## Release Notes: SeaORM 2.0.0-rc.20

*(since 2.0.0-rc.19)*

### New Features

**Allow more stringy newtypes in `DeriveValueType`** (#2831)

- Produce syntax-aware attribute errors in `DeriveValueType` macro
- Allow `value_type` attr for named field structs in `DeriveValueType`
- Assume no derive attributes means `DeriveValueTypeStruct`

**Many-to-many self-referencing relation** (#2823)

- Add primary_key check to `DeriveEntityModel`
- Support `RelatedSelfVia` and `self_ref` in dense entity format
- Support `self_ref` on compact_model and in reverse
- Loader support for self via in reverse

**ActiveModelEx: support `self_ref`**

ActiveModelEx now supports self-referencing relations.

**Add nullable column types**

Support for nullable column types added.

### Bug Fixes

**Fix missing casts when returning one** (#2825)

Fixed missing type casts when using `returning_one` / `returning_all`.

**Temp fix MySQL JSON equals**

Workaround for MySQL JSON equality comparison issues.

**Automatically convert `eq(None)` to `IS NULL`** (#2826)

`eq(None)` is now correctly translated to `IS NULL` in SQL.

**Fix compile error when postgres-vector is enabled** (#2821)

Resolved compilation failure with the `postgres-vector` feature.

### Improvements

- Entity Loader: move `EntityLoaderWithParam` trait to be owned by user for better blanket impl support
- Built with SeaORM: Add FirstLook.gg (#2828)