TypeError:无效的"in"操作数n [英] TypeError: invalid 'in' operand n

问题描述

在萤火虫中，我遇到了一个错误，它告诉我在underscore.min.js中是类型错误

In the firebug, I have got an error, it told me that it's a type error in the underscore.min.js

当我推荐month.js中的错误行时，没有错

when I commended out the error line in the month.js, there is nothing wrong

我不知道自己犯了什么错误，已经检查了monthCollection，并确定monthCollection是正确的

I don't know what mistake I have made, I have checked the monthCollection and I'm sure the monthCollection is right

我无法访问DayView的初始化，日志没有成功"，而只有一行开始创建新的日视图"

I couldn't access the initialize of DayView, the log has no 'success' but just one line 'begin to new a day view'

js/views/month.js

js/views/month.js

define([
  'backbone',
  'underscore',
  'views/day'
], function(Backbone, _, DayView) {
  'use strict';

  var MonthView = Backbone.View.extend({
    initialize: function(el, collection) {
      this.el = el;
      this.monthCollection = collection;

      this.render();
    },

    //draw the month
    render: function() {
      this.monthCollection.each(function(date) {
        var tmpDate = date.get("date");
        var tmpDay = date.get("day");
        console.log("begin to new a day view");
        var dayView = new DayView(tmpDate, tmpDay);  //error
//        this.el.append(dayView.view);
      }, this);
    }
  });

  return MonthView;
});

js/views/day.js

js/views/day.js

define([
  'backbone',
  'underscore'
], function(Backbone, _) {
  'use strict';

  var DayView = Backbone.View.extend({
    dateTemplate: _.template( $('#date-template').html() ),

    initialize: function(date, day) {
      console.log("success");
      this.date = date;
      switch(day) {
        case 0:
          this.day = Sun;
        break;
        case 1:
          this.day = Mon;
        break;
        case 2:
          this.day = Tue;
        break;
        case 3:
          this.day = Wen;
        break;
        case 4:
          this.day = Thu;
        break;
        case 5:
          this.day = Fri;
        break;
        case 6:
          this.day = Sat;
        break;
        default:
          this.day = fail;
      }

      this.render();
    },

    //draw the day to this.view
    render: function()  {
      this.view = this.dateTemplate({
        date: this.date,
        day: this.day
      });
    }
  });

    return DayView;
});

推荐答案

这个错误曾经发生在我身上，因为我将参数作为字符串而不是作为对象传递给视图.

This error once happened to me because I passed the parameter to the view as a string instead as a object.

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