullOrdering) -> &mut Self
where
T: IntoColumnRef,
{
self.add_order_by(OrderExpr {
expr: SimpleExpr::Column(col.into_column_ref()),
order,
nulls: Some(nulls),
})
}
/// Order by [`SimpleExpr`] with nulls order option.
fn order_by_expr_with_nulls(
&mut self,
expr: SimpleExpr,
order: Order,
nulls: NullOrdering,
) -> &mut Self {
self.add_order_by(OrderExpr {
expr,
order,
nulls: Some(nulls),
})
}
/// Order by custom string with nulls order option.
fn order_by_customs_with_nulls<I, T>(&mut self, cols: I) -> &mut Self
where
T: ToString,
I: IntoIterator<Item = (T, Order, NullOrdering)>,
{
cols.into_iter().for_each(|(c, order, nulls)| {
self.add_order_by(OrderExpr {
expr: SimpleExpr::Custom(c.to_string()),
order,
nulls: Some(nulls),
});
});
self
}
/// Order by vector of columns with nulls order option.
fn order_by_columns_with_nulls<I, T>(&mut self, cols: I) -> &mut Self
where
T: IntoColumnRef,
I: IntoIterator<Item = (T, Order, NullOrdering)>,
{
cols.into_iter().for_each(|(c, order, nulls)| {
self.add_order_by(OrderExpr {
expr: SimpleExpr::Column(c.into_column_ref()),
order,
nulls: Some(nulls),
});
});
self
}
}