MigrationManager

Type

Class

Namespace

craft\db

Inherits

craft\db\MigrationManager » yii\base\Component » yii\base\BaseObject

Implements

yii\base\Configurable

Since

3.0.0

MigrationManager manages a set of migrations.

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Public Properties

Property	Description
behaviors	yii\base\Behavior – List of behaviors attached to this component.
db	craft\db\Connection, array, string – The DB connection object or the application component ID of the DB connection
migrationHistory	array – The migration history
migrationNamespace	string, null – The namespace that the migration classes are in
migrationPath	string, null – The path to the migrations directory
migrationTable	string – The migrations table name
newMigrations	array – The list of new migrations
track	string – The migration track (e.g. craft, content, plugin:commerce, etc.)

db

Type

craft\db\Connection, array, string

Default value

'db'

The DB connection object or the application component ID of the DB connection

View source

migrationHistory

Type

array

Default value

null

Access

Read-only

The migration history

View source

migrationNamespace

Type

string, null

Default value

null

The namespace that the migration classes are in

View source

migrationPath

Type

string, null

Default value

null

The path to the migrations directory

View source

migrationTable

Type

string

Default value

\craft\db\Table::MIGRATIONS

The migrations table name

View source

newMigrations

Type

array

Default value

null

Access

Read-only

The list of new migrations

View source

track

Type

string

Default value

null

Since

3.5.0

The migration track (e.g. craft, content, plugin:commerce, etc.)

View source

Public Methods

Method	Description
__call()	Calls the named method which is not a class method.
__clone()	This method is called after the object is created by cloning an existing one.
__construct()	Constructor.
__get()	Returns the value of a component property.
__isset()	Checks if a property is set, i.e. defined and not null.
__set()	Sets the value of a component property.
__unset()	Sets a component property to be null.
addMigrationHistory()	Adds a new migration entry to the history.
attachBehavior()	Attaches a behavior to this component.
attachBehaviors()	Attaches a list of behaviors to the component.
behaviors()	Returns a list of behaviors that this component should behave as.
canGetProperty()	Returns a value indicating whether a property can be read.
canSetProperty()	Returns a value indicating whether a property can be set.
className()	Returns the fully qualified name of this class.
createMigration()	Creates a new migration instance.
detachBehavior()	Detaches a behavior from the component.
detachBehaviors()	Detaches all behaviors from the component.
down()	Downgrades the application by reverting old migrations.
ensureBehaviors()	Makes sure that the behaviors declared in behaviors() are attached to this component.
getBehavior()	Returns the named behavior object.
getBehaviors()	Returns all behaviors attached to this component.
getMigrationHistory()	Returns the migration history.
getNewMigrations()	Returns the migrations that are not applied.
hasEventHandlers()	Returns a value indicating whether there is any handler attached to the named event.
hasMethod()	Returns a value indicating whether a method is defined.
hasProperty()	Returns a value indicating whether a property is defined for this component.
hasRun()	Returns whether a given migration has been applied.
init()	Initializes the object.
migrateDown()	Downgrades with the specified migration.
migrateUp()	Upgrades with the specified migration.
off()	Detaches an existing event handler from this component.
on()	Attaches an event handler to an event.
removeMigrationHistory()	Removes an existing migration from the history.
trigger()	Triggers an event.
truncateHistory()	Truncates the migration history.
up()	Upgrades the application by applying new migrations.

addMigrationHistory()

Adds a new migration entry to the history.

View source

Arguments

• $name (string) – The migration name

Throws

• yii\base\NotSupportedException

createMigration()

Creates a new migration instance.

View source

Arguments

• $name (string) – The migration name

Returns

yii\db\MigrationInterface, yii\db\Migration – The migration instance

Throws

• yii\base\Exception
  if the migration folder doesn't exist

down()

Downgrades the application by reverting old migrations.

View source

Arguments

• $limit (integer) – The number of migrations to be reverted. Defaults to 1, meaning the last applied migration will be reverted. If set to 0, all migrations will be reverted.

Throws

• craft\errors\MigrationException
  on migrate failure

getMigrationHistory()

Returns the migration history.

View source

Arguments

• $limit (integer) – The maximum number of records in the history to be returned. null for "no limit".

Returns

array – The migration history

getNewMigrations()

Returns the migrations that are not applied.

View source

Returns

array – The list of new migrations

hasRun()

Returns whether a given migration has been applied.

View source

Arguments

• $name (string) – The migration name

Returns

boolean – Whether the migration has been applied

init()

Initializes the object.

This method is invoked at the end of the constructor after the object is initialized with the given configuration.

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Throws

• yii\base\InvalidConfigException

migrateDown()

Downgrades with the specified migration.

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Arguments

• $migration (yii\db\Migration, string, yii\db\MigrationInterface) – The name of the migration to revert, or the migration itself

Throws

• yii\base\InvalidConfigException
  if $migration is invalid
• craft\errors\MigrationException
  on migrate failure

migrateUp()

Upgrades with the specified migration.

View source

Arguments

• $migration (yii\db\Migration, string, yii\db\MigrationInterface) – The name of the migration to apply, or the migration itself

Throws

• yii\base\InvalidConfigException
  if $migration is invalid
• craft\errors\MigrationException
  on migrate failure

removeMigrationHistory()

Removes an existing migration from the history.

View source

Arguments

• $name (string) – The migration name

truncateHistory()

Since

3.0.32

Truncates the migration history.

View source

up()

Upgrades the application by applying new migrations.

View source

Arguments

• $limit (integer) – The number of new migrations to be applied. If 0, it means applying all available new migrations.

Throws

• craft\errors\MigrationException
  on migrate failure

Constants

Constant	Description
BASE_MIGRATION	The name of the dummy migration that marks the beginning of the whole migration history.
TRACK_CONTENT
TRACK_CRAFT