Antonio Scandurra df2dcdabac
Prevent returning connections to pool with a positive transaction depth (#1283)
Mark transaction as closed *only* after commit/rollback succeeds.

Previously, `open` on the transaction would be set to `false` prior to attempting
to commit or rollback the transaction. When the operation failed, for example, due
to a serialization failure with a serializable isolation level, this would leave
the transaction in an inconsistent state, where it thought it was closed but really
it was still open. The connection would then be returned to the connection pool with
a transaction depth of 1, causing a savepoint to be erroneously created the next time
a transaction was created for the connection.

By waiting to set `open` to `false` until the commit/rollback succeeds, a failure
to do either will result in us correctly rolling back the transaction when dropping
it, ensuring that the connection is returned to the pool with a transaction depth
of 0. Note that this is consistent with how `sqlx` handles transactions.

We attempted to write a test, but had a very difficult time forcing postgres to fail
to commit a transaction. We found that it would block our requests instead when creating
conflicting updates, and we couldn't find any information about when it blocks vs when
transaction commits fail.

Co-Authored-By: Nathan Sobo <nathan@zed.dev>

Co-authored-by: Nathan Sobo <nathan@zed.dev>
2022-12-16 21:11:51 +08:00
2021-06-22 22:29:34 +08:00
2022-12-16 15:52:00 +08:00
2022-12-16 15:52:00 +08:00
2022-12-16 16:48:16 +08:00
2022-11-06 13:00:05 +08:00
2022-06-12 20:20:28 +08:00
2022-12-16 15:52:00 +08:00
2022-12-16 15:53:58 +08:00
2022-09-28 00:13:35 +08:00
2021-06-14 23:58:53 +08:00
2021-07-17 21:50:11 +08:00
2022-11-16 14:09:48 +08:00
2021-09-03 14:56:27 +08:00

SeaORM

🐚 An async & dynamic ORM for Rust

crate docs build status

SeaORM

SeaORM is a relational ORM to help you build web services in Rust with the familiarity of dynamic languages.

Getting Started

GitHub stars If you like what we do, consider starring, commenting, sharing and contributing!

Discord Join our Discord server to chat with others in the SeaQL community!

Integration examples

Features

  1. Async

    Relying on SQLx, SeaORM is a new library with async support from day 1.

  2. Dynamic

    Built upon SeaQuery, SeaORM allows you to build complex queries without 'fighting the ORM'.

  3. Testable

    Use mock connections to write unit tests for your logic.

  4. Service Oriented

    Quickly build services that join, filter, sort and paginate data in APIs.

A quick taste of SeaORM

Entity

use sea_orm::entity::prelude::*;

#[derive(Clone, Debug, PartialEq, DeriveEntityModel)]
#[sea_orm(table_name = "cake")]
pub struct Model {
    #[sea_orm(primary_key)]
    pub id: i32,
    pub name: String,
}

#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
pub enum Relation {
    #[sea_orm(has_many = "super::fruit::Entity")]
    Fruit,
}

impl Related<super::fruit::Entity> for Entity {
    fn to() -> RelationDef {
        Relation::Fruit.def()
    }
}

Select

// find all models
let cakes: Vec<cake::Model> = Cake::find().all(db).await?;

// find and filter
let chocolate: Vec<cake::Model> = Cake::find()
    .filter(cake::Column::Name.contains("chocolate"))
    .all(db)
    .await?;

// find one model
let cheese: Option<cake::Model> = Cake::find_by_id(1).one(db).await?;
let cheese: cake::Model = cheese.unwrap();

// find related models (lazy)
let fruits: Vec<fruit::Model> = cheese.find_related(Fruit).all(db).await?;

// find related models (eager)
let cake_with_fruits: Vec<(cake::Model, Vec<fruit::Model>)> =
    Cake::find().find_with_related(Fruit).all(db).await?;

Insert

let apple = fruit::ActiveModel {
    name: Set("Apple".to_owned()),
    ..Default::default() // no need to set primary key
};

let pear = fruit::ActiveModel {
    name: Set("Pear".to_owned()),
    ..Default::default()
};

// insert one
let pear = pear.insert(db).await?;

// insert many
Fruit::insert_many(vec![apple, pear]).exec(db).await?;

Update

use sea_orm::sea_query::{Expr, Value};

let pear: Option<fruit::Model> = Fruit::find_by_id(1).one(db).await?;
let mut pear: fruit::ActiveModel = pear.unwrap().into();

pear.name = Set("Sweet pear".to_owned());

// update one
let pear: fruit::Model = pear.update(db).await?;

// update many: UPDATE "fruit" SET "cake_id" = NULL WHERE "fruit"."name" LIKE '%Apple%'
Fruit::update_many()
    .col_expr(fruit::Column::CakeId, Expr::value(Value::Int(None)))
    .filter(fruit::Column::Name.contains("Apple"))
    .exec(db)
    .await?;

Save

let banana = fruit::ActiveModel {
    id: NotSet,
    name: Set("Banana".to_owned()),
    ..Default::default()
};

// create, because primary key `id` is `NotSet`
let mut banana = banana.save(db).await?;

banana.name = Set("Banana Mongo".to_owned());

// update, because primary key `id` is `Set`
let banana = banana.save(db).await?;

Delete

// delete one
let orange: Option<fruit::Model> = Fruit::find_by_id(1).one(db).await?;
let orange: fruit::Model = orange.unwrap();
fruit::Entity::delete(orange.into_active_model())
    .exec(db)
    .await?;

// or simply
let orange: Option<fruit::Model> = Fruit::find_by_id(1).one(db).await?;
let orange: fruit::Model = orange.unwrap();
orange.delete(db).await?;

// delete many: DELETE FROM "fruit" WHERE "fruit"."name" LIKE 'Orange'
fruit::Entity::delete_many()
    .filter(fruit::Column::Name.contains("Orange"))
    .exec(db)
    .await?;

Learn More

  1. Design
  2. Architecture
  3. Release Model
  4. Change Log

Who's using SeaORM?

The following products are powered by SeaORM:



A lightweight web security auditing toolkit

The enterprise ready webhooks service

A personal search engine

SeaORM is the foundation of:

For more projects, see Built with SeaORM.

License

Licensed under either of

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

SeaORM is a community driven project. We welcome you to participate, contribute and together help build Rust's future.

A big shout out to our contributors:

Contributors

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