Entity Framework 6 迁移是否可以包含围绕脚本的事务? [英] Can Entity Framework 6 migrations include a transaction around scripts?

问题描述

很简单的问题，我在实体框架6中使用迁移，和命令一样

Very simple question, i am using migrations in entity framework 6, and like the command

update-database -script

但是有没有一种方法可以生成脚本但将其与事务包装在一起?

But is there a way of generating the script but have it wrapped with a transaction?

问题是如果脚本失败，我必须取消它

Problem is that if the script fails, i have to unpick it

推荐答案

这是我只在发布模式下用来生成脚本的:

This is what I'm using only on release mode to generate the scripts:

public class MigrationScriptBuilder : SqlServerMigrationSqlGenerator
{
#if !DEBUG
    protected override void Generate(SqlOperation sqlOperation)
    {
        Statement("GO");

        base.Generate(sqlOperation);

        Statement("GO");
    }

    public override IEnumerable<MigrationStatement> Generate(IEnumerable<MigrationOperation> migrationOperations, string providerManifestToken)
    {
        yield return new MigrationStatement {Sql = "BEGIN TRAN"};

        foreach (var migrationStatement in base.Generate(migrationOperations, providerManifestToken))
        {
            yield return migrationStatement;
        }

        yield return new MigrationStatement {Sql = "COMMIT TRAN"};
    }
#endif
}

您应该在 DatabaseMigrationsConfiguration 中连接它.示例:

You should wire that in your DatabaseMigrationsConfiguration. Example:

public sealed class DatabaseMigrationsConfiguration : DbMigrationsConfiguration<DatabaseContext>
{
    public DatabaseMigrationsConfiguration()
    {
        SetSqlGenerator("System.Data.SqlClient", new MigrationScriptBuilder());
    }
}

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