Yii 2 Migration ¶

1. Migration Creator And Updater
2. Installation
3. Configuration
4. Usage
5. Updating migration
6. Command line parameters
7. Renaming
8. Migrating from v2 or v3 to v4
9. Notes
10. Tests
11. Previous versions

Migration Creator And Updater ¶

Generates migration file based on the existing database table and previous migrations.

Installation ¶

Run console command

composer require bizley/migration

Or add the package to your composer.json file:

{
    "require": {
        "bizley/migration": "^4.0"
    }
}

then run composer update.

Configuration ¶

Add the following in your configuration file (preferably console configuration file):

[
    'controllerMap' => [
        'migration' => [
            'class' => 'bizley\migration\controllers\MigrationController',
        ],
    ],
]

Usage ¶

The following console command are available (assuming you named the controller migration like in the example above):

• List all the tables in the database:

  php yii migration
  

  or

  php yii migration/list
  

• Generate migration to create DB table table_name:

  php yii migration/create table_name
  

• Generate migration to update DB table table_name:

  php yii migration/update table_name
  

To generate migrations for all the tables in the database at once (except the excluded ones) use asterisk (*):

php yii migration/create *
php yii migration/update *

In environments that hijack asterisk (like dockerized env) use "*".
You can generate multiple migrations for many tables at once by separating the names with comma:

php yii migration/create table_name1,table_name2,table_name3

You can provide an asterisk as a part of table name to use all tables matching the pattern:

php yii migration/update prefix_*

Creating multiple table migrations at once forces the proper migration order based on the presence of the foreign keys. When tables are cross-referenced the additional foreign keys migration is generated at the end of default generation.

Updating migration ¶

You can easily generate updating migration for database table by comparing its current schema with the migration history.

1. History of applied migrations is scanned to gather all modifications made to the table.
2. Virtual table schema is prepared and compared with current table schema.
3. Differences are generated as update migration.
4. In case of migration history not keeping information about the table creating migration is generated.

Command line parameters ¶

[1] Remember that with different database types general column schemas may be generated with different length.

MySQL examples: ¶

Column varchar(255)
generalSchema=false: $this->string(255)
generalSchema=true: $this->string()

Column int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY
generalSchema=false: $this->integer(11)->notNull()->append('AUTO_INCREMENT PRIMARY KEY')
generalSchema=true: $this->primaryKey()

When column size is different from DBMS' default it's kept:
Column varchar(45)
generalSchema=false: $this->string(45)
generalSchema=true: $this->string(45)

[2] Here you can place migrations containing actions that cannot be covered by the extractor i.e. when there is a migration setting the RBAC hierarchy with authManager component. Such actions should be kept in separated migration and placed on this list to prevent them from being run during the extraction process.

Renaming ¶

When you rename a table or a column remember to generate appropriate migration manually otherwise this extension will not generate updating migration (in case of the table) or will generate migration with command to drop the original column and add renamed one (in case of the column). This is happening because yii2-migration can only compare two states of the table without the knowledge of how one state turned into another. While the very result of migration renaming the column and the one dropping it and adding another is the same in terms of structure, the latter makes you lose data.

Once you add renaming migration to the history it's being tracked by the extension.

Migrating from v2 or v3 to v4 ¶

See Migrating to version 4.0 section.

Notes ¶

This extension should work with all database types supported in Yii 2 core:

• CUBRID (9.3.x and higher)
• MS SQL Server (2008 and above)
• MySQL (4.1.x and 5.x)
• Oracle
• PostgreSQL (9.x and above)
• SQLite (2/3)

Only history of migrations extending yii\db\Migration class can be properly scanned and only changes applied with default yii\db\Migration methods can be recognised (except for execute(), addCommentOnTable(), and dropCommentFromTable() methods). Changes made to table's data (like insert(), upsert(), delete(), truncate(), etc.) are not tracked.

Updating migrations process requires for methods createTable(), addColumn(), and alterColumn() to provide changes in columns definition in form of an instance of yii\db\ColumnSchemaBuilder (like $this->string() instead of 'varchar(255)').

Tests ¶

Tests for MySQL, PostgreSQL, and SQLite are provided. Database configuration is stored in tests/config.php (you can override it by creating config.local.php file there).
Docker Compose file for setting up the databases is stored in tests/docker.

Previous versions ¶

These versions are not developed anymore but still available for all poor souls that are stuck with EOL PHP. Some of the newest features may not be available there.