[英]How do I access to a variable inside a model view from an external file
Hi I have a basic question related to my Backbone code. 嗨,我有一个与我的Backbone代码有关的基本问题。
I first initialize 4 SpinnerView in a file called js.js. 我首先在一个名为js.js的文件中初始化4 SpinnerView。 In my main code file called app.js I declare the model views and inside each view there is a model called Spinner.
在名为app.js的主代码文件中,我声明了模型视图,每个视图中都有一个名为Spinner的模型。 Inside each Spinner there is a collection called WordCollection and inside the collection there are models called Word.
在每个Spinner内部,都有一个称为WordCollection的集合,并且在该集合内有称为Word的模型。
The question is, how do I access to "test" variable inside SpinnerView, only in one of the 4 renders (ie the 3rd SpinnerView render) from the file js.js. 问题是,如何仅在文件js.js的4个渲染之一(即第3个SpinnerView渲染)中访问SpinnerView内部的“ test”变量。
All help will be appreciated. 所有帮助将不胜感激。 Thanks!
谢谢!
Here is a sample of my code in the file where I render the Spinners: 这是渲染Spinners的文件中的代码示例:
//file js.js
(new SpinnerView()).render();
(new SpinnerView()).render();
(new SpinnerView()).render();
(new SpinnerView()).render();
And here is a sample of my code from my main code file: 这是我的主代码文件中的代码示例:
//file app.js
(function($) {
// model word
window.Word = Backbone.Model.extend({
url: 'save.php',
defaults: {
word: '',
}
});
//collection word
window.WordCollection = Backbone.Collection.extend({
model: Word
});
// spinner model
window.Spinner = Backbone.Model.extend({
url: '/beta/save.php',
wordCollection: null,
defaults: {
title: 'title',
},
initialize: function() {
this.wordCollection = new WordCollection();
},
addWord: function(bs) {
this.wordCollection.add(bs);
}
});
// spinner view
window.SpinnerView = Backbone.View.extend({
template: null,
spinner: null,
el: '',
test: false, //<---- THIS IS THE VARIABLE I WANT TO ACCESS
initialize: function() {
_.bindAll(this, 'focusAddWord', 'addWord', 'onEnterAddWord', 'focusSetTitle', 'setTitle', 'onEnterSetTitle');
this.template = _.template($('#spinner-template').text());
this.spinner = new Spinner();
},
render: function() {
var el = $(this.template()).appendTo('.spinners');
this.setElement(el);
},
focusAddWord: function() {
this.$el.find('.add-word-input input').val('');
this.$el.find('.add-word-input input').focus();
},
addWord: function() {
var word = new Word();
var val = this.$el.find('.add-word-input input').val();
// validate minimum characters
if(this.$el.find('.add-word-input input').val().length > 0){
// go on
this.spinner.addWord({
word: val,
});
word.set({
word: val,
});
word.toJSON();
word.save();
this.$el.find('.add-word-input').hide();
this.renderWordCollection();
}
this.$el.find('.add-word-input').hide();
},
onEnterAddWord: function(ev) {
if (ev.keyCode === 13) {
this.$el.find('.add-word-input input').trigger('blur');
this.$el.find('.viewbox').trigger('click');
}
},
focusSetTitle: function() {
this.$el.find('.set-title-input input').val('');
this.$el.find('.set-title-input input').focus();
this.$el.find('.set-title-input input').addClass('input-active');
},
setTitle: function() {
var val = this.$el.find('.set-title-input input').val();
if(this.$el.find('.set-title-input input').val().length > 0){
// go on
this.spinner.set('title', val);
this.spinner.toJSON();
this.spinner.save();
}
},
onEnterSetTitle: function(ev) {
if (ev.keyCode === 13) {
this.$el.find('.set-title-input input').trigger('blur');
}
},
// call after adding a word to spinner.
renderWordCollection: function() {
var wc = this.spinner.wordCollection;
var ListTemplate = _.template($('#word-collection-template').html(),{wc: wc});
this.$el.find('ul').html(ListTemplate);
}
});
})(jQuery);
It's not entirely clear what you want to do with test
, but to use it as an instance variable simply initialize it: 尚不清楚您要对
test
做什么,但是要将其用作实例变量只需对其进行初始化:
window.SpinnerView = Backbone.View.extend({
// code removed for brevity
test: false, //<---- THIS IS THE VARIABLE I WANT TO ACCESS
initialize: function() {
_.bindAll(this, 'focusAddWord', 'addWord', 'onEnterAddWord', 'focusSetTitle', 'setTitle', 'onEnterSetTitle');
this.template = _.template($('#spinner-template').text());
this.spinner = new Spinner();
this.test = false, //<---- PUT IT HERE
},
Then, you can access it from within function inside the view: 然后,您可以从视图内部的函数中访问它:
focusAddWord: function() {
console.log(this.test);
this.$el.find('.add-word-input input').val('');
this.$el.find('.add-word-input input').focus();
},
And you can also access it from outside: 您还可以从外部访问它:
var view = new SpinnerView();
view.render();
console.log(view.test);
And modify it: 并修改它:
view.test = true;
In addition, don't forget you can pass options when instanciating a view: 另外,不要忘了在实例化视图时可以传递选项:
initialize: function(options) {
_.bindAll(this, 'focusAddWord', 'addWord', 'onEnterAddWord', 'focusSetTitle', 'setTitle', 'onEnterSetTitle');
this.template = _.template($('#spinner-template').text());
this.spinner = new Spinner();
// use an empty `options` object if none is provided, fallback to `false` default
this.test = (options || {}).mustBeTested || false,
},
// ...
focusAddWord: function() {
if(this.test){
// do something when the view needs to be tested
}
this.$el.find('.add-word-input input').val('');
this.$el.find('.add-word-input input').focus();
},
You then simply pass options as appropriate: 然后,您可以根据需要简单地传递选项:
(new SpinnerView()).render();
(new SpinnerView()).render();
(new SpinnerView({ mustBeTested: true })).render();
(new SpinnerView()).render();
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