forked from mirrors/gotosocial
272 lines
8.3 KiB
Markdown
272 lines
8.3 KiB
Markdown
<p align="center">
|
|
<a href="https://uptrace.dev/?utm_source=gh-redis&utm_campaign=gh-redis-banner1">
|
|
<img src="https://raw.githubusercontent.com/uptrace/roadmap/master/banner1.png" alt="All-in-one tool to optimize performance and monitor errors & logs">
|
|
</a>
|
|
</p>
|
|
|
|
# Simple and performant client for PostgreSQL, MySQL, and SQLite
|
|
|
|
[](https://github.com/uptrace/bun/actions)
|
|
[](https://pkg.go.dev/github.com/uptrace/bun)
|
|
[](https://bun.uptrace.dev/)
|
|
[](https://discord.gg/rWtp5Aj)
|
|
|
|
**Status**: API freeze (stable release). Note that all sub-packages (mainly extra/\* packages) are
|
|
not part of the API freeze and are developed independently. You can think of them as 3-rd party
|
|
packages that share one repo with the core.
|
|
|
|
Main features are:
|
|
|
|
- Works with [PostgreSQL](https://bun.uptrace.dev/guide/drivers.html#postgresql),
|
|
[MySQL](https://bun.uptrace.dev/guide/drivers.html#mysql) (including MariaDB),
|
|
[SQLite](https://bun.uptrace.dev/guide/drivers.html#sqlite).
|
|
- [Selecting](/example/basic/) into a map, struct, slice of maps/structs/vars.
|
|
- [Bulk inserts](https://bun.uptrace.dev/guide/queries.html#insert).
|
|
- [Bulk updates](https://bun.uptrace.dev/guide/queries.html#update) using common table expressions.
|
|
- [Bulk deletes](https://bun.uptrace.dev/guide/queries.html#delete).
|
|
- [Fixtures](https://bun.uptrace.dev/guide/fixtures.html).
|
|
- [Migrations](https://bun.uptrace.dev/guide/migrations.html).
|
|
- [Soft deletes](https://bun.uptrace.dev/guide/soft-deletes.html).
|
|
|
|
Resources:
|
|
|
|
- [Examples](https://github.com/uptrace/bun/tree/master/example)
|
|
- [Documentation](https://bun.uptrace.dev/)
|
|
- [Reference](https://pkg.go.dev/github.com/uptrace/bun)
|
|
- [Starter kit](https://github.com/go-bun/bun-starter-kit)
|
|
- [RealWorld app](https://github.com/go-bun/bun-realworld-app)
|
|
|
|
<details>
|
|
<summary>github.com/frederikhors/orm-benchmark results</summary>
|
|
|
|
```
|
|
4000 times - Insert
|
|
raw_stmt: 0.38s 94280 ns/op 718 B/op 14 allocs/op
|
|
raw: 0.39s 96719 ns/op 718 B/op 13 allocs/op
|
|
beego_orm: 0.48s 118994 ns/op 2411 B/op 56 allocs/op
|
|
bun: 0.57s 142285 ns/op 918 B/op 12 allocs/op
|
|
pg: 0.58s 145496 ns/op 1235 B/op 12 allocs/op
|
|
gorm: 0.70s 175294 ns/op 6665 B/op 88 allocs/op
|
|
xorm: 0.76s 189533 ns/op 3032 B/op 94 allocs/op
|
|
|
|
4000 times - MultiInsert 100 row
|
|
raw: 4.59s 1147385 ns/op 135155 B/op 916 allocs/op
|
|
raw_stmt: 4.59s 1148137 ns/op 131076 B/op 916 allocs/op
|
|
beego_orm: 5.50s 1375637 ns/op 179962 B/op 2747 allocs/op
|
|
bun: 6.18s 1544648 ns/op 4265 B/op 214 allocs/op
|
|
pg: 7.01s 1753495 ns/op 5039 B/op 114 allocs/op
|
|
gorm: 9.52s 2379219 ns/op 293956 B/op 3729 allocs/op
|
|
xorm: 11.66s 2915478 ns/op 286140 B/op 7422 allocs/op
|
|
|
|
4000 times - Update
|
|
raw_stmt: 0.26s 65781 ns/op 773 B/op 14 allocs/op
|
|
raw: 0.31s 77209 ns/op 757 B/op 13 allocs/op
|
|
beego_orm: 0.43s 107064 ns/op 1802 B/op 47 allocs/op
|
|
bun: 0.56s 139839 ns/op 589 B/op 4 allocs/op
|
|
pg: 0.60s 149608 ns/op 896 B/op 11 allocs/op
|
|
gorm: 0.74s 185970 ns/op 6604 B/op 81 allocs/op
|
|
xorm: 0.81s 203240 ns/op 2994 B/op 119 allocs/op
|
|
|
|
4000 times - Read
|
|
raw: 0.33s 81671 ns/op 2081 B/op 49 allocs/op
|
|
raw_stmt: 0.34s 85847 ns/op 2112 B/op 50 allocs/op
|
|
beego_orm: 0.38s 94777 ns/op 2106 B/op 75 allocs/op
|
|
pg: 0.42s 106148 ns/op 1526 B/op 22 allocs/op
|
|
bun: 0.43s 106904 ns/op 1319 B/op 18 allocs/op
|
|
gorm: 0.65s 162221 ns/op 5240 B/op 108 allocs/op
|
|
xorm: 1.13s 281738 ns/op 8326 B/op 237 allocs/op
|
|
|
|
4000 times - MultiRead limit 100
|
|
raw: 1.52s 380351 ns/op 38356 B/op 1037 allocs/op
|
|
raw_stmt: 1.54s 385541 ns/op 38388 B/op 1038 allocs/op
|
|
pg: 1.86s 465468 ns/op 24045 B/op 631 allocs/op
|
|
bun: 2.58s 645354 ns/op 30009 B/op 1122 allocs/op
|
|
beego_orm: 2.93s 732028 ns/op 55280 B/op 3077 allocs/op
|
|
gorm: 4.97s 1241831 ns/op 71628 B/op 3877 allocs/op
|
|
xorm: doesn't work
|
|
```
|
|
|
|
</details>
|
|
|
|
## Installation
|
|
|
|
```go
|
|
go get github.com/uptrace/bun
|
|
```
|
|
|
|
You also need to install a database/sql driver and the corresponding Bun
|
|
[dialect](https://bun.uptrace.dev/guide/drivers.html).
|
|
|
|
## Quickstart
|
|
|
|
First you need to create a `sql.DB`. Here we are using the
|
|
[sqliteshim](https://pkg.go.dev/github.com/uptrace/bun/driver/sqliteshim) driver which chooses
|
|
between [modernc.org/sqlite](https://modernc.org/sqlite/) and
|
|
[mattn/go-sqlite3](https://github.com/mattn/go-sqlite3) depending on your platform.
|
|
|
|
```go
|
|
import "github.com/uptrace/bun/driver/sqliteshim"
|
|
|
|
sqldb, err := sql.Open(sqliteshim.ShimName, "file::memory:?cache=shared")
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
```
|
|
|
|
And then create a `bun.DB` on top of it using the corresponding SQLite
|
|
[dialect](https://bun.uptrace.dev/guide/drivers.html) that comes with Bun:
|
|
|
|
```go
|
|
import (
|
|
"github.com/uptrace/bun"
|
|
"github.com/uptrace/bun/dialect/sqlitedialect"
|
|
)
|
|
|
|
db := bun.NewDB(sqldb, sqlitedialect.New())
|
|
```
|
|
|
|
Now you are ready to issue some queries:
|
|
|
|
```go
|
|
type User struct {
|
|
ID int64
|
|
Name string
|
|
}
|
|
|
|
user := new(User)
|
|
err := db.NewSelect().
|
|
Model(user).
|
|
Where("name != ?", "").
|
|
OrderExpr("id ASC").
|
|
Limit(1).
|
|
Scan(ctx)
|
|
```
|
|
|
|
The code above is equivalent to:
|
|
|
|
```go
|
|
query := "SELECT id, name FROM users AS user WHERE name != '' ORDER BY id ASC LIMIT 1"
|
|
|
|
rows, err := sqldb.QueryContext(ctx, query)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
if !rows.Next() {
|
|
panic(sql.ErrNoRows)
|
|
}
|
|
|
|
user := new(User)
|
|
if err := db.ScanRow(ctx, rows, user); err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
if err := rows.Err(); err != nil {
|
|
panic(err)
|
|
}
|
|
```
|
|
|
|
## Basic example
|
|
|
|
To provide initial data for our [example](/example/basic/), we will use Bun
|
|
[fixtures](https://bun.uptrace.dev/guide/fixtures.html):
|
|
|
|
```go
|
|
import "github.com/uptrace/bun/dbfixture"
|
|
|
|
// Register models for the fixture.
|
|
db.RegisterModel((*User)(nil), (*Story)(nil))
|
|
|
|
// WithRecreateTables tells Bun to drop existing tables and create new ones.
|
|
fixture := dbfixture.New(db, dbfixture.WithRecreateTables())
|
|
|
|
// Load fixture.yaml which contains data for User and Story models.
|
|
if err := fixture.Load(ctx, os.DirFS("."), "fixture.yaml"); err != nil {
|
|
panic(err)
|
|
}
|
|
```
|
|
|
|
The `fixture.yaml` looks like this:
|
|
|
|
```yaml
|
|
- model: User
|
|
rows:
|
|
- _id: admin
|
|
name: admin
|
|
emails: ['admin1@admin', 'admin2@admin']
|
|
- _id: root
|
|
name: root
|
|
emails: ['root1@root', 'root2@root']
|
|
|
|
- model: Story
|
|
rows:
|
|
- title: Cool story
|
|
author_id: '{{ $.User.admin.ID }}'
|
|
```
|
|
|
|
To select all users:
|
|
|
|
```go
|
|
users := make([]User, 0)
|
|
if err := db.NewSelect().Model(&users).OrderExpr("id ASC").Scan(ctx); err != nil {
|
|
panic(err)
|
|
}
|
|
```
|
|
|
|
To select a single user by id:
|
|
|
|
```go
|
|
user1 := new(User)
|
|
if err := db.NewSelect().Model(user1).Where("id = ?", 1).Scan(ctx); err != nil {
|
|
panic(err)
|
|
}
|
|
```
|
|
|
|
To select a story and the associated author in a single query:
|
|
|
|
```go
|
|
story := new(Story)
|
|
if err := db.NewSelect().
|
|
Model(story).
|
|
Relation("Author").
|
|
Limit(1).
|
|
Scan(ctx); err != nil {
|
|
panic(err)
|
|
}
|
|
```
|
|
|
|
To select a user into a map:
|
|
|
|
```go
|
|
m := make(map[string]interface{})
|
|
if err := db.NewSelect().
|
|
Model((*User)(nil)).
|
|
Limit(1).
|
|
Scan(ctx, &m); err != nil {
|
|
panic(err)
|
|
}
|
|
```
|
|
|
|
To select all users scanning each column into a separate slice:
|
|
|
|
```go
|
|
var ids []int64
|
|
var names []string
|
|
if err := db.NewSelect().
|
|
ColumnExpr("id, name").
|
|
Model((*User)(nil)).
|
|
OrderExpr("id ASC").
|
|
Scan(ctx, &ids, &names); err != nil {
|
|
panic(err)
|
|
}
|
|
```
|
|
|
|
For more details, please consult [docs](https://bun.uptrace.dev/) and check [examples](example).
|
|
|
|
## Contributors
|
|
|
|
Thanks to all the people who already contributed!
|
|
|
|
<a href="https://github.com/uptrace/bun/graphs/contributors">
|
|
<img src="https://contributors-img.web.app/image?repo=uptrace/bun" />
|
|
</a>
|