Dynamics CRM2016 Web API之Retrieve Multiple

之前的博文仅仅介绍了通过记录的primary key来查询单条记录或者单个属性值，本篇介绍多条记录的查询方法

var    filter = "?

$filter=name eq '123'";
    var req = new XMLHttpRequest()
    req.open("get", Xrm.Page.context.getClientUrl() + "/api/data/v8.0/accounts/" + filter, false);
    req.setRequestHeader("Accept", "application/json");
    req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
    req.setRequestHeader("OData-MaxVersion", "4.0");
    req.setRequestHeader("OData-Version", "4.0");
    req.onreadystatechange = function () {
        if (this.readyState == 4) {
            if (this.status == 200) {
                var data=JSON.parse(this.responseText).value;
            }
            else {
                var data=this.responseText;
            }
        }
    };
    req.send();

结果例如以下图。一个object即为一条数据记录，filter的写法和odata时一致。

watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" >

这里着重提下lookup字段的filter写法和原来的不大一样，这里lookup字段你的属性名为new_testid,在filter中的写法是_new_testid_value后面直接eq,另外个要注意的是guid上往往会带左右大括号{}，这个得去掉，简单的说就是严格遵守odata version4.0的语法就对了。

var filter="?$filter=_new_testid_value eq "+Xrm.Page.getAttribute("new_testid").getValue()[0].id.replace('{', '').replace('}', '')