dbolve

README

dbolve

Very simple code only migration library for go

Features

• Very simple and readable code (< 200 lines of code)
• Easy to use interface
• Transaction safety for each migration
• Verifies that already applied transactions haven't changed

Usage

go get -u github.com/cinemast/dbolve

Quickstart

examples/main.go

Motivation

Heavily inspired by lopezator/migrator.

I was missing two features:

• Allow to list already applied and pending migrations
• Verification that already applied migrations match the current migration code

Documentation

Index

• type Migration
• type Migrator
  • func NewMigrator(db *sql.DB, migrations []Migration) (*Migrator, error)
  • func (m *Migrator) Applied() []Migration
  • func (m *Migrator) CountApplied() int
  • func (m *Migrator) DryRun() error
  • func (m *Migrator) Migrate() error
  • func (m *Migrator) Pending() []Migration
• type Transaction

Types

type Migration

type Migration struct {
	Name      string
	Code      func(t Transaction) error
	Timestamp string
	// contains filtered or unexported fields
}

Migration struct

type Migrator

type Migrator struct {
	Migrations []Migration
	Log        *log.Logger
	// contains filtered or unexported fields
}

Migrator type

func NewMigrator

func NewMigrator(db *sql.DB, migrations []Migration) (*Migrator, error)

NewMigrator creates a new instance of Migrator

func (*Migrator) Applied

func (m *Migrator) Applied() []Migration

Applied returns a slice of already applied migrations

func (*Migrator) CountApplied

func (m *Migrator) CountApplied() int

CountApplied returns the number of already applied migrations

func (*Migrator) DryRun

func (m *Migrator) DryRun() error

DryRun tries to run the migrations but rollbacks each transaction

func (*Migrator) Migrate

func (m *Migrator) Migrate() error

Migrate run's all missing migrations

func (*Migrator) Pending

func (m *Migrator) Pending() []Migration

Pending returns a slice of not yet applied migrations

type Transaction

type Transaction interface {
	Exec(sql string) error
}

Transaction exposes allowed database operations for migrations