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Add the ability to create migrations on a per-store level

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Now stores store versions to the database itself.
This commit is contained in:
Dean Herbert
2017-07-27 20:38:35 +09:00
parent cb68f18f47
commit 3a6f3cdd8a
5 changed files with 76 additions and 0 deletions
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33
osu.Game/Beatmaps/BeatmapStore.cs
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@ -17,6 +17,12 @@ namespace osu.Game.Beatmaps
public event Action<BeatmapSetInfo> BeatmapSetAdded;
public event Action<BeatmapSetInfo> BeatmapSetRemoved;
/// <summary>
/// The current version of this store. Used for migrations (see <see cref="PerformMigration(int, int)"/>).
/// The initial version is 1.
/// </summary>
protected override int StoreVersion => 1;
public BeatmapStore(SQLiteConnection connection)
: base(connection)
{
@ -50,6 +56,33 @@ namespace osu.Game.Beatmaps
cleanupPendingDeletions();
}
/// <summary>
/// Perform migrations between two store versions.
/// </summary>
/// <param name="currentVersion">The current store version. This will be zero on a fresh database initialisation.</param>
/// <param name="newVersion">The target version which we are migrating to (equal to the current <see cref="StoreVersion"/>).</param>
protected override void PerformMigration(int currentVersion, int newVersion)
{
base.PerformMigration(currentVersion, newVersion);
while (currentVersion++ < newVersion)
{
switch (currentVersion)
{
case 1:
// initialising from a version before we had versioning (or a fresh install).
// force adding of Protected column (not automatically migrated).
Connection.MigrateTable<BeatmapSetInfo>();
// remove all existing beatmaps.
foreach (var b in Connection.GetAllWithChildren<BeatmapSetInfo>(null, true))
Connection.Delete(b, true);
break;
}
}
}
/// <summary>
/// Add a <see cref="BeatmapSetInfo"/> to the database.
/// </summary>