使用 Django 模板过滤器限制字符数 [英] Limit number of characters with Django Template filter

问题描述

我正在尝试输出项目列表中描述的前 255 个字符，并且正在寻找一种方法来获取它.

I am trying to output the first 255 characters of a description on a list of items and am looking for a method to get that.

示例:我有一个包含 300 个左右字符的变量.

Example: I have a variable that contains 300 or so characters.

我这样称呼那个变量，{{ my_variable|characterlimit:255 }}

它只会返回该变量的前 255 个字符.

and it would return only the first 255 characters of that variable.

如果这个标签不存在，我会简单地创建它(并建议它进入 django)，但我想在我花时间这样做之前确保它不存在.谢谢！

If this tag doesn't exist, I will simply create it (and suggest that it goes into django), but I wanted to make sure it didn't before I took the time to do that. Thanks!

推荐答案

如果my_variable"是一个字符串，你可以利用 切片过滤器，将字符串视为字符列表.如果是一组单词，粗略的等效项是 truncatewords- 但这听起来并不完全符合您的需要.

If the "my_variable" is a string, you can take advantage of the slice filter, which treats the string as a list of characters. If it's a set of words, the rough equivilant is truncatewords - but that doesn't quite sound like your need.

truncatewords还在截断结果的末尾添加一个省略号 ....

truncatewordsalso adds an ellipsis ... at the end of the truncated result.

用法类似于

{{ my_variable|slice:":255" }}

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