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What's new in SeaORM 0.12.x

Β· 7 min read
SeaQL Team
SeaORM 0.12 Banner

It had been a while since the initial SeaORM 0.12 release. This blog post summarizes the new features and enhancements introduced in SeaORM 0.12.2 through 0.12.12!

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New Features​

Entity format update​

  • #1898 Add support for root JSON arrays (requires the json-array / postgres-array feature)! It involved an intricate type system refactor to work around the orphan rule.
#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
#[sea_orm(table_name = "json_struct_vec")]
pub struct Model {
pub id: i32,
#[sea_orm(column_type = "Json")]
pub struct_vec: Vec<JsonColumn>,

#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize, FromJsonQueryResult)]
pub struct JsonColumn {
pub value: String,
  • #2009 Added comment attribute for Entity; create_table_from_entity now supports comment on MySQL
#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
#[sea_orm(table_name = "applog", comment = "app logs")]
pub struct Model {
#[sea_orm(primary_key, comment = "ID")]
pub id: i32,
#[sea_orm(comment = "action")]
pub action: String,
pub json: Json,
pub created_at: DateTimeWithTimeZone,

Cursor paginator improvements​

  • #2037 Added descending order to Cursor:
// (default behaviour) Before 5 ASC, i.e. id < 5

let mut cursor = Entity::find().cursor_by(Column::Id);

Model { id: 1 },
Model { id: 2 },
Model { id: 3 },
Model { id: 4 },

// (new API) After 5 DESC, i.e. id < 5

let mut cursor = Entity::find().cursor_by(Column::Id);

Model { id: 4 },
Model { id: 3 },
Model { id: 2 },
Model { id: 1 },
  • #1826 Added cursor support to SelectTwo:
// Join with linked relation; cursor by first table's id


// Join with relation; cursor by the 2nd table's id


Added "proxy" to database backend​

#1881, #2000 Added "proxy" to database backend (requires feature flag proxy).

It enables the possibility of using SeaORM on edge / client-side! See the GlueSQL demo for an example.


  • #1954 [sea-orm-macro] Added #[sea_orm(skip)] to FromQueryResult derive macro
#[derive(Clone, Debug, PartialEq, Eq, Deserialize, Serialize, FromQueryResult)]
pub struct PublicUser {
pub id: i64,
pub name: String,
#[serde(skip_serializing_if = "Vec::is_empty")]
pub something: Something,
  • #1598 [sea-orm-macro] Added support for Postgres arrays in FromQueryResult impl of JsonValue
// existing API:

Some(Model {
id: 1,
name: "Collection 1".into(),
integers: vec![1, 2, 3],
teas: vec![Tea::BreakfastTea],
colors: vec![Color::Black],

// new API:

"id": 1,
"name": "Collection 1",
"integers": [1, 2, 3],
"teas": ["BreakfastTea"],
"colors": [0],
  • #1828 [sea-orm-migration] Check if an index exists
use sea_orm_migration::prelude::*;
pub struct Migration;
impl MigrationTrait for Migration {
async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
// ...

// Make sure the index haven't been created
assert!(!manager.has_index("cake", "cake_name_index").await?);



async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
// ...
  • #2030 Improve query performance of Paginator's COUNT query
  • #2055 Added SQLx slow statements logging to ConnectOptions
  • #1867 Added QuerySelect::lock_with_behavior
  • #2002 Cast enums in is_in and is_not_in
  • #1999 Add source annotations to errors
  • #1960 Implement StatementBuilder for sea_query::WithQuery
  • #1979 Added method expr_as_ that accepts self
  • #1868 Loader: use ValueTuple as hash key
  • #1934 [sea-orm-cli] Added --enum-extra-derives
  • #1952 [sea-orm-cli] Added --enum-extra-attributes
  • #1693 [sea-orm-cli] Support generation of related entity with composite foreign key

Bug fixes​

  • #1855, #2054 [sea-orm-macro] Qualify types in DeriveValueType macro
  • #1953 [sea-orm-cli] Fix duplicated active enum use statements on generated entities
  • #1821 [sea-orm-cli] Fix entity generation for non-alphanumeric enum variants
  • #2071 [sea-orm-cli] Fix entity generation for relations with composite keys
  • #1800 Fixed find_with_related consolidation logic
  • 5a6acd67 Fixed Loader panic on empty inputs


  • #1984 Upgraded axum example to 0.7
  • #1858 Upgraded chrono to 0.4.30
  • #1959 Upgraded rocket to 0.5.0
  • Upgraded sea-query to 0.30.5
  • Upgraded sea-schema to 0.14.2
  • Upgraded salvo to 0.50

House Keeping​

  • #2057 Fix clippy warnings on 1.75
  • #1811 Added test cases for find_xxx_related/linked

Release planning​

In the announcement blog post of SeaORM 0.12, we stated we want to reduce the frequency of breaking releases while maintaining the pace for feature updates and enhancements. I am glad to say we've accomplished that!

There are still a few breaking changes planned for the next major release. After some discussions and consideration, we decided that the next major release will be a release candidate for 1.0!

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