mirror of
https://github.com/Sonarr/Sonarr
synced 2024-12-27 10:17:47 +00:00
119 lines
4.1 KiB
C#
119 lines
4.1 KiB
C#
#region License
|
|
|
|
//The contents of this file are subject to the Mozilla Public License
|
|
//Version 1.1 (the "License"); you may not use this file except in
|
|
//compliance with the License. You may obtain a copy of the License at
|
|
//http://www.mozilla.org/MPL/
|
|
//Software distributed under the License is distributed on an "AS IS"
|
|
//basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
|
|
//License for the specific language governing rights and limitations
|
|
//under the License.
|
|
|
|
#endregion
|
|
|
|
namespace Migrator.Framework
|
|
{
|
|
/// <summary>
|
|
/// A migration is a group of transformation applied to the database schema
|
|
/// (or sometimes data) to port the database from one version to another.
|
|
/// The <c>Up()</c> method must apply the modifications (eg.: create a table)
|
|
/// and the <c>Down()</c> method must revert, or rollback the modifications
|
|
/// (eg.: delete a table).
|
|
/// <para>
|
|
/// Each migration must be decorated with the <c>[Migration(0)]</c> attribute.
|
|
/// Each migration number (0) must be unique, or else a
|
|
/// <c>DuplicatedVersionException</c> will be trown.
|
|
/// </para>
|
|
/// <para>
|
|
/// All migrations are executed inside a transaction. If an exception is
|
|
/// thrown, the transaction will be rolledback and transformations wont be
|
|
/// applied.
|
|
/// </para>
|
|
/// <para>
|
|
/// It is best to keep a limited number of transformation inside a migration
|
|
/// so you can easely move from one version of to another with fine grain
|
|
/// modifications.
|
|
/// You should give meaningful name to the migration class and prepend the
|
|
/// migration number to the filename so they keep ordered, eg.:
|
|
/// <c>002_CreateTableTest.cs</c>.
|
|
/// </para>
|
|
/// <para>
|
|
/// Use the <c>Database</c> property to apply transformation and the
|
|
/// <c>Logger</c> property to output informations in the console (or other).
|
|
/// For more details on transformations see
|
|
/// <see cref="ITransformationProvider">ITransformationProvider</see>.
|
|
/// </para>
|
|
/// </summary>
|
|
/// <example>
|
|
/// The following migration creates a new Customer table.
|
|
/// (File <c>003_AddCustomerTable.cs</c>)
|
|
/// <code>
|
|
/// [Migration(3)]
|
|
/// public class AddCustomerTable : Migration
|
|
/// {
|
|
/// public override void Up()
|
|
/// {
|
|
/// Database.AddTable("Customer",
|
|
/// new Column("Name", typeof(string), 50),
|
|
/// new Column("Address", typeof(string), 100)
|
|
/// );
|
|
/// }
|
|
/// public override void Down()
|
|
/// {
|
|
/// Database.RemoveTable("Customer");
|
|
/// }
|
|
/// }
|
|
/// </code>
|
|
/// </example>
|
|
public abstract class Migration : IMigration
|
|
{
|
|
private ITransformationProvider _transformationProvider;
|
|
|
|
public string Name
|
|
{
|
|
get { return StringUtils.ToHumanName(GetType().Name); }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Defines tranformations to port the database to the current version.
|
|
/// </summary>
|
|
public abstract void Up();
|
|
|
|
/// <summary>
|
|
/// This is run after the Up transaction has been committed
|
|
/// </summary>
|
|
public virtual void AfterUp()
|
|
{
|
|
}
|
|
|
|
/// <summary>
|
|
/// Defines transformations to revert things done in <c>Up</c>.
|
|
/// </summary>
|
|
public abstract void Down();
|
|
|
|
/// <summary>
|
|
/// This is run after the Down transaction has been committed
|
|
/// </summary>
|
|
public virtual void AfterDown()
|
|
{
|
|
}
|
|
|
|
/// <summary>
|
|
/// Represents the database.
|
|
/// <see cref="ITransformationProvider"></see>.
|
|
/// </summary>
|
|
/// <seealso cref="ITransformationProvider">Migration.Framework.ITransformationProvider</seealso>
|
|
public ITransformationProvider Database
|
|
{
|
|
get { return _transformationProvider; }
|
|
set { _transformationProvider = value; }
|
|
}
|
|
|
|
/// <summary>
|
|
/// This gets called once on the first migration object.
|
|
/// </summary>
|
|
public virtual void InitializeOnce(string[] args)
|
|
{
|
|
}
|
|
}
|
|
}
|