如何將where子句添加到與其他類具有一對多關係的類的字段中？

Question

目標： 獲取到期日期爲< =今天的日期的所有面板。

實體/ DB圖： 控制器：

public ActionResult Index(PanelViewModel panelViewModel) 
    { 
     panelViewModel.Panels = _panelRepository.GetPanels() 
            .Where(p => p.PanelApplicationForms.Count > 0 
              && p.IsPublish 
              && p.PanelApplicationForms != null) 
            .OrderBy(t => t.Title); 

     return View(panelViewModel); 
    } 

Answer 1

嘗試

public ActionResult Index(PanelViewModel panelViewModel) 
{ 
    var proj = _panelRepository.GetPanels() 
           .Where(p => p.PanelApplicationForms.Count > 0 
             && p.PanelApplicationForms 
             .Any(f => f.PanelApplicationFormVersions 
              .Any(v => v.DueDate <= today)) 
             && p.IsPublish 
             && p.PanelApplicationForms != null) 
           .OrderBy(t => t.Title) 
           .Select(p => new { 
              Panel = p, 
              PanelApplicationForms = p.PanelApplicationForms 
              .Where(f => f.PanelApplicationFormVersions 
              .Any(v => v.DueDate <= today)) 
              }) 
           .ToList(); 

    panelViewModel.Panels = proj.Select(p => p.Panel); 

    return View(panelViewModel); 
} 

Answer 2

@Eranga謝謝你的答案及以上評論。我得到它的工作執行以下操作，

控制器：

panelViewModel.Panels = _panelRepository.GetPanels() 
           .Where(p => p.PanelApplicationForms.Count > 0 
                && p.PanelApplicationForms 
                  .Any(f => f.IsPublish 
                    && 
                    f.PanelApplicationFormVersions.OrderByDescending(v => v.VersionNumber). 
                     First().DueDate >= DateTime.Today 
                    && f.PanelApplicationFormVersions.Count > 0 
                  ) 
                && p.PanelApplicationForms != null) 
              .OrderBy(t => t.Title); 

查看：

     @foreach (var panelApplicationFormItem in panelItem.PanelApplicationForms.Where(panelApplicationFormItem => panelApplicationFormItem.IsPublish)) 
         { 
          var panelApplicationFormVersion = panelApplicationFormItem.PanelApplicationFormVersions.OrderByDescending(v => v.VersionNumber).First(); 
          if (panelApplicationFormVersion.DueDate >= DateTime.Today) 
          { 
           <tr> 
            <td> 
             @Html.DisplayFor(modelItem => panelApplicationFormItem.Title) 
            </td> 
            <td class="span2"> 
             @if (panelApplicationFormItem.PanelApplicationFormVersions.Count > 0) 
             { 

              @Html.DisplayFor(modelItem => panelApplicationFormVersion.DueDate) 
             } 
            </td> 
            <td class="span2"> 
             @{ 
              //var isApplicationAlreadyExist = panelApplicationFormVersion.Id.IsApplicationAlreadyExist() 
             } 
             @if (panelApplicationFormVersion != null) 
             { 
              <a href="~/Application/Apply/@panelApplicationFormVersion.Id?versionNumber=@panelApplicationFormVersion.VersionNumber" class="btn">Apply</a> 
             } 
             else 
             { 
              <a href="#" class="btn">Sum</a> 
             @*<p>No versions available to apply</p>*@ 
             } 
            </td> 
           </tr> 
          } 
         }