Javascript 在解决内部承诺之前，承诺链将继续

类似的问题，但我不能让它工作无故障

每次我认为我理解承诺，我就证明自己错了

我有这样写的函数

function getFileBinaryData () {
    var promise = new RSVP.Promise(function(resolve, reject){
        var executorBody = {
            url: rootSite + sourceRelativeUrl + "/_api/web/GetFileByServerRelativeUrl('" + fileUrl + "')/$value",
            method: "GET",
            binaryStringResponseBody: true,
            success: function (fileData) {
                resolve(fileData.body);
            },
            error: function  (argument) {

                alert("could not get file binary body")
            }            
        }
        sourceExecutor.executeAsync(executorBody);
    });
    return promise;
}

function copyFileAction (fileBinaryData) {
    var promise = new RSVP.Promise(function(resolve, reject){
        var executorBody = {
            url: rootSite + targetWebRelativeUrl + "/_api/web/GetFolderByServerRelativeUrl('" + targetList + "')/Files/Add(url='" + fileName + "." + fileExt + "', overwrite=true)",
            method: "POST",
            headers: {
                "Accept": "application/json; odata=verbose"
            },
            contentType: "application/json;odata=verbose",
            binaryStringRequestBody: true,
            body: fileBinaryData,
            success: function (copyFileData) {
                resolve();
            },
            error: function  (sender, args) {

            }
        }
        targetExecutor.executeAsync(executorBody);    
    });
    return promise;
}

$.getScript("/_layouts/15/SP.RequestExecutor.js")
            .then(patchRequestExecutor)
            .then(function(){
                sourceExecutor = new SP.RequestExecutor(sourceFullUrl);
                targetExecutor = new SP.RequestExecutor(targetList);
            })
            .then(getFileInformation)
            .then(getFileBinaryData)
            .then(copyFileAction)
            .then(getTargetListItem)
            .then(updateTargetListItem)
            .catch(function (sender, args) {

            });

$.getScript("/_layouts/15/SP.RequestExecutor.js")
            .then(patchRequestExecutor)
            .then(function(){
                sourceExecutor = new SP.RequestExecutor(sourceFullUrl);
                targetExecutor = new SP.RequestExecutor(targetList);
            })
            .then(function(){
                return getFileInformation();
            })
            .then(function(){
                return getFileBinaryData();
            })
            .then(function(binaryData){
                return copyFileAction(binaryData)
            })
            .then(function(){
                return getTargetListItem();
            })
            .then(function(listItem){
                return updateTargetListItem(listItem);
            });

我试着像这样锁链

function getFileBinaryData () {
    var promise = new RSVP.Promise(function(resolve, reject){
        var executorBody = {
            url: rootSite + sourceRelativeUrl + "/_api/web/GetFileByServerRelativeUrl('" + fileUrl + "')/$value",
            method: "GET",
            binaryStringResponseBody: true,
            success: function (fileData) {
                resolve(fileData.body);
            },
            error: function  (argument) {

                alert("could not get file binary body")
            }            
        }
        sourceExecutor.executeAsync(executorBody);
    });
    return promise;
}

function copyFileAction (fileBinaryData) {
    var promise = new RSVP.Promise(function(resolve, reject){
        var executorBody = {
            url: rootSite + targetWebRelativeUrl + "/_api/web/GetFolderByServerRelativeUrl('" + targetList + "')/Files/Add(url='" + fileName + "." + fileExt + "', overwrite=true)",
            method: "POST",
            headers: {
                "Accept": "application/json; odata=verbose"
            },
            contentType: "application/json;odata=verbose",
            binaryStringRequestBody: true,
            body: fileBinaryData,
            success: function (copyFileData) {
                resolve();
            },
            error: function  (sender, args) {

            }
        }
        targetExecutor.executeAsync(executorBody);    
    });
    return promise;
}

$.getScript("/_layouts/15/SP.RequestExecutor.js")
            .then(patchRequestExecutor)
            .then(function(){
                sourceExecutor = new SP.RequestExecutor(sourceFullUrl);
                targetExecutor = new SP.RequestExecutor(targetList);
            })
            .then(getFileInformation)
            .then(getFileBinaryData)
            .then(copyFileAction)
            .then(getTargetListItem)
            .then(updateTargetListItem)
            .catch(function (sender, args) {

            });

$.getScript("/_layouts/15/SP.RequestExecutor.js")
            .then(patchRequestExecutor)
            .then(function(){
                sourceExecutor = new SP.RequestExecutor(sourceFullUrl);
                targetExecutor = new SP.RequestExecutor(targetList);
            })
            .then(function(){
                return getFileInformation();
            })
            .then(function(){
                return getFileBinaryData();
            })
            .then(function(binaryData){
                return copyFileAction(binaryData)
            })
            .then(function(){
                return getTargetListItem();
            })
            .then(function(listItem){
                return updateTargetListItem(listItem);
            });

还是像这样

function getFileBinaryData () {
    var promise = new RSVP.Promise(function(resolve, reject){
        var executorBody = {
            url: rootSite + sourceRelativeUrl + "/_api/web/GetFileByServerRelativeUrl('" + fileUrl + "')/$value",
            method: "GET",
            binaryStringResponseBody: true,
            success: function (fileData) {
                resolve(fileData.body);
            },
            error: function  (argument) {

                alert("could not get file binary body")
            }            
        }
        sourceExecutor.executeAsync(executorBody);
    });
    return promise;
}

function copyFileAction (fileBinaryData) {
    var promise = new RSVP.Promise(function(resolve, reject){
        var executorBody = {
            url: rootSite + targetWebRelativeUrl + "/_api/web/GetFolderByServerRelativeUrl('" + targetList + "')/Files/Add(url='" + fileName + "." + fileExt + "', overwrite=true)",
            method: "POST",
            headers: {
                "Accept": "application/json; odata=verbose"
            },
            contentType: "application/json;odata=verbose",
            binaryStringRequestBody: true,
            body: fileBinaryData,
            success: function (copyFileData) {
                resolve();
            },
            error: function  (sender, args) {

            }
        }
        targetExecutor.executeAsync(executorBody);    
    });
    return promise;
}

$.getScript("/_layouts/15/SP.RequestExecutor.js")
            .then(patchRequestExecutor)
            .then(function(){
                sourceExecutor = new SP.RequestExecutor(sourceFullUrl);
                targetExecutor = new SP.RequestExecutor(targetList);
            })
            .then(getFileInformation)
            .then(getFileBinaryData)
            .then(copyFileAction)
            .then(getTargetListItem)
            .then(updateTargetListItem)
            .catch(function (sender, args) {

            });

$.getScript("/_layouts/15/SP.RequestExecutor.js")
            .then(patchRequestExecutor)
            .then(function(){
                sourceExecutor = new SP.RequestExecutor(sourceFullUrl);
                targetExecutor = new SP.RequestExecutor(targetList);
            })
            .then(function(){
                return getFileInformation();
            })
            .then(function(){
                return getFileBinaryData();
            })
            .then(function(binaryData){
                return copyFileAction(binaryData)
            })
            .then(function(){
                return getTargetListItem();
            })
            .then(function(listItem){
                return updateTargetListItem(listItem);
            });

---

但问题是，即使我返回新的承诺，在任何内部承诺得到解决之前，执行仍在继续。怎么会？它是否应该等到异步请求成功，并且在

成功

回调中调用

resolve（）

？

您在这里没有做错什么。这是jQuery的错，1

问题是jQuery不兼容（直到V3.0），并且无法从其他实现中采用Promissions/thenable，而不是它自己的实现。因此，当您的回调确实返回RSVP承诺时，jQuery只是将它们视为要实现的值，而不是等待它们。
您可以将所有承诺都投给延迟的jQuery，它会工作，但您确实不希望这样。要使标准的

承诺

行为（由RSVP提供）起作用，您需要避免jQuery的bug

then

。这：

---

你能提供一个小而完整的片段来重现这个问题吗？从这里我看不到您的代码中有任何缺陷，应该可以正常工作。这一定是因为并非所有异步函数都返回承诺。我将尝试修改代码以实现它！不要忘记在错误回调中拒绝。例如，你真的应该彻底地更换

警报

！它更像是一个调试助手，可以查看它可能失败的地方！1） 当前位置本机承诺和RSVPGeebus也发生了这种情况，我从未想过这可能是因为这一点，但它现在确实起作用了！非常感谢！