Javascript 将一个新的内部对象插入到可观察对象数组中,并更新DOM
带绑定的HTML:Javascript 将一个新的内部对象插入到可观察对象数组中,并更新DOM,javascript,html,knockout.js,Javascript,Html,Knockout.js,带绑定的HTML: <div class="container" data-bind="foreach: { data: Conferences, as: 'conf' }"> <div class="conf" data-bind="attr: { id : conf.Id }"> <div class="conf-month" data-bind="text: conf.StartTime"></div>
<div class="container" data-bind="foreach: { data: Conferences, as: 'conf' }">
<div class="conf" data-bind="attr: { id : conf.Id }">
<div class="conf-month" data-bind="text: conf.StartTime"></div>
<div class="conf-day" data-bind="text: conf.EndTime"></div>
<div class="add-user">
<input type="tel" data-bind="value: $root.PhoneNumber />
<input type="email" data-bind="value: $root.Email" />
<a id="add-user" title="Add new user" data-bind="attr: { value: conf.Id }, click: $root.addUserToConference">Add</a>
</div>
<div class="conf-users" data-bind="foreach: { data: conf.ConferenceUsers, as: 'user' }">
<div class="conf-user" data-bind="attr: { id: 'confuser-' + user.Id}">
<span data-bind="text: user.Name"></span>
<span data-bind="text: user.PhoneNumber"></span>
<span data-bind="text: user.Email"></span>
</div>
</div>
</div>
</div>
function ConferenceViewModel() {
var self = this;
self.Conferences = ko.observableArray([]);
self.PhoneNumber = ko.observable("");
self.Email = ko.observable("");
self.getAllConfs = function () {
$.ajax({
type: 'GET',
url: '/confs/getconfs',
}).done(function (confs) {
$.each(confs, function (index, conf) {
//populate the list on document ready
confVm.Conferences.push(conf);
};
}).fail(showError);
}
self.addUserToConference = function (viewModel, event) {
var user = {
"Id": 0,
"ConferenceId": viewModel.Id(),
"Email": "self.Email()",
"PhoneNumber": self.PhoneNumber(),
};
// here we should insert a new ConferenceUser into the Conferences observable array
// and also update the DOM
// ajax to insert user to db
}
在我通过ajax填充上述会议之后,
console.log(ko.toJSON(confVm.Conferences())
的输出如下:
[
{
"ConferenceUsers":[
{
"Id":3006,
"ConferenceId":8,
"Name":null,
"Email":"mail@lala.com",
"UserName":null,
"PhoneNumber":"234234234234",
"ChannelId":null,
"State":null,
"Type":null,
"RecordingId":null
}
],
"Id":8,
"Subject":"YYYhaaaaa",
"StartTime":"2016-05-29T18:30:00",
"EndTime":"2016-05-29T19:30:00",
"OrganizerEmail":"elpas@live.com",
"OrganizerName":"dasdasd",
"Pin":"6402",
"BridgeId":null,
"State":null
},
{
"ConferenceUsers":[
{
"Id":3013,
"ConferenceId":12,
"Name":null,
"Email":"dsfdfsdfdsf@dfdfdf.com",
"UserName":null,
"PhoneNumber":null,
"ChannelId":null,
"State":null,
"Type":null,
"RecordingId":null
}
],
"Id":12,
"Subject":"dsfsdfdsfsdf",
"StartTime":"2016-05-31T22:00:00",
"EndTime":"2016-05-31T23:00:00",
"OrganizerEmail":"d@adssad.com",
"OrganizerName":"dsfdsfsdf",
"Pin":"3402",
"BridgeId":null,
"State":null
}
]
Q:如何通过ConferenceId插入新ConferenceUser并相应地更新DOM?试试以下方法:
var obj = [
{
"ConferenceUsers":[
{
"Id":3006,
"ConferenceId":8,
"Name":null,
"Email":"mail@lala.com",
"UserName":null,
"PhoneNumber":"234234234234",
"ChannelId":null,
"State":null,
"Type":null,
"RecordingId":null
}
],
"Id":8,
"Subject":"YYYhaaaaa",
"StartTime":"2016-05-29T18:30:00",
"EndTime":"2016-05-29T19:30:00",
"OrganizerEmail":"elpas@live.com",
"OrganizerName":"dasdasd",
"Pin":"6402",
"BridgeId":null,
"State":null
},
{
"ConferenceUsers":[
{
"Id":3013,
"ConferenceId":12,
"Name":null,
"Email":"dsfdfsdfdsf@dfdfdf.com",
"UserName":null,
"PhoneNumber":null,
"ChannelId":null,
"State":null,
"Type":null,
"RecordingId":null
}
],
"Id":12,
"Subject":"dsfsdfdsfsdf",
"StartTime":"2016-05-31T22:00:00",
"EndTime":"2016-05-31T23:00:00",
"OrganizerEmail":"d@adssad.com",
"OrganizerName":"dsfdsfsdf",
"Pin":"3402",
"BridgeId":null,
"State":null
}
];
/* Iterate all conferences */
for (var i in obj) {
/* Find conference with ID = 8 */
if (obj[i].Id === 8) {
/* Add a new user to the conference */
obj[i].ConferenceUsers.push({
"Id":1111,
"ConferenceId":1,
"Name":null,
"Email":"test@example.com",
"UserName":null,
"PhoneNumber":null,
"ChannelId":null,
"State":null,
"Type":null,
"RecordingId":null
});
break;
}
}
console.log(obj); // output result
试试这个:
var obj = [
{
"ConferenceUsers":[
{
"Id":3006,
"ConferenceId":8,
"Name":null,
"Email":"mail@lala.com",
"UserName":null,
"PhoneNumber":"234234234234",
"ChannelId":null,
"State":null,
"Type":null,
"RecordingId":null
}
],
"Id":8,
"Subject":"YYYhaaaaa",
"StartTime":"2016-05-29T18:30:00",
"EndTime":"2016-05-29T19:30:00",
"OrganizerEmail":"elpas@live.com",
"OrganizerName":"dasdasd",
"Pin":"6402",
"BridgeId":null,
"State":null
},
{
"ConferenceUsers":[
{
"Id":3013,
"ConferenceId":12,
"Name":null,
"Email":"dsfdfsdfdsf@dfdfdf.com",
"UserName":null,
"PhoneNumber":null,
"ChannelId":null,
"State":null,
"Type":null,
"RecordingId":null
}
],
"Id":12,
"Subject":"dsfsdfdsfsdf",
"StartTime":"2016-05-31T22:00:00",
"EndTime":"2016-05-31T23:00:00",
"OrganizerEmail":"d@adssad.com",
"OrganizerName":"dsfdsfsdf",
"Pin":"3402",
"BridgeId":null,
"State":null
}
];
/* Iterate all conferences */
for (var i in obj) {
/* Find conference with ID = 8 */
if (obj[i].Id === 8) {
/* Add a new user to the conference */
obj[i].ConferenceUsers.push({
"Id":1111,
"ConferenceId":1,
"Name":null,
"Email":"test@example.com",
"UserName":null,
"PhoneNumber":null,
"ChannelId":null,
"State":null,
"Type":null,
"RecordingId":null
});
break;
}
}
console.log(obj); // output result
您需要执行四个步骤:
conferences
ConferenceUsers
Conferences
会议
对象和会议用户
数组不可见。Knockout不会自动意识到会议
对象内部的任何更改。因此,在第3步和第4步之后,对于knockout,它看起来不会有任何变化:Conferences
数组中仍然有相同的对象
我的建议:
<div class="container" data-bind="foreach: { data: Conferences, as: 'conf' }">
<div class="conf" data-bind="attr: { id : conf.Id }">
<div class="conf-month" data-bind="text: conf.StartTime"></div>
<div class="conf-day" data-bind="text: conf.EndTime"></div>
<div class="add-user">
<input type="tel" data-bind="value: $root.PhoneNumber />
<input type="email" data-bind="value: $root.Email" />
<a id="add-user" title="Add new user" data-bind="attr: { value: conf.Id }, click: $root.addUserToConference">Add</a>
</div>
<div class="conf-users" data-bind="foreach: { data: conf.ConferenceUsers, as: 'user' }">
<div class="conf-user" data-bind="attr: { id: 'confuser-' + user.Id}">
<span data-bind="text: user.Name"></span>
<span data-bind="text: user.PhoneNumber"></span>
<span data-bind="text: user.Email"></span>
</div>
</div>
</div>
</div>
function ConferenceViewModel() {
var self = this;
self.Conferences = ko.observableArray([]);
self.PhoneNumber = ko.observable("");
self.Email = ko.observable("");
self.getAllConfs = function () {
$.ajax({
type: 'GET',
url: '/confs/getconfs',
}).done(function (confs) {
$.each(confs, function (index, conf) {
//populate the list on document ready
confVm.Conferences.push(conf);
};
}).fail(showError);
}
self.addUserToConference = function (viewModel, event) {
var user = {
"Id": 0,
"ConferenceId": viewModel.Id(),
"Email": "self.Email()",
"PhoneNumber": self.PhoneNumber(),
};
// here we should insert a new ConferenceUser into the Conferences observable array
// and also update the DOM
// ajax to insert user to db
}
如果定期向会议添加新用户,我建议创建一个Conference
viewmodel,其中包含ko.observearray
。或者,您可以为每个微小的更改创建新的Conference
对象,这将触发knockout以重新呈现整个UI,而不仅仅是相关部分(假设您在某处使用了foreach
数据绑定)
关于如何将常规会议
对象映射到viewmodels的快速示例:
//来自ajax请求的JSON数据(对象数组)
var conferencesData=[];
var会议=功能(conferenceJSON){
//最好单独映射您正在使用的所有属性,
//但这至少暴露了原始JSON对象
this.props=conferenceJSON;
this.users=ko.observearray(conferenceJSON.conferenceUsers);
};
var createConference=函数(conferenceJSON){
返回新会议(conferenceJSON);
};
var ConferenceList=函数(conferencesJSON){
var self=这个;
this.conferences=ko.observearray(conferencesJSON.map(createConference));
this.addConference=函数(conferenceJSON){
self.conferences.push(createConference(conferenceJSON));
};
this.addUserToConference=函数(userJSON){
var conferences=self.conferences();
对于(var c=0;c<0.length;c+=1){
//步骤2:查找具有所需id的会议
if(会议[c].props.id==用户JSON.ConferenceId){
//第三步:我们正在推进一个可观察的轨道,所以没有必要
//担心第四步。
会议[c].users.push(userJSON);
返回true;
}
}
返回false;
};
};
ko.应用绑定(新会议列表(会议数据))代码>您需要执行四个步骤:
从可观察数组中获取当前会议列表conferences
找到具有正确id的会议
将新用户推送到本次会议的ConferenceUsers
确保使用新数据设置了Conferences
虽然所有步骤都很容易执行,但它们的工作方式会有一些缺点:
会议
对象和会议用户
数组不可见。Knockout不会自动意识到会议
对象内部的任何更改。因此,在第3步和第4步之后,对于knockout,它看起来不会有任何变化:Conferences
数组中仍然有相同的对象
我的建议:
<div class="container" data-bind="foreach: { data: Conferences, as: 'conf' }">
<div class="conf" data-bind="attr: { id : conf.Id }">
<div class="conf-month" data-bind="text: conf.StartTime"></div>
<div class="conf-day" data-bind="text: conf.EndTime"></div>
<div class="add-user">
<input type="tel" data-bind="value: $root.PhoneNumber />
<input type="email" data-bind="value: $root.Email" />
<a id="add-user" title="Add new user" data-bind="attr: { value: conf.Id }, click: $root.addUserToConference">Add</a>
</div>
<div class="conf-users" data-bind="foreach: { data: conf.ConferenceUsers, as: 'user' }">
<div class="conf-user" data-bind="attr: { id: 'confuser-' + user.Id}">
<span data-bind="text: user.Name"></span>
<span data-bind="text: user.PhoneNumber"></span>
<span data-bind="text: user.Email"></span>
</div>
</div>
</div>
</div>
function ConferenceViewModel() {
var self = this;
self.Conferences = ko.observableArray([]);
self.PhoneNumber = ko.observable("");
self.Email = ko.observable("");
self.getAllConfs = function () {
$.ajax({
type: 'GET',
url: '/confs/getconfs',
}).done(function (confs) {
$.each(confs, function (index, conf) {
//populate the list on document ready
confVm.Conferences.push(conf);
};
}).fail(showError);
}
self.addUserToConference = function (viewModel, event) {
var user = {
"Id": 0,
"ConferenceId": viewModel.Id(),
"Email": "self.Email()",
"PhoneNumber": self.PhoneNumber(),
};
// here we should insert a new ConferenceUser into the Conferences observable array
// and also update the DOM
// ajax to insert user to db
}
如果定期向会议添加新用户,我建议创建一个Conference
viewmodel,其中包含ko.observearray
。或者,您可以为每个微小的更改创建新的Conference
对象,这将触发knockout以重新呈现整个UI,而不仅仅是相关部分(假设您在某处使用了foreach
数据绑定)
关于如何将常规会议
对象映射到viewmodels的快速示例:
//来自ajax请求的JSON数据(对象数组)
var conferencesData=[];
var会议=功能(conferenceJSON){
//最好单独映射您正在使用的所有属性,
//但这至少暴露了原始JSON对象
this.props=conferenceJSON;
this.users=ko.observearray(conferenceJSON.conferenceUsers);
};
var createConference=函数(conferenceJSON){
返回新会议(conferenceJSON);
};
var ConferenceList=函数(conferencesJSON){
var self=这个;
this.conferences=ko.observearray(conferencesJSON.map(createConference));
this.addConference=函数(conferenceJSON){
self.conferences.push(createConference(conferenceJSON));
};
this.addUserToConference=函数(userJSON){
var conferences=self.conferences();
对于(var c=0;c<0.length;c+=1){
//步骤2:查找具有所需id的会议
if(会议[c].props.id==用户JSON.ConferenceId){
//第三步:我们正在推进一个可观察的轨道,所以没有必要
//担心第四步。
会议[c].users.push(userJSON);
返回true;
}
}
返回false;
};
};
ko.应用绑定(新会议列表(会议数据))代码>似乎无法理解每件事应该如何工作。。。我已经用剩下的细节更新了我的帖子。你能更新你的帖子吗?你仍然需要添加一个observearray
来存储用户。我在这里举了一个有效的例子:你需要的最重要的东西