Breeze.js 查询不更新淘汰赛视图 [英] Breeze.js query does not update knockout view

问题描述

我正在通过微风.js 查询数据，第一次运行正常.第二次没有更新视图.

I am querying data via breeze.js which works fine the first time. The second time the view isn't updated.

html

<a id="linkQDate">Order by Newest</a>
<a id="linkQScore">Order by Score</a>

<div id="questionWrapper">
    <ul data-bind="foreach: results">
    <li>
       <strong><span data-bind="text: Score"></span></strong>
       <span data-bind="text: Titel"></span>
    </li>
    </ul>
</DIV>

js

$(document).ready(function () {
var manager = new breeze.EntityManager('/breeze/dbentities');
var isApplied = false;
var dmodel;

$("#linkQDate").click(function () {
    var query = breeze.EntityQuery.from("Questions").orderBy("Date");
    manager.executeQuery(query).then(querySucceeded);
    function querySucceeded(data) {
        dmodel = data;
        if (!isApplied) {

            ko.applyBindings(dmodel, $("#questionWrapper")[0]);
            isApplied = true;
       }
    }

});
$("#linkQScore").click(function () {
    var query = breeze.EntityQuery.from("Questions").orderBy("Score");
    manager.executeQuery(query).then(querySucceeded);
    function querySucceeded(data) {
        dmodel = data;
        if (!isApplied) {
            ko.applyBindings(dmodel, $("#questionWrapper")[0]);
            isApplied = true;
        }
    }

});
});

推荐答案

如果你只使用普通的 JS 对象，它是行不通的.因为它不知道底层数据何时发生变化.使用 mapping plugin 使其工作:

If you just using plain JS objects it will not work. Because it does not know when underlying data changes. Use mapping plugin for this to work:

$(document).ready(function () {
    var manager = new breeze.EntityManager('/breeze/dbentities');
    var isApplied = false;
    var dmodel;

    function querySucceeded(data) {
        if (!isApplied) {
            dmodel = ko.mapping.fromJS(data);
            ko.applyBindings(dmodel, $("#questionWrapper")[0]);
            isApplied = true;
        } else {
            ko.mapping.fromJS(data, dmodel);
        }
    }

    $("#linkQDate").click(function () {
        var query = breeze.EntityQuery.from("Questions").orderBy("Date");
        manager.executeQuery(query).then(querySucceeded);
    });

    $("#linkQScore").click(function () {
        var query = breeze.EntityQuery.from("Questions").orderBy("Score");
    });
});

这篇关于Breeze.js 查询不更新淘汰赛视图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！