Change method signature of expr_as to accept self #1979

src/query/helper.rs

@@ -511,6 +511,8 @@ pub trait QuerySelect: Sized {
     ///     "SELECT `cake`.`id`, `cake`.`name`, UPPER(`cake`.`name`) AS `name_upper` FROM `cake`"
     /// );
     /// ```
+    ///
+    /// FIXME: change signature to `mut self`
     fn expr_as<T, A>(&mut self, expr: T, alias: A) -> &mut Self
     where
         T: Into<SimpleExpr>,
@@ -519,6 +521,34 @@ pub trait QuerySelect: Sized {
         self.query().expr_as(expr, alias.into_identity());
         self
     }
+
+    /// Owned version of `expr_as`.
+    ///
+    /// Select column.
+    ///
+    /// ```
+    /// use sea_orm::sea_query::{Alias, Expr, Func};
+    /// use sea_orm::{entity::*, tests_cfg::cake, DbBackend, QuerySelect, QueryTrait};
+    ///
+    /// assert_eq!(
+    ///     cake::Entity::find()
+    ///         .expr_as(
+    ///             Func::upper(Expr::col((cake::Entity, cake::Column::Name))),
+    ///             "name_upper"
+    ///         )
+    ///         .build(DbBackend::MySql)
+    ///         .to_string(),
+    ///     "SELECT `cake`.`id`, `cake`.`name`, UPPER(`cake`.`name`) AS `name_upper` FROM `cake`"
+    /// );
+    /// ```
+    fn expr_as_<T, A>(mut self, expr: T, alias: A) -> Self
+    where
+        T: Into<SimpleExpr>,
+        A: IntoIdentity,
+    {
+        self.query().expr_as(expr, alias.into_identity());
+        self
+    }
 }
 
 // LINT: when the column does not appear in tables selected from