QuerySelect SimpleExpr SeaQL/sea-orm#1702

darkmmon · Jul 12, 2023 · 74e68f4 · 74e68f4
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diff --git a/SeaORM/docs/0.12.x-CHANGELOG_temp.md b/SeaORM/docs/0.12.x-CHANGELOG_temp.md
@@ -204,7 +204,6 @@ pub enum RelatedEntity {
 * Add `DeriveEntityRelated` macro https://github.com/SeaQL/sea-orm/pull/1599
 
     The DeriveRelatedEntity derive macro will implement `seaography::RelationBuilder` for `RelatedEntity` enumeration when the `seaography` feature is enabled
-    ================================ All Changes above was being Documented ================================
 
 * Add `expr`, `exprs` and `expr_as` methods to `QuerySelect` trait
 ```rs
@@ -243,6 +242,7 @@ assert_eq!(
     "SELECT `cake`.`id`, `cake`.`name`, UPPER(`cake`.`name`) AS `name_upper` FROM `cake`"
 );
 ```
+            ================================ All Changes above was being Documented ================================
 * Add `DbErr::sql_err()` method to convert error into common database errors `SqlErr`, such as unique constraint or foreign key violation errors. https://github.com/SeaQL/sea-orm/pull/1707
 ```rs
 assert!(matches!(

diff --git a/SeaORM/docs/08-advanced-query/01-custom-select.md b/SeaORM/docs/08-advanced-query/01-custom-select.md
@@ -101,6 +101,21 @@ assert_eq!(
 );
 ```
 
+Alternatively, you can simply select with `expr`, `exprs` and `expr_as` methods.
+```rust
+use sea_orm::sea_query::Expr;
+use sea_orm::{entity::*, tests_cfg::cake, DbBackend, QuerySelect, QueryTrait};
+
+assert_eq!(
+    cake::Entity::find()
+        .select_only()
+        .expr(Expr::col((cake::Entity, cake::Column::Id)))
+        .build(DbBackend::MySql)
+        .to_string(),
+    "SELECT `cake`.`id` FROM `cake`"
+);
+```
+
 ## Handling Select Results
 
 ### Custom Struct