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我的示例应用程序中有两个单独的集合。我想要做的是将userId的集合联合起来。我通常在渲染级别处理过，但是我真的想要在集合级别解析数据，并且如果您愿意并简单地将数据传递给我的下划线模板，渲染将变得“哑巴”。骨干集合 - 集合级别的Union 2集合
我遇到了几个线程，在这个答案中，但我无法在集合级别完成此操作。
我已经在这里设置了一个plunker来更好地描述情况。 http://plnkr.co/edit/UCAFycdmsLaD14cYgTdZ?p=preview
首先，我对用户集合进行提取以获取所有userId和用锻炼集合解决的信息。
users.json
[
{
"user" : 53,
"firstname" : "Todd",
"lastname" : "Jones",
"email" : "[email protected]",
"avatar" : ""
},
{
"user" : 53,
"firstname" : "Sarah",
"lastname" : "Thomas",
"email" : "[email protected]",
"avatar" : ""
}
]
tracker.json
[
{
"user" : 53,
"distance" : 3,
"duration" : 180000,
"date" : "November 27, 2014 09:45:00",
"felt" : "Tired at first"
},
{
"user" : 53,
"distance" : 3.256,
"duration" : 978600,
"date" : "November 28, 2014 10:15:00",
"felt" : "Great"
}
]
我已经在这个线程看到几个例子How do I union/merge two Collections by their 'id' using UnderscoreJS
不过我相信我的问题是，我正在尝试访问WorkoutCollectio中的UserCollection n不正确，或者我没有将其解析为JSON对象（这发生在渲染函数中）。
整个代码低于和plunker在这里http://plnkr.co/edit/UCAFycdmsLaD14cYgTdZ?p=preview
预先感谢任何见解。
// Users Model
var Users = Backbone.Model.extend({
defaults: function() {
return {
avatar: "" // generic Avatar if none supplied by users
};
}
});
// Workouts Collection
var UserCollection = Backbone.Collection.extend({
model : Users,
url: '/data/users.json',
parse: function (responses) {
return responses;
}
});
// Workouts Model
var Workouts = Backbone.Model.extend({
defaults: function() {
return {
felt: "Good"
};
},
});
// Workouts Collection
var WorkoutCollection = Backbone.Collection.extend({
model : Workouts,
url: '/data/tracker.json',
parse: function (responses) {
var data = [];
_.each(responses, function(response){
// format durations
var x = response.duration;
var d = moment.duration(x, 'milliseconds');
var hours = Math.floor(d.asHours());
var mins = Math.floor(d.asMinutes()) - hours * 60;
var seconds = Math.floor(d.asSeconds()) - mins * 60;
var duration = "";
if (hours > 0) {
duration += hours + " hours ";
}
if (mins > 0) {
duration += mins + " minutes ";
}
if (seconds > 0) {
duration += seconds + " seconds ";
}
response.duration = duration;
// format workout dates
var y = response.date;
var z = moment(y).format('dddd, MMM Do YYYY');
response.date = z;
});
var result = [];
_.each(responses, function(el){
console.log(el)
console.log(UserCollection.get("user"))
_.extend(el,_.where(UserCollection, {user: el.user})[0] || {});
result.push(el);
});
console.log(result);
return responses;
}
});
// Main
var ExerciseApp = Backbone.View.extend({
el: "#exercise_app",
template: null,
initialize: function() {
this.userCollection = new UserCollection();
this.listenTo(this.userCollection, "reset sync remove", this.usersLoaded);
this.userCollection.fetch({dataType: "json"});
},
usersLoaded: function() {
this.workoutCollection = new WorkoutCollection();
this.listenTo(this.workoutCollection, "reset sync remove", this.render);
this.workoutCollection.fetch({dataType: "json"});
this.template = _.template($('#workout-table-template').html());
},
render: function() {
var workouts = this.workoutCollection.toJSON();
var users = this.userCollection.toJSON();
this.$el.html(this.template({workouts: workouts, users: users}));
},
});
$(document).ready(function() {
var app = new ExerciseApp
});