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## v0.9.16
- 增加 BaseRepository.AttachOnlyPrimary 方法,只附加实体的主键值; > 在更新前使用可实现不查询数据库再更新、也可以实现更新时不更新值为 null 的字段 ```csharp class T { public int id { get; set; } public string name { get; set; } public string other { get; set; } } var item = new T { id = 1, name = "xx" }; fsql.GetRepository<T>().AttachOnlyPrimary(item).Update(item); //只更新 name ``` - 修复 Lambda 表达式中 DateTime.Now.ToString("yyyyMMdd") 不能直接执行的 bug;
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@ -129,6 +129,17 @@ namespace FreeSql
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/// <param name="data"></param>
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public void Attach<TEntity>(TEntity data) where TEntity : class => this.Set<TEntity>().Attach(data);
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public void AttachRange<TEntity>(IEnumerable<TEntity> data) where TEntity : class => this.Set<TEntity>().AttachRange(data);
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/// <summary>
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/// 附加实体,并且只附加主键值,可用于不更新属性值为null或默认值的字段
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/// </summary>
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/// <typeparam name="TEntity"></typeparam>
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/// <param name="data"></param>
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public DbContext AttachOnlyPrimary<TEntity>(TEntity data) where TEntity : class
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{
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this.Set<TEntity>().AttachOnlyPrimary(data);
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return this;
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}
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#endregion
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#region Queue Action
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