# RoomDatabase.MigrationContainer

added in[version 1.1.0](https://developer.android.com/topic/libraries/support-library/revisions)  
belongs to Maven artifact android.arch.persistence.room:runtime:1.1.0-beta2  
Summary:[Ctors](https://developer.android.com/reference/android/arch/persistence/room/RoomDatabase.MigrationContainer#pubctors)\|[Methods](https://developer.android.com/reference/android/arch/persistence/room/RoomDatabase.MigrationContainer#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/android/arch/persistence/room/RoomDatabase.MigrationContainer#inhmethods)  

# RoomDatabase.MigrationContainer

| The`android.arch`Architecture Components packages are no longer maintained. They have been superseded by the corresponding[androidx.\*](https://developer.android.com/jetpack/androidx/migrate)packages. See[androidx.room.RoomDatabase.MigrationContainer](https://developer.android.com/reference/androidx/room/RoomDatabase.MigrationContainer)instead.

`
public
static


class
RoomDatabase.MigrationContainer
`  
`

extends Object


``


`

|---|---------------------------------------------------------------|
| java.lang.Object                                                 ||
| ↳ | android.arch.persistence.room.RoomDatabase.MigrationContainer |

<br />

*** ** * ** ***

A container to hold migrations. It also allows querying its contents to find migrations between two versions.

## Summary

|                                                                                ### Public constructors                                                                                ||
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---|
| ` `[RoomDatabase.MigrationContainer](https://developer.android.com/reference/android/arch/persistence/room/RoomDatabase.MigrationContainer#RoomDatabase.MigrationContainer())`() ` |

|                                                                                                                                                                                                                                             ### Public methods                                                                                                                                                                                                                                             ||
|-------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` void`                                                                                                           | ` `[addMigrations](https://developer.android.com/reference/android/arch/persistence/room/RoomDatabase.MigrationContainer#addMigrations(android.arch.persistence.room.migration.Migration...))`(`[Migration...](https://developer.android.com/reference/android/arch/persistence/room/migration/Migration)` migrations) ` Adds the given migrations to the list of available migrations. |
| ` List<`[Migration](https://developer.android.com/reference/android/arch/persistence/room/migration/Migration)`>` | ` `[findMigrationPath](https://developer.android.com/reference/android/arch/persistence/room/RoomDatabase.MigrationContainer#findMigrationPath(int, int))`(int start, int end) ` Finds the list of migrations that should be run to move from`start`version to`end`version.                                                                                                             |

| ### Inherited methods |
|-----------------------|---|
| From class` java.lang.Object ` |-------------------|-------------------------------| | ` Object`         | ` clone() `                   | | ` boolean`        | ` equals(Object arg0) `       | | ` void`           | ` finalize() `                | | ` final Class<?>` | ` getClass() `                | | ` int`            | ` hashCode() `                | | ` final void`     | ` notify() `                  | | ` final void`     | ` notifyAll() `               | | ` String`         | ` toString() `                | | ` final void`     | ` wait(long arg0, int arg1) ` | | ` final void`     | ` wait(long arg0) `           | | ` final void`     | ` wait() `                    | ||

## Public constructors

### RoomDatabase.MigrationContainer

added in[version 1.1.0](https://developer.android.com/topic/libraries/support-library/revisions)  

```
RoomDatabase.MigrationContainer ()
```

<br />

<br />

## Public methods

### addMigrations

added in[version 1.1.0](https://developer.android.com/topic/libraries/support-library/revisions)  

```
void addMigrations (Migration... migrations)
```

Adds the given migrations to the list of available migrations. If 2 migrations have the same start-end versions, the latter migration overrides the previous one.

<br />

|                           Parameters                            ||
|--------------|---------------------------------------------------|
| `migrations` | `Migration`: List of available migrations. <br /> |

### findMigrationPath

added in[version 1.1.0](https://developer.android.com/topic/libraries/support-library/revisions)  

```
List<Migration> findMigrationPath (int start, 
                int end)
```

Finds the list of migrations that should be run to move from`start`version to`end`version.

<br />

|                     Parameters                      ||
|---------|--------------------------------------------|
| `start` | `int`: The current database version <br /> |
| `end`   | `int`: The target database version <br />  |

|                                                                                                                                                                                Returns                                                                                                                                                                                 ||
|------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `List<`[Migration](https://developer.android.com/reference/android/arch/persistence/room/migration/Migration)`>` | An ordered list of[Migration](https://developer.android.com/reference/android/arch/persistence/room/migration/Migration)objects that should be run to migrate between the given versions. If a migration path cannot be found, returns`null`. <br /> |

-

  ## Annotations

  - [ColumnInfo](https://developer.android.com/reference/android/arch/persistence/room/ColumnInfo)
  - [ColumnInfo.Collate](https://developer.android.com/reference/android/arch/persistence/room/ColumnInfo.Collate)
  - [ColumnInfo.SQLiteTypeAffinity](https://developer.android.com/reference/android/arch/persistence/room/ColumnInfo.SQLiteTypeAffinity)
  - [Dao](https://developer.android.com/reference/android/arch/persistence/room/Dao)
  - [Database](https://developer.android.com/reference/android/arch/persistence/room/Database)
  - [Delete](https://developer.android.com/reference/android/arch/persistence/room/Delete)
  - [Embedded](https://developer.android.com/reference/android/arch/persistence/room/Embedded)
  - [Entity](https://developer.android.com/reference/android/arch/persistence/room/Entity)
  - [ForeignKey](https://developer.android.com/reference/android/arch/persistence/room/ForeignKey)
  - [ForeignKey.Action](https://developer.android.com/reference/android/arch/persistence/room/ForeignKey.Action)
  - [Ignore](https://developer.android.com/reference/android/arch/persistence/room/Ignore)
  - [Index](https://developer.android.com/reference/android/arch/persistence/room)
  - [Insert](https://developer.android.com/reference/android/arch/persistence/room/Insert)
  - [OnConflictStrategy](https://developer.android.com/reference/android/arch/persistence/room/OnConflictStrategy)
  - [PrimaryKey](https://developer.android.com/reference/android/arch/persistence/room/PrimaryKey)
  - [Query](https://developer.android.com/reference/android/arch/persistence/room/Query)
  - [RawQuery](https://developer.android.com/reference/android/arch/persistence/room/RawQuery)
  - [Relation](https://developer.android.com/reference/android/arch/persistence/room/Relation)
  - [SkipQueryVerification](https://developer.android.com/reference/android/arch/persistence/room/SkipQueryVerification)
  - [Transaction](https://developer.android.com/reference/android/arch/persistence/room/Transaction)
  - [TypeConverter](https://developer.android.com/reference/android/arch/persistence/room/TypeConverter)
  - [TypeConverters](https://developer.android.com/reference/android/arch/persistence/room/TypeConverters)
  - [Update](https://developer.android.com/reference/android/arch/persistence/room/Update)
-

  ## Classes

  - [DatabaseConfiguration](https://developer.android.com/reference/android/arch/persistence/room/DatabaseConfiguration)
  - [InvalidationTracker](https://developer.android.com/reference/android/arch/persistence/room/InvalidationTracker)
  - [InvalidationTracker.Observer](https://developer.android.com/reference/android/arch/persistence/room/InvalidationTracker.Observer)
  - [Room](https://developer.android.com/reference/android/arch/persistence/room/Room)
  - [RoomDatabase](https://developer.android.com/reference/android/arch/persistence/room/RoomDatabase)
  - [RoomDatabase.Builder](https://developer.android.com/reference/android/arch/persistence/room/RoomDatabase.Builder)
  - [RoomDatabase.Callback](https://developer.android.com/reference/android/arch/persistence/room/RoomDatabase.Callback)
  - [RoomDatabase.MigrationContainer](https://developer.android.com/reference/android/arch/persistence/room/RoomDatabase.MigrationContainer)
  - [RoomWarnings](https://developer.android.com/reference/android/arch/persistence/room/RoomWarnings)
  - [RxRoom](https://developer.android.com/reference/android/arch/persistence/room/RxRoom)
-

  ## Enums

  - [RoomDatabase.JournalMode](https://developer.android.com/reference/android/arch/persistence/room/RoomDatabase.JournalMode)
-

  ## Exceptions

  - [EmptyResultSetException](https://developer.android.com/reference/android/arch/persistence/room/EmptyResultSetException)