Question

我需要根据所选帐户和业务单位在crm中设置合同查找字段。这是crm中的多对多关系。我能想到的最好方法是创建2个查询/ api调用（使用crm rest builder），以便能够根据条件执行此操作。第一个查询访问交叉表（帐户 - 合同表），以便根据帐户返回所有合同，秒需要通过循环遍历第一个查询的所有结果来进一步过滤结果，并对所有合同进行计数与所选业务单位匹配。我现在的问题是，我使用一个数组来推送第一个查询中的所有值，以便能够在第二个查询中循环。但是我创建的数组没有到达for循环，因此第二个查询没有执行

function populateContractLookup() {
    var buisnessUnitId = getFieldValue("hc_businessunit");
    var worksiteId = getFieldValue("hc_worksite")[0].id;
    worksiteId = stripCurlies(worksiteId);


    if (buisnessUnitId != null) {
        buisnessUnitId = stripCurlies(buisnessUnitId[0].id);
        var condition = "_hc_businessunit_value eq " + buisnessUnitId + " and";

    }
    else {
        condition = "";
    }//to be able to count the how many contracts that would hav gotten populated to contract lookup field
    var validcontractid;
    var contractCount = 0;
    var contractArray = [];
    //this query gets all contracts based on account
    var req = new XMLHttpRequest();
    req.open("GET", Xrm.Page.context.getClientUrl() + "/api/data/v8.2/hc_account_contractset?$select=contractid&$filter=accountid eq " + worksiteId, true);
    req.setRequestHeader("OData-MaxVersion", "4.0");
    req.setRequestHeader("OData-Version", "4.0");
    req.setRequestHeader("Accept", "application/json");
    req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
    req.setRequestHeader("Prefer", "odata.include-annotations=\"*\"");
    req.onreadystatechange = function () {
        if (this.readyState === 4) {
            req.onreadystatechange = null;
            if (this.status === 200) {
                var results = JSON.parse(this.response);
               // Xrm.Utility.alertDialog(results.value.length);

                for (var i = 0; i < results.value.length; i++) {
                    var contractid = results.value[i]["contractid"];
                   // Xrm.Utility.alertDialog(contractid);
                    contractArray.push(contractid);


                }
            } else {
                Xrm.Utility.alertDialog(this.statusText);
            }
        }// Xrm.Utility.alertDialog(contractArray.length) prints to the screen here
    };
    req.send();
    //query to furthr filter the above query to get all contracts based on the buisness unit

    //Xrm.Utility.alertDialog(contractArray.length);//not printing to screen
    for (var i = 0; i < contractArray.length; i++) {

        Xrm.Utility.alertDialog("were in the loop"); //not reaching this loop
        var req = new XMLHttpRequest();
        req.open("GET", Xrm.Page.context.getClientUrl() + "/api/data/v8.2/contracts?$select=contractid&$filter=contractid eq " + contractArray[i] + " and  _hc_businessunit_value eq " + buisnessUnitId, true);
        req.setRequestHeader("OData-MaxVersion", "4.0");
        req.setRequestHeader("OData-Version", "4.0");
        req.setRequestHeader("Accept", "application/json");
        req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
        req.setRequestHeader("Prefer", "odata.include-annotations=\"*\"");
        req.onreadystatechange = function () {
            if (this.readyState === 4) {
                req.onreadystatechange = null;
                if (this.status === 200) {
                    var results = JSON.parse(this.response);
                    Xrm.Utility.alertDialog(results.value.length);
                    for (var i = 0; i < results.value.length; i++) {
                        contractCount++;
                    }
                } else {
                    Xrm.Utility.alertDialog(this.statusText);
                }
            }
        };
        req.send();
    }
}

。为什么我无法访问我的文件的想法？

Answer 1

Your first request is asynchronous. The code after your first req.send() is executing immediately, whereas you need the result of your first request to have been returned before any other code executes.

You therefore need to wrap your second request, which is dependent on the result of the first, into a callback function. You then call this callback function in the success callback of your first request.

See this StackOverflow answer for information on callback functions.

As an aside, your second request won't work. You're trying to execute a request once per contract that was retrieved. What you want to do is build your OData filter by iterating over contractArray array and writing '(contractid eq ' + contractArray[i] + ') or' //...

As another aside, consider using a FetchXML aggregate to count records.

Your code might look something like this:

var buisnessUnitId = getFieldValue("hc_businessunit");
var worksiteId = getFieldValue("hc_worksite")[0].id;

function populateContractLookup() {        
    worksiteId = stripCurlies(worksiteId);

    if (buisnessUnitId != null) {
        buisnessUnitId = stripCurlies(buisnessUnitId[0].id);
        var condition = "_hc_businessunit_value eq " + buisnessUnitId + " and";
    }
    else {
        condition = "";
    }//to be able to count the how many contracts that would hav gotten populated to contract lookup field
    var validcontractid;
    var contractCount = 0;
    var contractArray = [];
    //this query gets all contracts based on account
    var req = new XMLHttpRequest();
    req.open("GET", Xrm.Page.context.getClientUrl() + "/api/data/v8.2/hc_account_contractset?$select=contractid&$filter=accountid eq " + worksiteId, true);
    req.setRequestHeader("OData-MaxVersion", "4.0");
    req.setRequestHeader("OData-Version", "4.0");
    req.setRequestHeader("Accept", "application/json");
    req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
    req.setRequestHeader("Prefer", "odata.include-annotations=\"*\"");
    req.onreadystatechange = function () {
        if (this.readyState === 4) {
            req.onreadystatechange = null;
            if (this.status === 200) {
                var results = JSON.parse(this.response);
               // Xrm.Utility.alertDialog(results.value.length);

                for (var i = 0; i < results.value.length; i++) {
                    var contractid = results.value[i]["contractid"];
                    // Xrm.Utility.alertDialog(contractid);
                    contractArray.push(contractid);                        
                }
                // Call your callback function.
                countContracts(contractArray);
            } else {
                Xrm.Utility.alertDialog(this.statusText);
            }
        }// Xrm.Utility.alertDialog(contractArray.length) prints to the screen here
    };
    req.send();
}

Your callback function (though as I've mentioned above this needs rewriting):

function countContracts(contractArray) {
    for (var i = 0; i < contractArray.length; i++) {
        Xrm.Utility.alertDialog("were in the loop"); //not reaching this loop
        var req = new XMLHttpRequest();
        req.open("GET", Xrm.Page.context.getClientUrl() + "/api/data/v8.2/contracts?$select=contractid&$filter=contractid eq " + contractArray[i] + " and  _hc_businessunit_value eq " + buisnessUnitId, true);
        req.setRequestHeader("OData-MaxVersion", "4.0");
        req.setRequestHeader("OData-Version", "4.0");
        req.setRequestHeader("Accept", "application/json");
        req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
        req.setRequestHeader("Prefer", "odata.include-annotations=\"*\"");
        req.onreadystatechange = function () {
            if (this.readyState === 4) {
                req.onreadystatechange = null;
                if (this.status === 200) {
                    var results = JSON.parse(this.response);
                    Xrm.Utility.alertDialog(results.value.length);
                    for (var i = 0; i < results.value.length; i++) {
                        contractCount++;
                    }
                } else {
                    Xrm.Utility.alertDialog(this.statusText);
                }
            }
        };
        req.send();
    }
}

Answer 2

您可以尝试通过更改下面的标记来尝试将第一个呼叫切换为同步呼叫。结果将在第二次通话之前立即可用。

req.open("GET", Xrm.Page.context.getClientUrl() + "/api/data/v8.2/hc_account_contractset?$select=contractid&$filter=accountid eq " + worksiteId, false);

Dynamics crm rest builder查询多对多关系

2 个答案: