考虑一个骨干应用程序,它具有select
类别列表,以及一个下面的文件表。所有文件,无论它们属于哪个类别,都在App.collection.files
集合中。当用户选择新类别时,我想过滤表格以仅显示那些匹配的文件。
我想在客户端完全这样做。每次选择新类别时,我都不想从服务器获取新的文件列表。
我打算在App.collection.files.where({category_id: xx})
内App.View.Files.render()
来完成过滤。
触发/响应事件以使其正常工作的最佳Backbone-y方式是什么?
我正在玩的一个想法是另一个包含过滤文件的集合,但不确定这是否是最好的方法。
App.View.FilesPage = Backbone.View.extend({
template: App.utils.template('files-page'),
className: 'container-fluid',
initialize: function(){
this.render();
},
render: function(){
this.$el.html(this.template());
this.$el.find('.categories').append(
new App.View.Categories({collection:App.collection.categories}).el
);
this.$el.find('.files table').append(
new App.View.Files({collection:App.collection.files}).el
);
return this;
}
});
App.View.Categories = Backbone.View.extend({
tagName: 'select',
events: {
'change': 'onChange'
},
initialize: function(){
this.$el.attr('size', this.collection.length + 1);
this.render();
},
render: function(){
var option = function(value, text, isSelected){
return $('<option></option>', {'value':value, 'text':text});
};
this.$el.html(option(0, 'All Documents'));
this.$el.append(
this.collection.invoke(function(){
return option(this.get('category_id'), this.get('title'));
})
).val(0);
return this;
},
onChange: function(event){
}
});
App.View.Files = Backbone.View.extend({
tagName: 'tbody',
initialize: function(){
this.render();
},
render: function(){
this.$el.html(
this.collection.invoke(function(){
return new App.View.File({model:this}).el;
})
);
return this;
}
});
答案 0 :(得分:0)
这是我提出的一个解决方案,表面看起来很精致和花哨。
在评论中调出代码更改。
对此解决方案的想法,以及完全不同的解决方案是受欢迎的。
App.View.FilesPage = Backbone.View.extend({
template: App.utils.template('files-page'),
className: 'container-fluid',
initialize: function(){
// CHANGE: Store application wide reference to 'Categories' model
App.model.categories = new App.Model.Categories();
this.render();
},
render: function(){
this.$el.html(this.template());
this.$el.find('.categories').append(
new App.View.Categories({
// CHANGE: Pass model into 'Categories' view
model: App.model.categories,
collection: App.collection.categories
}).el
);
this.$el.find('.files table').append(
new App.View.Files({collection:App.collection.files}).el
);
return this;
}
});
App.View.Categories = Backbone.View.extend({
tagName: 'select',
events: {
'change': 'onChange'
},
initialize: function(){
this.$el.attr('size', this.collection.length + 1);
this.render();
},
render: function(){
var option = function(value, text, isSelected){
return $('<option></option>', {'value':value, 'text':text});
};
this.$el.html(option(0, 'All Documents'));
this.$el.append(
this.collection.invoke(function(){
return option(this.get('category_id'), this.get('title'));
})
).val(0);
return this;
},
onChange: function(){
// CHANGE: Update attribute within 'Categories' model
this.model.set('category_id', this.$el.val());
}
});
App.View.Files = Backbone.View.extend({
tagName: 'tbody',
initialize: function(){
this.collection.on('reset', this.render, this);
// CHANGE: Listen for change on 'Categories' model, and re-render this view
App.model.categories.on('change:category_id', this.render, this);
this.render();
},
render: function(){
this.$el.html(
_.invoke(this.getFilteredFiles(), function(){
return new App.View.File({model:this}).el;
})
);
return this;
},
// CHANGE: Return a filtered set of models from collection, based on 'Categories' model attributes
getFilteredFiles: function(){
var categoryId = App.model.categories.get('category_id');
if (categoryId!=0){
return this.collection.where({'category_id': categoryId});
}
else{
return this.collection.models;
}
}
});