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我只是在 Entity framework Plus 中找到自己的脚,以带回具有一组复杂约束/要求的数据。我能够成功使用它,但是在 IncludeFilter() 方法中使用 && 运算符时,我无法返回嵌套/子对象。

我有一个 Company 对象 > 每个都有多个 CommunicationLink 对象 > 每个 CommunicationLink 对象都有一个 Communication 对象。我已经确定添加多个“包含过滤器”可用于复制“或”功能(||),但我无法终生使用 AND 运算符来过滤结果并获取嵌套对象通过。下面是示例代码:

示例 1:

//2 WHERE CLAUSES
var companiesData = _dbContext.Companies
     .IncludeFilter(comp => comp.CommunicationLinks
                .Where(cmli =>
                    string.Equals(cmli.Communication.Action, "PhoneOut")
                )
                .Where(cmli => cmli.UserId == comp.AccountManager) 
                .Select(comm => comm) //I believe this is where the problem lies
      )
      .Where(co =>
           string.Equals(co.Type, "Customer")
           && string.Equals(co.Status, "Active")
           && co.Deleted != 1 
       )
       .OrderBy(c => c.Name);

示例 2:

   //USING && INSTEAD OF 2 WHERE CLAUSES
    var companiesData = _dbContext.Companies
         .IncludeFilter(comp => comp.CommunicationLinks
                    .Where(cmli =>
                        string.Equals(cmli.Communication.Action, "PhoneOut")
                        && cmli.UserId == comp.AccountManager 
                    )
                    .Select(comm => comm) //I believe this is where the problem lies
          )
          .Where(co =>
               string.Equals(co.Type, "Customer")
               && string.Equals(co.Status, "Active")
               && co.Deleted != 1 
           )
           .OrderBy(c => c.Name);

我正在尝试过滤结果以仅返回子 Communication.Action 字段为“PhoneOut”且 Communication.UserId 等于 Company.AccountManager (Id) 中的值的 CommunicationLink 记录。过滤后的结果运行良好,但是 Communication 对象(我希望使用 .Select() 方法获得)对于这些记录返回为 null。

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1 回答 1

1

今天早上在这个问题上挣扎了一段时间后,我解决了它。

//2 WHERE CLAUSES
var companiesData = _dbContext.Companies
     .IncludeFilter(comp => comp.CommunicationLinks
                .Where(cmli =>
                    string.Equals(cmli.Communication.Action, "PhoneOut")
                )
                .Where(cmli => cmli.UserId == comp.AccountManager) 
                .Select(comm => comm.Communication) //forgot Communication!!
      )
      .Where(co =>
           string.Equals(co.Type, "Customer")
           && string.Equals(co.Status, "Active")
           && co.Deleted != 1 
       )
       .OrderBy(c => c.Name);
于 2020-09-04T11:18:23.380 回答