在CAML查询中插入WHERE子句-使用SharePoint、SPServices、JavaScript和jQuery

我正试图在CAML查询中插入WHERE子句，以过滤日期列中的NULL（我希望返回在Assign date列中没有日期的所有行）

这是一个SharePoint列表。代码使用SPServices、jQuery和JavaScript

我花了相当长的时间来实现这一点——我在做这种集成方面的经验很少，在使用CAML方面的经验更少

这是代码的CAML查询段：

function loadPrioritizedList() {
    $("#tasksUL").empty();
    $().SPServices({
        operation: "GetListItems",    
        webURL: myURL,
        listName: targetListName,
        CAMLViewFields: "<ViewFields><FieldRef Name='Priority_x0020_Number' /><FieldRef Name='Edit_x0020_Link' /><FieldRef Name='Priority' /><FieldRef Name='Top_x0020_Item_x003f_' /><FieldRef Name='Purpose' /><FieldRef Name='Item_x002d_Task_x0020_Order' /><FieldRef Name='Mode' /><FieldRef Name='Work_x0020_Status' /><FieldRef Name='DueDate' /><FieldRef Name='Task_x0020_Type' /><FieldRef Name='DAK_x0020_Date' /><FieldRef Name='DAK_x0020_No' /><FieldRef Name='AssignedTo' /><FieldRef Name='Money_x0020_Estimate' /><FieldRef Name='ItemStatus' /><FieldRef Name='Assign_x0020_Date' /></ViewFields>",
        CAMLQuery: '<Query>' +
        '<OrderBy>' +
        '<FieldRef Name="Priority_x0020_Number" />' +
        '</OrderBy>' +
        '</Query>', 
        CAMLRowLimit: listrowlimit,  
        completefunc: function (xData, Status) {
            $(xData.responseXML).SPFilterNode("z:row").each(function() {
                var tdHtml = "<tr class='sortable_row' id=" + $(this).attr("ows_ID") + ">";
                tdHtml = tdHtml + "<td style=\"width:60px;\">" + PriorityFormat($(this).attr("ows_Priority_x0020_Number"));  + "</td>";
                tdHtml = tdHtml + '<td style=\"width:49px;\"><a href=\"'+($(this).attr("ows_Edit_x0020_Link")).split(", ")[1] + '\">' + ($(this).attr("ows_Edit_x0020_Link")).split(", ")[1] + '</a></td>';
                tdHtml = tdHtml + "<td style=\"width:83px;\">" + $(this).attr("ows_Priority") + "</td>";
                tdHtml = tdHtml + "<td style=\"width:63px;\">" + TopItem($(this).attr("ows_Top_x0020_Item_x003f_")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:300px;\">" + StringChk($(this).attr("ows_Purpose")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:125px;\">" + StringChk($(this).attr("ows_Item_x002d_Task_x0020_Order")) + "</td>";                     
                tdHtml = tdHtml + "<td style=\"width:40px;\">" + StringChk($(this).attr("ows_Mode")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:75px;\">" + StringChk($(this).attr("ows_Task_x0020_Type")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:150px;\">" + StringChk($(this).attr("ows_Work_x0020_Status")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:100px;\">" + FormatDate($(this).attr("ows_DueDate")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:100px;\">" + FormatDate($(this).attr("ows_DAK_x0020_Date")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:100px;\">" + StringChk($(this).attr("ows_DAK_x0020_No")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:300px;\">" + StringChk($(this).attr("ows_AssignedTo")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:125px;\">" + $(this).attr("ows_Money_x0020_Estimate") + "</td>";
                tdHtml = tdHtml + "<td style=\"width:75px;\">" + StringChk($(this).attr("ows_ItemStatus")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:100px;\">" + FormatDate($(this).attr("ows_Assign_x0020_Date")) + "</td>";
                tdHtml = tdHtml + "</tr>";
                $("#tasksUL").append(tdHtml);
            });
        }
    });

"<Where><Eq><FieldRef Name=Assign_x0020_Date' /><Value Type='Date and Time'>IsNull</Value></Eq></Where>" +

函数加载优先级列表（）{
$（“#tasksUL”）.empty（）；
$（）.SPServices({
操作：“GetListItems”，
webURL:myURL，
listName:targetListName，
CAMLViewFields:“”，
CAMLQuery:“”+
'' +
'' +
'' +
'', 
CAMLRowLimit:listrowlimit，
completefunc：函数（扩展数据、状态）{
$（扩展数据.responseXML）.SPFilterNode（“z:row”）.each（函数（）{
var tdHtml=“”；
tdHtml=tdHtml+“”+PriorityFormat（$（this）.attr（“ows_Priority_x0020_Number”）；+“”；
tdHtml=tdHtml+“”；
tdHtml=tdHtml++$（this）.attr（“ows_优先级”）++；
tdHtml=tdHtml+“”+TopItem（$（this）.attr（“ows_Top_x0020_Item_x003f”）+“”；
tdHtml=tdHtml+“”+StringChk（$（this）.attr（“ows_Purpose”）+“”；
tdHtml=tdHtml+“”+StringChk（$（this）.attr（“ows_Item_x002d_Task_x0020_Order”）+“”；
tdHtml=tdHtml+“”+StringChk（$（this）.attr（“ows_模式”）+“”；
tdHtml=tdHtml+“”+StringChk（$（this）.attr（“ows_Task_x0020_Type”）+“”；
tdHtml=tdHtml+“”+StringChk（$（this）.attr（“ows_Work_x0020_Status”）+“”；
tdHtml=tdHtml+“”+FormatDate（$（this）.attr（“ows_DueDate”）+“”；
tdHtml=tdHtml+“”+FormatDate（$（this）.attr（“ows_DAK_x0020_Date”）+“”；
tdHtml=tdHtml+“”+StringChk（$（this）.attr（“ows_DAK_x0020_No”）+“”；
tdHtml=tdHtml+“”+StringChk（$（this）.attr（“ows_AssignedTo”）+“”；
tdHtml=tdHtml++$（this.attr（“ows_Money_x0020_Estimate”）+；
tdHtml=tdHtml+“”+StringChk（$（this）.attr（“ows_ItemStatus”）+“”；
tdHtml=tdHtml+“”+FormatDate（$（this）.attr（“ows_Assign_x0020_Date”）+“”；
tdHtml=tdHtml+“”；
$（“#tasksUL”）.append（tdHtml）；
});
}
});

我们将非常感谢您的帮助，并提前向您表示感谢

更新： 代码的最新版本如下。我添加了“WHERE”条款：

"<Where><Eq><FieldRef Name=Assign_x0020_Date' /><Value Type='Date and Time'>IsNull</Value></Eq></Where>" +

---

“由于我使用我的框架，我并不真正关心CAML，但它应该是这样的：

<query>
  <Query>
    <Where>
      <IsNull><FieldRef Name="Assign_x0020_Date"></FieldRef></IsNull>
    </Where>
  </Query>
</query>



顺便说一句，您可能想尝试我的框架：
语法将是（对于相同的事情）：

函数加载优先级列表（）{
$（“#tasksUL”）.empty（）；
$SP（）.list（targetListName）.get({
字段：“优先级\u x0020\u编号、编辑\u x0020\u链接、优先级、最上面的\u x0020\u项目\u x003f\u、目的、项目\u x002d\u任务\u x0020\u顺序、模式、工作\u x0020\u状态、截止日期、任务\u x0020\u类型、DAK\u x0020\u日期、DAK\u x0020\u编号、分配到、资金\u x0020\u估算、项目状态、分配\u x0020\u日期”，
其中：“分配日期=”，
订购人：“优先权号描述”，
rowlimit:listrowlimit
}，函数（扩展数据）{
var tdHTML=“”；
for（var i=xData.length；i--；）{
tdHtml+=“”；
tdHtml+=“”+PriorityFormat（扩展数据[i].getAttribute（“优先级”\ux0020\uNumber”）；+“”；
tdHtml+=''；
tdHtml++=“扩展数据[i].getAttribute（“优先级”）++；
tdHtml+=“”+TopItem（扩展数据[i].getAttribute（“Top\u x0020\u Item\u x003f”）+“”；
tdHtml++=“StringChk（扩展数据[i].getAttribute（“目的”）+”；
tdHtml++=“StringChk（扩展数据[i].getAttribute（“项目\u x002d\u任务\u x0020\u顺序”））+”；
tdHtml+=“”+StringChk（扩展数据[i].getAttribute（“模式”）+“”；
tdHtml+=“”+StringChk（扩展数据[i].getAttribute（“任务类型”）+“”；
tdHtml+=“”+StringChk（扩展数据[i].getAttribute（“工作状态”）+“”；
tdHtml+=“”+FormatDate（扩展数据[i].getAttribute（“DueDate”）+“”；
tdHtml+=“”+FormatDate（扩展数据[i].getAttribute（“DAK_x0020_Date”）+“”；
tdHtml+=“”+StringChk（扩展数据[i].getAttribute（“DAK_x0020_No”）+“”；
tdHtml++=“StringChk（扩展数据[i].getAttribute（“AssignedTo”）+”；
tdHtml+=“”+xData[i].getAttribute（“货币”估计数）；
tdHtml+=“”+StringChk（扩展数据[i].getAttribute（“ItemStatus”）+“”；
tdHtml+=“”+FormatDate（扩展数据[i].getAttribute（“分配日期”）+“”；
tdHtml+=“”；
}
$（“#tasksUL”）.append（tdHtml）；
}
});
啊，答案是必须使用IsNull。我修改了代码：

function loadPrioritizedList() {
    $("#tasksUL").empty();
    $().SPServices({
        operation: "GetListItems",    
        webURL: myURL,
        listName: targetListName,
        CAMLViewFields: "<ViewFields><FieldRef Name='Priority_x0020_Number' /><FieldRef Name='Edit_x0020_Link' /><FieldRef Name='Priority' /><FieldRef Name='Top_x0020_Item_x003f_' /><FieldRef Name='Purpose' /><FieldRef Name='Item_x002d_Task_x0020_Order' /><FieldRef Name='Mode' /><FieldRef Name='Work_x0020_Status' /><FieldRef Name='DueDate' /><FieldRef Name='Task_x0020_Type' /><FieldRef Name='DAK_x0020_Date' /><FieldRef Name='DAK_x0020_No' /><FieldRef Name='AssignedTo' /><FieldRef Name='Money_x0020_Estimate' /><FieldRef Name='ItemStatus' /><FieldRef Name='Assign_x0020_Date' /></ViewFields>",
        CAMLQuery: '<Query>' +
        '<OrderBy>' +
        '<FieldRef Name="Priority_x0020_Number" />' +
        '</OrderBy>' +
        '</Query>', 
        CAMLRowLimit: listrowlimit,  
        completefunc: function (xData, Status) {
            $(xData.responseXML).SPFilterNode("z:row").each(function() {
                var tdHtml = "<tr class='sortable_row' id=" + $(this).attr("ows_ID") + ">";
                tdHtml = tdHtml + "<td style=\"width:60px;\">" + PriorityFormat($(this).attr("ows_Priority_x0020_Number"));  + "</td>";
                tdHtml = tdHtml + '<td style=\"width:49px;\"><a href=\"'+($(this).attr("ows_Edit_x0020_Link")).split(", ")[1] + '\">' + ($(this).attr("ows_Edit_x0020_Link")).split(", ")[1] + '</a></td>';
                tdHtml = tdHtml + "<td style=\"width:83px;\">" + $(this).attr("ows_Priority") + "</td>";
                tdHtml = tdHtml + "<td style=\"width:63px;\">" + TopItem($(this).attr("ows_Top_x0020_Item_x003f_")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:300px;\">" + StringChk($(this).attr("ows_Purpose")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:125px;\">" + StringChk($(this).attr("ows_Item_x002d_Task_x0020_Order")) + "</td>";                     
                tdHtml = tdHtml + "<td style=\"width:40px;\">" + StringChk($(this).attr("ows_Mode")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:75px;\">" + StringChk($(this).attr("ows_Task_x0020_Type")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:150px;\">" + StringChk($(this).attr("ows_Work_x0020_Status")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:100px;\">" + FormatDate($(this).attr("ows_DueDate")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:100px;\">" + FormatDate($(this).attr("ows_DAK_x0020_Date")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:100px;\">" + StringChk($(this).attr("ows_DAK_x0020_No")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:300px;\">" + StringChk($(this).attr("ows_AssignedTo")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:125px;\">" + $(this).attr("ows_Money_x0020_Estimate") + "</td>";
                tdHtml = tdHtml + "<td style=\"width:75px;\">" + StringChk($(this).attr("ows_ItemStatus")) + "</td>";
                tdHtml = tdHtml + "<td style=\"width:100px;\">" + FormatDate($(this).attr("ows_Assign_x0020_Date")) + "</td>";
                tdHtml = tdHtml + "</tr>";
                $("#tasksUL").append(tdHtml);
            });
        }
    });

"<Where><Eq><FieldRef Name=Assign_x0020_Date' /><Value Type='Date and Time'>IsNull</Value></Eq></Where>" +

“”+

感谢这篇文章：
再次感谢您的帮助！不幸的是，我无法使用上述框架，无法实现您的框架。看看您的解决方案，我希望我可以！这是我回答的第一部分：-）@AymKdn-哦，哇，您说得对！我很抱歉-我这些天睡眠不多，一定是失去了知觉！
"<Where><IsNull><FieldRef Name=Assign_x0020_Date' /></IsNull></Where>" +