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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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@ -140,6 +140,11 @@ namespace FreeSql
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public void Attach(TEntity data) => _db.Attach(data);
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public void Attach(IEnumerable<TEntity> data) => _db.AttachRange(data);
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public IBasicRepository<TEntity> AttachOnlyPrimary(TEntity data)
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{
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_db.AttachOnlyPrimary(data);
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return this;
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}
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public void FlushState() => _dbset.FlushState();
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public TEntity InsertOrUpdate(TEntity entity)
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@ -21,6 +21,12 @@ namespace FreeSql
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/// <param name="entity"></param>
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void Attach(TEntity entity);
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void Attach(IEnumerable<TEntity> entity);
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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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/// <param name="data"></param>
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IBasicRepository<TEntity> AttachOnlyPrimary(TEntity data);
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int Update(TEntity entity);
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int Update(IEnumerable<TEntity> entitys);
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Task<int> UpdateAsync(TEntity entity);
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