Add QuerySelect::columns method
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billy1624
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Nov 29, 2022
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| /// Conditionally select all columns expect a specific column | ||
| /// | ||
| /// ``` | ||
| /// use sea_orm::{entity::*, query::*, tests_cfg::cake, DbBackend}; | ||
| /// | ||
| /// assert_eq!( | ||
| /// cake::Entity::find() | ||
| /// .select_only() | ||
| /// .columns(cake::Column::iter().filter(|col| match col { | ||
| /// cake::Column::Id => false, | ||
| /// _ => true, | ||
| /// })) | ||
| /// .build(DbBackend::Postgres) | ||
| /// .to_string(), | ||
| /// r#"SELECT "cake"."name" FROM "cake""# | ||
| /// ); | ||
| /// ``` |
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match were used because neither Column nor ColumnTrait implemented Eq. And we cannot implement Eq in Column, it will cause nasty conflicting method name since we already have ColumnTrait::eq method.
tyt2y3
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* Update 02-writing-migration.md * Update SeaORM/docs/03-migration/02-writing-migration.md * Support various UUID formats that are available in `uuid::fmt` module (SeaQL/sea-orm#1325) * Casting columns as a different data type on select, insert and update (SeaQL/sea-orm#1304) * Methods of `ActiveModelBehavior` receive db connection as a parameter (SeaQL/sea-orm#1145, SeaQL/sea-orm#1328) * Added `execute_unprepared` method to `DatabaseConnection` and `DatabaseTransaction` (SeaQL/sea-orm#1327) * Added `Select::into_tuple` to select rows as tuples (instead of defining a custom Model) (SeaQL/sea-orm#1311) * Generate `#[serde(skip)]` for hidden columns (SeaQL/sea-orm#1171, SeaQL/sea-orm#1320) * Generate entity with extra derives and attributes for model struct (SeaQL/sea-orm#1124, SeaQL/sea-orm#1321) * Generate entity with extra derives and attributes for model struct (SeaQL/sea-orm#1124, SeaQL/sea-orm#1321) * async_trait * Migrations are now performed inside a transaction for Postgres (SeaQL/sea-orm#1379) * `MockDatabase::append_exec_results()`, `MockDatabase::append_query_results()`, `MockDatabase::append_exec_errors()` and `MockDatabase::append_query_errors()` take any types implemented `IntoIterator` trait (SeaQL/sea-orm#1367) * Cleanup the use of `vec!` macros * Added `DatabaseConnection::close` (SeaQL/sea-orm#1236) * Added `ActiveValue::reset` to convert `Unchanged` into `Set` (SeaQL/sea-orm#1177) * Added `QueryTrait::apply_if` to optionally apply a filter (SeaQL/sea-orm#1415) * Added the `sea-orm-internal` feature flag to expose some SQLx types (SeaQL/sea-orm#1297, SeaQL/sea-orm#1434) * Add `QuerySelect::columns` method - select multiple columns (SeaQL/sea-orm#1264) * Edit * Update SeaORM/docs/02-install-and-config/02-connection.md Co-authored-by: Chris Tsang <chris.2y3@outlook.com> * Update SeaORM/docs/05-basic-crud/03-insert.md Co-authored-by: Chris Tsang <chris.2y3@outlook.com> * fmt * Edit --------- Co-authored-by: Chris Tsang <chris.2y3@outlook.com>
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PR Info
New Features
QuerySelect::columnsmethod: making it possible to conditionally select all columns expect a specific column