无法读取未定义的属性'indexOf' [英] Cannot read property 'indexOf' of undefined

问题描述

我正在尝试在jquery中为几个日期选择器设置不同的选项。
我的代码如下所示：

i'm trying to set different options for several datepickers in jquery. My code is looks like this:

{foreach $cart->getItems() as $item}
    {if $item->action->prereservation}
        var disableDates = new Array();
        {if $item->action->hasVariants()}
        disableDates[{!$item->id}] = {$disabledDates[$item->action->id][$item->idVariant]};
        {else}
        disableDates[{!$item->id}] = {$disabledDates[$item->action->id]};
        {/if}

        if (disableDates[{!$item->id}].length !== 0) {
            $(".datepicker_"+'{$item->id}').datepicker({
                maxDate: new Date('{!$item->action->voucherTo|date: Y-m-d}'),
                beforeShowDay: function(date){
                    var string = jQuery.datepicker.formatDate('yy-mm-dd', date);
                    console.log(disableDates[{!$item->id}]) // result is undefined (but not for last iteration)
                    return [ disableDates[{!$item->id}].indexOf(string) == -1 ]
                }
            })
        } else {
            $(".datepicker_"+'{$item->id}').datepicker({
                maxDate: new Date('{!$item->action->voucherTo|date: Y-m-d}'),
            })
        }
    {/if}
{/foreach}

但如果foreach中有多个项目，我的js控制台会显示错误C对于第一次迭代，annot读取属性'indexOf'为undefined，只有last是好的。请问有人可以帮助我吗？

but if there is more than one item in foreach, my js console show error Cannot read property 'indexOf' of undefined for the first iteration, only last is good. Can anybody help me please?

在我的代码中我将模板系统Latte和jquery结合起来。

In my code Im combining template system Latte and jquery.

这是我的浏览器中的最终代码：

This is my final code in browser:

var disableDates = new Array();
        disableDates[777955] = ["2014-07-25","2014-07-26","2014-07-27","2014-07-28","2014-07-29","2014-07-30","2014-07-31"];

        if (disableDates[777955].length !== 0) {
            $(".datepicker_"+'777955').datepicker({
                maxDate: new Date('2014-07-31'),
                beforeShowDay: function(date){
                    var string = jQuery.datepicker.formatDate('yy-mm-dd', date);
                    return [ disableDates[777955].indexOf(string) == -1 ]
                }
            })
        } else {
            $(".datepicker_"+'777955').datepicker({
                maxDate: new Date('2014-07-31'),
            })
        }

感谢您的任何建议

推荐答案

如果你是在循环中这样做，你一直保持压倒一切数组！

If you are doing that in a loop, you keep overriding the array!

var disableDates = new Array();
disableDates[123] = 123;
console.log(disableDates[123]);  //123

var disableDates = new Array();
disableDates[456] = 456;
console.log(disableDates[123]);  //undefined

在创建新数组之前将数组声明移到循环外部或检查它是否存在。

Move the array declaration outside of the loop or check if it exists before creating a new Array.

这篇关于无法读取未定义的属性'indexOf'的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！