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DefaultConstraintNameConvention.cs
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DefaultConstraintNameConvention.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.Text;
using FluentMigrator.Expressions;
using FluentMigrator.Model;
namespace FluentMigrator.Runner.Conventions
{
/// <summary>
/// The default implementation of a <see cref="IConstraintConvention"/>
/// </summary>
/// <remarks>
/// It sets the default name of a constraint.
/// </remarks>
public class DefaultConstraintNameConvention : IConstraintConvention
{
/// <inheritdoc />
public IConstraintExpression Apply(IConstraintExpression expression)
{
if (string.IsNullOrEmpty(expression.Constraint.ConstraintName))
{
expression.Constraint.ConstraintName = GetConstraintName(expression.Constraint);
}
return expression;
}
private static string GetConstraintName(ConstraintDefinition expression)
{
var sb = new StringBuilder();
sb.Append(expression.IsPrimaryKeyConstraint ? "PK_" : "UC_");
sb.Append(expression.TableName);
foreach (var column in expression.Columns)
{
sb.Append('_').Append(column);
}
return sb.ToString();
}
}
}