Question

我有以下JavaScript代码

＆＃13;

function getWorkflowSchemeName(projectKey, callback){
	var restCall = AJS.params.baseURL+"/rest/projectconfig/1/workflowscheme/"+projectKey

	AJS.$.get(restCall, function(response){
		if(response != null){
			callback(response.name)
		}
		console.log("Im in here")
	})
}

pairTypeValues = {}
AJS.$.each(AJS.$(".projects-list tr td:nth-child(3)"), function(index, value){
	
	getWorkflowSchemeName(value.innerText, function(workflowSchemeName){
		pairTypeValues[value.innerText] = workflowSchemeName
		})
})

//The following code MUST run after ALL the pairTypeValues are recieved. 

counter = 1	
AJS.$.each(AJS.$(".projects-list tr td:nth-child(3)"), function(ind,val){
	AJS.$.each(pairTypeValues, function(index,value){
		if(val.innerText == index){
			console.log("SUP")
			AJS.$(".projects-list tr:nth-child("+counter+")").append("<td>"+value+"</td>")	
		}
	})
	counter++
})

＆＃13;

我正在进行大量的休息调用并在PairTypeValues对象中保存响应。（获取所有数据需要时间）

最后一段代码负责添加PairTypeValues中的数据。

我已尝试单独运行最后一个块（而不是单个文件执行）并且运行正常，因为在此之前所有值都存储在PairTypeValues对象中。但是当我一起运行代码时，它并没有打印任何东西。

我尝试添加另一个回调，但它没有工作：

＆＃13;

function getWorkflowSchemeName(projectKey, callback){
	var restCall = AJS.params.baseURL+"/rest/projectconfig/1/workflowscheme/"+projectKey

	AJS.$.get(restCall, function(response){
		if(response != null){
			callback(response.name)
		}
		console.log("Im in here")
	})
}

function makingPairTypes(anotherCallback){
	pairTypeValues = {}
	AJS.$.each(AJS.$(".projects-list tr td:nth-child(3)"), function(index, value){
	
		getWorkflowSchemeName(value.innerText, function(workflowSchemeName){
			anotherCallback(pairTypeValues[value.innerText] = workflowSchemeName)
			})
	})
}

	counter = 1	
	AJS.$.each(AJS.$(".projects-list tr td:nth-child(3)"), function(ind,val){
		makingPairTypes(function(secondCallback){
		AJS.$.each(secondCallback, function(index,value){
			if(val.innerText == index){
				console.log("SUP")
				AJS.$(".projects-list tr:nth-child("+counter+")").append("<td>"+value+"</td>")	
			}
		})
		})
		counter++
	})

＆＃13;

我也尝试使用延期方法，但这对我来说也不起作用：

＆＃13;

function makingPairTypes(){
var pairTypeValues = {}
AJS.$.each(AJS.$(".projects-list tr td:nth-child(3)"), function(index, value){
	
	getWorkflowSchemeName(value.innerText, function(workflowSchemeName){
		pairTypeValues[value.innerText] = workflowSchemeName
		})
})
}

//The following code MUST run after ALL the pairTypeValues are recieved. 

function addingSchemeNames(){
counter = 1	
AJS.$.each(AJS.$(".projects-list tr td:nth-child(3)"), function(ind,val){
	AJS.$.each(pairTypeValues, function(index,value){
		if(val.innerText == index){
			console.log("SUP")
			AJS.$(".projects-list tr:nth-child("+counter+")").append("<td>"+value+"</td>")	
		}
	})
	counter++
})
}

var dm = AJS.$.Deferred();

dm.done([makingPairTypes, addingSchemeNames]);

＆＃13;

我只想确保在执行最后一个块之前收集所有pairTypeValues。

有人可以帮帮我吗？我不想在代码中插入SetTimeOuts。

非常感谢提前

Answer 1

有使用Promises和Promise.all等现代解决方案。但我认为你所拥有的实际上只有一条逻辑远离工作。您只需要跟踪响应的运行数量，每次执行时都在响应回调中更新它，然后当您拥有它们时，从响应回调中触发最终的代码函数。

function getWorkflowSchemeName(projectKey, callback){
    var restCall = AJS.params.baseURL+"/rest/projectconfig/1/workflowscheme/"+projectKey;

    AJS.$.get(restCall, function(response){
        callback(response);
    })
};

pairTypeValues = {};
doneIfZero = AJS.$(".projects-list tr td:nth-child(3)").length;
AJS.$.each(AJS.$(".projects-list tr td:nth-child(3)"), function(index, value){
    getWorkflowSchemeName(value.innerText, function(response){
        var workflowSchemeName = response.name;
        if(workflowSchemeName != null){
            pairTypeValues[value.innerText] = workflowSchemeName;
        }
        doneIfZero--;
        if (doneIfZero === 0) {
            codeToRunAfterAllResponsesAreBack()
        }
    });
});

//The following code MUST run after ALL the pairTypeValues are recieved.
function codeToRunAfterAllResponsesAreBack(){
    counter = 1
    AJS.$.each(AJS.$(".projects-list tr td:nth-child(3)"), function(ind,val){
        AJS.$.each(pairTypeValues, function(index,value){
            if(val.innerText == index){
                AJS.$(".projects-list tr:nth-child("+counter+")").append("<td>"+value+"</td>")
            }
        });
        counter++
    });
};

如何在上一个块完成后确保运行一个JavaScript块？

1 个答案: