如何使用 Twig 的 Intl 扩展提高百分比格式的小数精度? [英] How to increase decimal precision on percentage format using Twig's Intl extension?

问题描述

我有一个 4 位小数，小数位数为 4.(最大值为 0.9999，最小值为 0.0000)

我正在使用 Twig 及其国际扩展.当我想呈现百分比数字时，小数会四舍五入.

{% 设置十进制 = 0.0850 %}{{decimal|localizednumber('decimal','double','fr-fr') }}//将输出0,085"{{decimal|localizednumber('decimal','double','zh-cn') }}//将输出0.085"{{ decimal|localizednumber('decimal','double','ar-bh') }}//将输出٠٫٠٨٥"{{ decimal|localizednumber('percent','double','fr-fr') }}//将输出8%"{{ decimal|localizednumber('percent','double','zh-cn') }}//将输出8%"{{ decimal|localizednumber('percent','double','ar-bh') }}//将输出 "% ٨"

我希望看到法语的 8,5 %、中文的 8.5% 和阿拉伯语的 % ٨٫٥.>

我尝试添加 double 参数，但它不会改变精度.

当我使用 Symfony 时，我试图以数字格式声明 2 位小数:

#config/twig.yaml枝条:#...数字格式:小数点:2

似乎国际扩展覆盖了这些设置.

我知道我可以做类似的事情

{{ (decimal*100)|localizednumber('decimal','double')}}%

但是%符号可以在某些语言的结果之前，在法语中，%符号之前有一个不间断的空格.

你看到我的错误了吗?你有解决办法吗?

解决方案

无法直接使用您正在使用的 Twig Intl 扩展来完成.

它没有设置精度的参数，它只是使用您选择的格式样式实例化 NumberFormatter，并将其用于 format()你的价值.

在此处检查代码.

<小时>

还有另一个扩展程序有更多选项:https://github.com/twigphp/intl-extra

通过这个，您可以指定 NumberFormatter 支持的所有属性，如图 此处.

你会像这样使用它:

{% 设置十进制 = 0.0850 %}{{小数|格式数字(风格=百分比"，语言环境=fr"，{min_fraction_digit:1})}}

<小时>

或者，您可以利用 NumberFormatter 编写自己的扩展.

NumberFormatter::PERCENT 默认使用的模式是 #,##0 %，不包括小数精度.您可以按照这些规则 确实如此.

或者简单地调用 setAttribute(NumberFormatter::MIN_FRACTION_DIGITS, 1) 来指定您感兴趣的最小十进制数.

例如:

$formatter->setAttribute(NumberFormatter::MIN_FRACTION_DIGITS, 1);

最终实现取决于您，如果您需要在 Twig 模板中使用它，您必须创建您自己的(官方 Symfony docs).

在此处查看更多示例.

I have a decimal number with 4 digits and a scale of 4. (Max is 0.9999 and min is 0.0000)

I'm using Twig and its intl extension. When I want to render a percent number, decimals are rounded.

{% set decimal = 0.0850 %}
{{ decimal|localizednumber('decimal','double','fr-fr') }} //WILL OUTPUT "0,085"
{{ decimal|localizednumber('decimal','double','zh-cn') }} //WILL OUTPUT "0.085"
{{ decimal|localizednumber('decimal','double','ar-bh') }} //WILL OUTPUT "٠٫٠٨٥"
{{ decimal|localizednumber('percent','double','fr-fr') }} //WILL OUTPUT "8 %"
{{ decimal|localizednumber('percent','double','zh-cn') }} //WILL OUTPUT "8%"
{{ decimal|localizednumber('percent','double','ar-bh') }} //WILL OUTPUT "% ٨"

I would like to see 8,5 % in French, 8.5% in chinese and % ٨٫٥ in arabic.

I tried to add the double parameter, but it does not change the precision.

As I am using Symfony, I tried to declare 2 decimals in number format:

<!-- lang-yml -->
#config/twig.yaml
twig:
    #...
    number_format:
        decimals: 2

It seems that the Intl extension is overriding these settings.

I know that I can do something like

{{ (decimal*100)|localizednumber('decimal','double')}}% 

But the % symbol can be before the result in some languages, in French, there is a non-breaking space before the % symbol.

Do you see my error? Do you have a solution?

解决方案

Can't be done directly with Twig Intl extension you are using.

It doesn't have a parameter to set the precision, it simply instantiate the NumberFormatter with the formatting style of your choice, and will use that to format() your value.

Check the code here.

---

There is another extension which does have more options: https://github.com/twigphp/intl-extra

With this one you can specify all the attributes supported by NumberFormatter, as shown here.

You would use it like this:

{% set decimal = 0.0850 %}
{{ decimal|format_number(style='percent', locale='fr', {min_fraction_digit: 1}) }}

---

Alternatively, you could write your own extension by leveraging on NumberFormatter.

The pattern that NumberFormatter::PERCENT uses by default is #,##0 %, which does not include decimal precision. You can define your own pattern following these rules so it does.

Or simply call to setAttribute(NumberFormatter::MIN_FRACTION_DIGITS, 1) to specify the the minimum number of decimal numbers you are interested in.

For example:

$formatter->setAttribute(NumberFormatter::MIN_FRACTION_DIGITS, 1);

The final implementation is up to you, and if you'd need to use it within a Twig template you'd have to create your own (official Symfony docs).

See more examples here.

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