private List <MethodInfo> GetMethods(DataMigration migration, int version, int endVersion = 0, bool isUp = true)
{
var methodHeader = isUp ? "Up" : "Down";
var methods = migration
.GetType()
.GetRuntimeMethods()
.Where(
m =>
m.IsPublic && m.ReturnType == typeof(void) &&
m.Name.StartsWith(methodHeader, StringComparison.OrdinalIgnoreCase))
.Select(
m =>
new MethodInfo
{
Version = Convert.ToInt32(m.Name.Substring(methodHeader.Length)) + 1,
Method = builder => m.Invoke(migration, new[] { builder })
})
.Where(method => method.Version > version && method.Version < endVersion);
if (isUp)
{
return(methods.OrderBy(method => method.Version).ToList());
}
return(methods.OrderByDescending(method => method.Version).ToList());
}
private IEnumerable <OperationsMigration> Downgrade(DataMigration migration, Migration dbMigration, int version)
{
var methods = GetMethods(migration, version, dbMigration.Version, false);
foreach (var method in methods)
{
yield return(CreateOperationsMigration(dbMigration.Id, method.Version, method.Method));
}
if (version == -1)
{
yield return(CreateOperationsMigration(dbMigration.Id, 0, migration.Destroy));
}
}
private IEnumerable <OperationsMigration> Upgrade(DataMigration migration, Migration dbMigration, int version)
{
var id = migration.GetType().FullName;
if (dbMigration == null)
{
yield return(CreateOperationsMigration(id, 1, migration.Create));
}
var methods = GetMethods(migration, dbMigration?.Version ?? 0, version);
foreach (var method in methods)
{
yield return(CreateOperationsMigration(id, method.Version, method.Method));
}
}
private void InitDataMigration(DataMigration migration)
{
migration.Logger = Logger;
}
