Storm

Storm is a wrapper and simple ORM around BoltDB. The goal of this project is to provide a simple way to save any object in BoltDB and to easily retrieve it.

Getting Started

go get -u github.com/asdine/storm

Import Storm

import "github.com/asdine/storm"

Open a database

Quick way of opening a database

db, err := storm.Open("my.db")

defer db.Close()

By default, Storm opens a database with the mode 0600 and a timeout of one second. You can change this behavior by using OpenWithOptions

db, err := storm.OpenWithOptions("my.db", 0600, &bolt.Options{Timeout: 1 * time.Second})

Simple ORM

Declare your structures

type User struct {
  ID int // primary key
  Group string `storm:"index"` // this field will be indexed
  Email string `storm:"unique"` // this field will be indexed with a unique constraint
  Name string // this field will not be indexed
}

The primary key can be of any type as long as it is not a zero value. Storm will search for the tag id, if not present Storm will search for a field named ID.

type User struct {
  ThePrimaryKey string `storm:"id"`// primary key
  Group string `storm:"index"` // this field will be indexed
  Email string `storm:"unique"` // this field will be indexed with a unique constraint
  Name string // this field will not be indexed
}

Storm handles tags in nested structures with the inline tag

type Base struct {
  Ident bson.ObjectId `storm:"id"`
}

type User struct {
	Base      `storm:"inline"`
	Group     string `storm:"index"`
	Email     string `storm:"unique"`
	Name      string
	CreatedAt time.Time `storm:"index"`
}

Save your object

user := User{
  ID: 10,
  Group: "staff",
  Email: "[email protected]",
  Name: "John",
  CreatedAt: time.Now(),
}

err := db.Save(&user)
// err == nil

user.ID++
err = db.Save(&user)
// err == "already exists"

That's it.

Save creates or updates all the required indexes and buckets, checks the unique constraints and saves the object to the store.

Fetch your object

Only indexed fields can be used to find a record

var user User
err := db.One("Email", "[email protected]", &user)
// err == nil

err = db.One("Name", "John", &user)
// err == "not found"

Fetch multiple objects

var users []User
err := db.Find("Group", "staff", &users)

Fetch all objects

var users []User
err := db.All(&users)

Fetch all objects sorted by index

var users []User
err := db.AllByIndex("CreatedAt", &users)

Remove an object

err := db.Remove(&user)

Initialize buckets and indexes before saving an object

err := db.Init(&User{})

Useful when starting your application

Simple Key/Value store

Storm can be used as a simple, robust, key/value store that can store anything. The key and the value can be of any type as long as the key is not a zero value.

Saving data :

db.Set("logs", time.Now(), "I'm eating my breakfast man")
db.Set("sessions", bson.NewObjectId(), &someUser)
db.Set("weird storage", "754-3010", map[string]interface{}{
  "hair": "blonde",
  "likes": []string{"cheese", "star wars"},
})

Fetching data :

user := User{}
db.Get("sessions", someObjectId, &user)

var details map[string]interface{}
db.Get("weird storage", "754-3010", &details)

db.Get("sessions", someObjectId, &details)

Deleting data :

db.Delete("sessions", someObjectId)
db.Delete("weird storage", "754-3010")

BoltDB

BoltDB is still easily accessible and can be used as usual

db.Bolt.View(func(tx *bolt.Tx) error {
  bucket := tx.Bucket([]byte("my bucket"))
  val := bucket.Get([]byte("any id"))
  fmt.Println(string(val))
  return nil
})

TODO

Improve documentation / comments
Btree indexes and more
Order
Limit
Offset

License

MIT

Author

Asdine El Hrychy

bep / storm Goto Github PK

storm's Introduction