https://github.com/larapulse/migrator
MySQL database migrator
https://github.com/larapulse/migrator
golang migration mysql
Last synced: 8 months ago
JSON representation
MySQL database migrator
- Host: GitHub
- URL: https://github.com/larapulse/migrator
- Owner: larapulse
- License: mit
- Created: 2020-06-27T14:40:29.000Z (over 5 years ago)
- Default Branch: master
- Last Pushed: 2022-07-21T21:48:23.000Z (over 3 years ago)
- Last Synced: 2024-11-07T09:20:20.088Z (about 1 year ago)
- Topics: golang, migration, mysql
- Language: Go
- Homepage:
- Size: 134 KB
- Stars: 25
- Watchers: 2
- Forks: 4
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE.md
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README
# MySQL database migrator
[](https://travis-ci.org/larapulse/migrator)
[](LICENSE.md)
[](https://codecov.io/gh/larapulse/migrator)
[](https://goreportcard.com/report/github.com/larapulse/migrator)
[](https://pkg.go.dev/github.com/larapulse/migrator?tab=doc)
[](https://github.com/avelino/awesome-go)
[](https://github.com/larapulse/migrator/releases)
[](https://www.tickgit.com/browse?repo=github.com/larapulse/migrator)
MySQL database migrator designed to run migrations to your features and manage database schema update with intuitive go code. It is compatible with the latest MySQL v8.
## Installation
To install `migrator` package, you need to install Go and set your Go workspace first.
1. The first need [Go](https://golang.org/) installed (**version 1.13+ is required**), then you can use the below Go command to install `migrator`.
```sh
$ go get -u github.com/larapulse/migrator
```
2. Import it in your code:
```go
import "github.com/larapulse/migrator"
```
## Quick start
Initialize migrator with migration entries:
```go
var migrations = []migrator.Migration{
{
Name: "19700101_0001_create_posts_table",
Up: func() migrator.Schema {
var s migrator.Schema
posts := migrator.Table{Name: "posts"}
posts.UniqueID("id")
posts.Varchar("title", 64)
posts.Text("content", false)
posts.Timestamps()
s.CreateTable(posts)
return s
},
Down: func() migrator.Schema {
var s migrator.Schema
s.DropTableIfExists("posts")
return s
},
},
{
Name: "19700101_0002_create_comments_table",
Up: func() migrator.Schema {
var s migrator.Schema
comments := migrator.Table{Name: "comments"}
comments.UniqueID("id")
comments.UUID("post_id", "", false)
comments.Varchar("name", 64)
comments.Column("email", migrator.String{Default: ""})
comments.Text("content", false)
comments.Timestamps()
comments.Foreign("post_id", "id", "posts", "RESTRICT", "RESTRICT")
s.CreateTable(comments)
return s
},
Down: func() migrator.Schema {
var s migrator.Schema
s.DropTableIfExists("comments")
return s
},
},
{
Name: "19700101_0003_rename_foreign_key",
Up: func() migrator.Schema {
var s migrator.Schema
keyName := migrator.BuildForeignNameOnTable("comments", "post_id")
newKeyName := migrator.BuildForeignNameOnTable("comments", "article_id")
s.AlterTable("comments", migrator.TableCommands{
migrator.DropForeignCommand(keyName),
migrator.DropIndexCommand(keyName),
migrator.RenameColumnCommand{"post_id", "article_id"},
migrator.AddIndexCommand{newKeyName, []string{"article_id"}},
migrator.AddForeignCommand{migrator.Foreign{
Key: newKeyName,
Column: "article_id",
Reference: "id",
On: "posts",
}},
})
return s
},
Down: func() migrator.Schema {
var s migrator.Schema
keyName := migrator.BuildForeignNameOnTable("comments", "article_id")
newKeyName := migrator.BuildForeignNameOnTable("comments", "post_id")
s.AlterTable("comments", migrator.TableCommands{
migrator.DropForeignCommand(keyName),
migrator.DropIndexCommand(keyName),
migrator.RenameColumnCommand{"article_id", "post_id"},
migrator.AddIndexCommand{newKeyName, []string{"post_id"}},
migrator.AddForeignCommand{migrator.Foreign{
Key: newKeyName,
Column: "post_id",
Reference: "id",
On: "posts",
}},
})
return s
},
}
m := migrator.Migrator{Pool: migrations}
migrated, err = m.Migrate(db)
if err != nil {
log.Errorf("Could not migrate: %v", err)
os.Exit(1)
}
if len(migrated) == 0 {
log.Print("Nothing were migrated.")
}
for _, m := range migrated {
log.Printf("Migration: %s was migrated ✅", m)
}
log.Print("Migration did run successfully")
```
After the first migration run, `migrations` table will be created:
```
+----+-------------------------------------+-------+----------------------------+
| id | name | batch | applied_at |
+----+-------------------------------------+-------+----------------------------+
| 1 | 19700101_0001_create_posts_table | 1 | 2020-06-27 00:00:00.000000 |
| 2 | 19700101_0002_create_comments_table | 1 | 2020-06-27 00:00:00.000000 |
| 3 | 19700101_0003_rename_foreign_key | 1 | 2020-06-27 00:00:00.000000 |
+----+-------------------------------------+-------+----------------------------+
```
If you want to use another name for migration table, change it `Migrator` before running migrations:
```go
m := migrator.Migrator{TableName: "_my_app_migrations"}
```
### Transactional migration
In case you have multiple commands within one migration and you want to be sure it is migrated properly, you might enable transactional execution per migration:
```go
var migration = migrator.Migration{
Name: "19700101_0001_create_posts_and_users_tables",
Up: func() migrator.Schema {
var s migrator.Schema
posts := migrator.Table{Name: "posts"}
posts.UniqueID("id")
posts.Timestamps()
users := migrator.Table{Name: "users"}
users.UniqueID("id")
users.Timestamps()
s.CreateTable(posts)
s.CreateTable(users)
return s
},
Down: func() migrator.Schema {
var s migrator.Schema
s.DropTableIfExists("users")
s.DropTableIfExists("posts")
return s
},
Transaction: true,
}
```
### Rollback and revert
In case you need to revert your deploy and DB, you can revert last migrated batch:
```go
m := migrator.Migrator{Pool: migrations}
reverted, err := m.Rollback(db)
if err != nil {
log.Errorf("Could not roll back migrations: %v", err)
os.Exit(1)
}
if len(reverted) == 0 {
log.Print("Nothing were rolled back.")
}
for _, m := range reverted {
log.Printf("Migration: %s was rolled back ✅", m)
}
```
To revert all migrated items back, you have to call `Revert()` on your `migrator`:
```go
m := migrator.Migrator{Pool: migrations}
reverted, err := m.Revert(db)
```
## Customize queries
You may add any column definition to the database on your own, just be sure you implement `columnType` interface:
```go
type customType string
func (ct customType) buildRow() string {
return string(ct)
}
posts := migrator.Table{Name: "posts"}
posts.UniqueID("id")
posts.Column("data", customType("json not null"))
posts.Timestamps()
```
The same logic is for adding custom commands to the Schema to be migrated or reverted, just be sure you implement `command` interface:
```go
type customCommand string
func (cc customCommand) toSQL() string {
return string(cc)
}
var s migrator.Schema
c := customCommand("DROP PROCEDURE abc")
s.CustomCommand(c)
```