我创建了一个自定义表单，其中包含动态子表单。 例如：自定义表单由3个部分组成：
这里我的脚本如何用于添加数据：父表单被提交并且它使用jsom返回项目ID。并且基于该项目ID，附件被添加到父表单，子表单数据被添加到另一个列表中。但有时，我在添加附件时遇到冲突问题，这里是代码：
if (flag == true) {
oLoader = SP.UI.ModalDialog.showWaitScreenWithNoClose("Working on it", "Creating a new Request...");
var data = [];
var fileArray = [];
$("#attachFilesContainer input:file").each(function () {
if ($(this)[0].files[0]) {
fileArray.push({ "Attachment": $(this)[0].files[0] });
}
});
arraycount += fileArray.length;
data.push({
"Column_x0020_Name": $("#txtAccountNumber").val(),
"Warehouse_x0020_Code": $("#wareHousedrpdown option:selected").text(),
"Facility": $("#Facilitydrpdown option:selected").text(),
"Internal_x002f_External": $("#InternalExteralDrpdown :selected").text(),
"Requested_x0020_Completion_x0020": newReqDate,//$("#txtRequestedCompletionDate").datepicker('getDate').format('MM/dd/yyyy'), //$("#txtRequestedCompletionDate").val(),
"Account_x0020_Management_x0020_A": AccountName,
"Quote_x0020_Required_x003f_": $("#drpQuoteRequired :selected").text(),
"Files": fileArray
});
createItemWithAttachments("Parent", data).then(
function () {
oLoader.close();
window.location.replace(_spPageContextInfo.webAbsoluteUrl + "/Lists/Parent/AllItems.aspx");
//if (oLoader.close) setTimeout(function () { oLoader.close(); window.location.replace(_spPageContextInfo.webAbsoluteUrl + "/Lists/Test/AllItems.aspx"); }, 3000);
//alert('Item created with Multiple attachments');
},
function (sender, args) {
console.log('Error occured' + args.get_message());
}
)
//oLoader.close();
//window.location.replace(_spPageContextInfo.webAbsoluteUrl + "/Lists/Parent/AllItems.aspx");
}
function createSubformItem(listName,i) {
var listItem = {
__metadata: { "type": "SP.Data.SubFormListItem" },
"ParentID": id,
"Start_x0020_SKU":$("input[id='txtStartSKU" + i + "']").val(),
"Qty_x0020_Requested":$("input[id='txtQtyRequested" + i + "']").val(),
"UOM":$("#UOMdrpdown" + i + " option:selected").val(),
"SSRType":$("#SSRTypedrpdown" + i + " option:selected").val()!="null" ? { "__metadata": { "type": "Collection(Edm.String)" }, "results": $("#SSRTypedrpdown"+i+"").val() } : { "__metadata": { "type": "Collection(Edm.String)" }, "results": [""] },
"Hold_x0020_Type":$("#SSRHoldTypedrpdown" + i + " option:selected").val(),
"End_x0020_SKU":$("input[id='txtEndSKU" + i + "']").val(),
"Billing_x0020_UOM":$("#BillingUOMdrpdown" + i + " option:selected").val(),
"Price_x0020_per_x0020_UOM":$("input[id='txtPricePerUOM" + i + "']").val(),
"Instructions":$("textarea[title='Instructions" + i + "']").val(),
};
return $.ajax({
url:"http://devapp/app/_api/web/lists/getbytitle('SubForm')/items",
type: "POST",
contentType: "application/json;odata=verbose",
data: JSON.stringify(listItem),
headers: {
"Accept": "application/json;odata=verbose",
"X-RequestDigest": $("#__REQUESTDIGEST").val()
}
});
}
var createItemWithAttachments = function (listName, listValues) {
var fileCountCheck = 0;
var fileNames;
var context = new SP.ClientContext.get_current();
var dfd = $.Deferred();
var targetList = context.get_web().get_lists().getByTitle(listName);
context.load(targetList);
var singleUser = listValues[0].Account_x0020_Management_x0020_A != "" ? SP.FieldUserValue.fromUser(listValues[0].Account_x0020_Management_x0020_A) : null;
var itemCreateInfo = new SP.ListItemCreationInformation();
var listItem = targetList.addItem(itemCreateInfo);
listItem.set_item("Account_x0020_Number", listValues[0].Account_x0020_Number);
listItem.set_item("Warehouse_x0020_Code", listValues[0].Warehouse_x0020_Code);
listItem.set_item("Facility", listValues[0].Facility);
listItem.set_item("Internal_x002f_External", listValues[0].Internal_x002f_External);
listItem.set_item("Requested_x0020_Completion_x0020", listValues[0].Requested_x0020_Completion_x0020);
listItem.set_item("Account_x0020_Management_x0020_A", singleUser);
listItem.set_item("Quote_x0020_Required_x003f_", listValues[0].Quote_x0020_Required_x003f_);
listItem.update();
for (i = 0; i <= count; i++)
{
createSubformItem("SubForm",i);
}
context.executeQueryAsync(
function () {
id = listItem.get_id();
if (listValues[0].Files.length != 0) {
if (fileCountCheck <= listValues[0].Files.length - 1) {
loopFileUpload(listName, id, listValues, fileCountCheck).then(
function () {
},
function (sender, args) {
console.log("Error uploading");
dfd.reject(sender, args);
}
);
}
}
else {
dfd.resolve(fileCountCheck);
}
},
function (sender, args) {
console.log('Error occured' + args.get_message());
}
);
return dfd.promise();
}
/*End of */
function loopFileUpload(listName, id, listValues, fileCountCheck) {
var dfd = $.Deferred();
uploadFile(listName, id, listValues[0].Files[fileCountCheck].Attachment).then(
function (data) {
var objcontext = new SP.ClientContext();
var targetList = objcontext.get_web().get_lists().getByTitle(listName);
var listItem = targetList.getItemById(id);
objcontext.load(listItem);
objcontext.executeQueryAsync(function () {
console.log("Reload List Item- Success");
fileCountCheck++;
if (fileCountCheck <= listValues[0].Files.length - 1) {
loopFileUpload(listName, id, listValues, fileCountCheck);
} else {
console.log(fileCountCheck + ": Files uploaded");
attcount += fileCountCheck;
if (arraycount == attcount) {
for (i = 0; i <= count; i++)
{
createSubformItem("SubForm",i);
}
oLoader.close();
window.location.replace(_spPageContextInfo.webAbsoluteUrl + "/Lists/ParentList/AllItems.aspx");
}
}
},
function (sender, args) {
console.log("Reload List Item- Fail" + args.get_message());
});
},
function (sender, args) {
console.log("Not uploaded");
dfd.reject(sender, args);
}
);
return dfd.promise();
}
function uploadFile(listName, id, file) {
var deferred = $.Deferred();
var fileName = file.name;
getFileBuffer(file).then(
function (buffer) {
var bytes = new Uint8Array(buffer);
var binary = '';
for (var b = 0; b < bytes.length; b++) {
binary += String.fromCharCode(bytes[b]);
}
var scriptbase = _spPageContextInfo.webServerRelativeUrl + "/_layouts/15/";
console.log(' File size:' + bytes.length);
$.getScript(scriptbase + "SP.RequestExecutor.js", function () {
var createitem = new SP.RequestExecutor(_spPageContextInfo.webServerRelativeUrl);
createitem.executeAsync({
url: _spPageContextInfo.webServerRelativeUrl + "/_api/web/lists/GetByTitle('" + listName + "')/items(" + id + ")/AttachmentFiles/add(FileName='" + file.name + "')",
method: "POST",
binaryStringRequestBody: true,
body: binary,
success: fsucc,
error: ferr,
state: "Update"
});
function fsucc(data) {
console.log(data + ' uploaded successfully');
deferred.resolve(data);
}
function ferr(data) {
console.log(fileName + "not uploaded error");
deferred.reject(data);
}
});
},
function (err) {
deferred.reject(err);
}
);
return deferred.promise();
}
function getFileBuffer(file) {
var deferred = $.Deferred();
var reader = new FileReader();
reader.onload = function (e) {
deferred.resolve(e.target.result);
}
reader.onerror = function (e) {
deferred.reject(e.target.error);
}
reader.readAsArrayBuffer(file);
return deferred.promise();
}
答案 0 :(得分：1)
问题是在SharePoint完成处理具有较大文件的项目之前上载另一个附件。因此，当您尝试对项目执行另一个操作（添加其他附件等）时，会达到争用条件，SharePoint会抛出错误。当附件文件较小时，该过程有足够的时间在您开始下一次上载之前完成。
您需要找到一种方法来检查项目是否已完成处理。这样做的一种方法可能是获取并检查项目的etag，并确保在发送另一个POST之前它已经增加了正确的次数。