我想知道如何基于type ='number'框创建一些文本框...所以只要有人在数字框中加1,另一个文本框字段就会附加到backbone.js查看...然后,当有人在这些文本框中输入值时,将每个值添加到主干模型数组中的某个位置。以下是一些代码:
<label for='choices'># Choices for Students</label>
<input type='number' name='choices' step=1 />
initialize: function(opts) {
this.model = new QuestionCreateModel({
mode: null,
choices: ['A', 'B', 'C'],
Question: "Question goes here",
MaxChoices: 0,
MinChoices: 0,
WordLimit: 0,
CharLimit: 0,
}),
你可以看到,我想取输入type ='number',然后加载文本框,这样我就可以为Backbone模型中的choices数组赋值。
感谢您的帮助!
-Stu
答案 0 :(得分:0)
我认为你的代码不足。
首先,您需要一个集合和一个模型。
然后创建视图,该视图侦听添加,删除,更改或重置集合的事件。如果您这样做,您的视图将处理这些事件并呈现您应该呈现的任何内容。
myView = Backbone.View.extend({
initialize : function() {
this.collection = this.options.collection || new myCollection();
this.collection.on("add remove reset change", this.render, this)
},
events : {
"change [type='number']" : "numberChanged"
},
numberChanged : function(ev) {
var $el = $(ev.target || ev.srcElement);
var model = $el.data("model");
model.set("selectedChoice", $el.val());
},
render : function() {
this.$el.empty();
this.collection.each(function(model) {
$("<yourinput>").data("model", model)
.appendTo(this.$el);
}, this);
}
});
现在您的模型和集合
var myModel = Backbone.Model.extend({
initialize : function() {
this.on("change:selectedChoice", this.onChoiceChanged, this);
},
onChoiceChanged : function(model,value) {
// from here you know, that a value was selected, you now
// can say the collection, it should create a new model
if (this.collection) this.collection.push();
// this will trigger a "add" event and your "view" will react and rerender.
}
});
var myCollection = Backbone.Collection.extend({
model : myModel
});