gormigrate

Overview ¶

Package gormigrate is a migration helper for Gorm (http://jinzhu.me/gorm/). Gorm already have useful migrate functions (http://jinzhu.me/gorm/database.html#migration), just misses proper schema versioning and rollback cababilities.

Example:

    package main

    import (
	       "log"

	       "github.com/go-gormigrate/gormigrate"
	       "github.com/jinzhu/gorm"
	       _ "github.com/jinzhu/gorm/dialects/sqlite"
    )

    type Person struct {
	        gorm.Model
         Name string
    }

    type Pet struct {
	        gorm.Model
	        Name     string
	        PersonID int
    }

    func main() {
	        db, err := gorm.Open("sqlite3", "mydb.sqlite3")
	        if err != nil {
		        log.Fatal(err)
	        }
	        if err = db.DB().Ping(); err != nil {
	    	    log.Fatal(err)
        	}

	        db.LogMode(true)

        	m := gormigrate.New(db, gormigrate.DefaultOptions, []*gormigrate.Migration{
	        	{
	        		ID: "201608301400",
	        		Migrate: func(tx *gorm.DB) error {
			        	return tx.AutoMigrate(&Person{}).Error
        			},
		        	Rollback: func(tx *gorm.DB) error {
				        return tx.DropTable("people").Error
			        },
        		},
	        	{
		        	ID: "201608301430",
		        	Migrate: func(tx *gorm.DB) error {
			        	return tx.AutoMigrate(&Pet{}).Error
		        	},
			        Rollback: func(tx *gorm.DB) error {
				        return tx.DropTable("pets").Error
		        	},
	        	},
	        })

	        err = m.Migrate()
        	if err == nil {
        		log.Printf("Migration did run successfully")
        	} else {
	        	log.Printf("Could not migrate: %v", err)
        	}
    }