如何在原始查询中使用实体框架事务？

Question

我正在使用实体框架，但使用原始查询进行操作。我的操作如下：

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1. 检查rec\xc4\xb1rd 是否存在且具有integration_id
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2. 退出则删除记录
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3. 插入新记录
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所以我正在使用交易

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using (var transaction = await _context.Database.BeginTransactionAsync())\n{ \n        var isExist = await IsExist(id);\n\n        if (isExist)\n        {\n              var deleteQuery = "delete from ....";\n              await _context.Database.ExecuteSqlRawAsync(deleteQuery);\n        }\n\n        var insertQuery = "insert into ...";\n        await _context.Database.ExecuteSqlRawAsync(insertQuery);\n}\n

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如果插入操作失败，删除的记录是否回滚？

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Answer 1

UPD：https://learn.microsoft.com/en-us/ef/core/ saving/transactions#controlling-transactions

如果任一命令失败，事务将在处理时自动回滚

所以，我下面的代码在 catch 方面可能有点过分了，但 Commit 仍然是必要的:)

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我认为使用事务的正确方法如下：

using (var transaction = await _context.Database.BeginTransactionAsync())
{
    try
    {
        var isExist = await IsExist(id);

        if (isExist)
        {
            var deleteQuery = "delete from ....";
            await _context.Database.ExecuteSqlRawAsync(deleteQuery);
        }

        var insertQuery = "insert into ...";
        await _context.Database.ExecuteSqlRawAsync(insertQuery);

        // there we tell DB to finish the transaction,
        // mark all changes as permanent and release all locks
        transaction.Commit();
    }
    catch (Exception ex)
    {
        // there we tell DB to discard all changes
        // made by this transaction that may be discarded
        transaction.Rollback();
        // log error
    }
}

但我BeginTransaction*Async*个人以前从未使用过。