/
AutoReversingMigration.cs
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/
AutoReversingMigration.cs
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#region License
//
// Copyright (c) 2007-2024, Fluent Migrator Project
//
// Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#endregion
using System.Linq;
using FluentMigrator.Infrastructure;
namespace FluentMigrator
{
/// <summary>
/// A migration base class that will automatically generate the down expressions
/// </summary>
/// <remarks>
/// This only works for some expressions like CREATE TABLE, but not for DROP TABLE.
/// </remarks>
public abstract class AutoReversingMigration : MigrationBase
{
/// <inheritdoc />
public sealed override void Down()
{
}
/// <inheritdoc />
public override void GetDownExpressions(IMigrationContext context)
{
GetUpExpressions(context);
context.Expressions = context.Expressions.Select(e => e.Reverse()).Reverse().ToList();
}
}
}