How to truncate the title of the article and automatically add an ellipsis in the AnQiCMS template?

In Anqi CMS template design, for the beauty of the page and the unity of layout, we often need to truncate the article title and automatically add an ellipsis after truncation.AnQiCMS provides a simple and efficient template filter to meet this requirement, making content display more flexible.

The core principle: Understanding AnQiCMS template filters

In the AnQiCMS template system, with its powerful Django-like template engine, we can conveniently use 'filters' to process and format data.These filters can process variables, such as changing case, formatting time, or what we are currently concerned with - truncating strings.

AnQiCMS provides character truncation and ellipsis addition for article titles,truncatecharsFilter. Its function is: when the number of characters in a string exceeds a specified length, it will automatically truncate the extra characters and add...an ellipsis. It is worth noting that,truncatecharsWhen calculating the character count, the automatically added ellipsis is included.

The basic syntax of the filter is as follows:{{ 变量 | 过滤器名称 : 参数 }}

Here, 变量It refers to the string you want to truncate (such as an article title),过滤器名称That istruncatecharswhile参数which is the maximum number of characters you want to keep.

Practice Exercise: Applying Title Truncation in Templates

Next, let's see how to truncate article titles in AnQiCMS templates through specific template code examples.

Scene one: Article list page title truncation

On the article list page of the website (such as the latest articles on the homepage, category article lists, etc.), the title usually needs to be kept within a certain length to avoid layout confusion. At this time,archiveListLabel collaborationtruncatecharsThe filter is an ideal choice.

Suppose we want to display article titles in a list and limit their length to 30 characters:

{# 假设我们正在循环输出文章列表，变量名为 archives #}
{% archiveList archives with type="list" limit="10" %}
    {% for item in archives %}
    <li>
        <a href="{{item.Link}}">
            {# 对文章标题 item.Title 进行字符截断，并限制在 30 个字符以内 #}
            <h5>{{item.Title | truncatechars:30 }}</h5>
            <div>{{item.Description}}</div>
            {# ... 其他文章信息 ... #}
        </a>
    </li>
    {% empty %}
    <li>
        当前没有可展示的文章。
    </li>
    {% endfor %}
{% endarchiveList %}

In this example,item.TitleIs the article title we have obtained. Through| truncatechars:30The system will automatically check the title length, if it exceeds 30 characters, it will be truncated from the 27th character and appended with...The final length is 30 characters.

Scenario two: Truncation of a single article title (non-list scenario)

Although on the article detail page, the full title is usually displayed, under certain special layouts, such as page sidebars or custom modules, it is also possible to use the concise version of the current article title.truncatecharsfilter.

Assume that in a sidebar module, it is necessary to display the title of the current page article and limit it to 20 characters:

{# 获取当前文章的详情，假定变量 archive 已可用 #}
{# 如果 archive 未直接可用，可以使用 archiveDetail 标签获取，例如：
   {% archiveDetail currentArchive with name="Title" %}
   <h3>{{ currentArchive | truncatechars:20 }}</h3>
#}
<div>
    <h3>{{archive.Title | truncatechars:20 }}</h3>
    <p>{{archive.Description | truncatechars:50 }}</p>
</div>

here,archive.TitleRepresents the title of the current article. Similarly,| truncatechars:20Ensure the title is displayed within 20 characters and automatically adds an ellipsis.

Additional hint: Handle titles containing HTML.

Although the title of an article is usually plain text, if the content of your website or the 'title' of some special fields may contain HTML tags (for example, through custom field input), use it directlytruncatecharsIt may destroy the HTML structure. For this kind of situation, AnQiCMS providestruncatechars_htmlFilter. It intelligently tries to maintain the integrity of HTML tags during truncation, preventing unclosed tags.

At the same time, in order to ensure that the content containing HTML can be parsed correctly by the browser rather than displayed as plain text, it usually needs to be paired with|safefilter.

{# 假设 item.RichTitle 是一个可能包含 HTML 的标题 #}
<h5>{{item.RichTitle | truncatechars_html:50 | safe }}</h5>

In this example,truncatechars_html:50Truncates the title to 50 characters while preserving the HTML structure and adds an ellipsis.| safeThen tell the template engine that this content is safe HTML and does not need to be escaped.

Points to note

• Choose an appropriate truncation length:The length of the truncation needs to be determined based on the actual page design and reading habits.Too short may not provide enough information, too long may lose the significance of truncation.It is recommended to perform more testing and adjustment in the actual environment.
• Chinese character processing:AnQiCMS is developed based on the Go language, and its string processing naturally supports Unicode. This meanstruncatecharsThe filter correctly counts a Chinese character as one character when processing Chinese characters, and it will not truncate half of a Chinese character.
• SEO considerations:Although truncating the article title is mainly for the beauty of the front-end display, but remember, the page'stitleTags (usually set through TDK tags) should contain a complete, search engine optimized title.The truncation in templates usually only affects local displays such as lists or cards, rather than the core SEO title of the page.

By reasonably using the AnQiCMS providedtruncatecharsA filter that allows us to easily implement automatic character truncation and ellipsis addition for article titles, thus optimizing the visual presentation and user experience of the website.

Frequently Asked Questions (FAQ)

1. How to customize the ellipsis character that appears after truncation?...It can be set to other symbols, such as... [更多]? Answer:in the AnQiCMS providedtruncatecharsfilter, the ellipsis (...) is part of the built-in behavior, the documentation does not mention any parameters to directly configure or modify the default ellipsis character. If you need to customize the content after the ellipsis, you may need to use more complex template logic (such as using ifConditionally judge the length of the string, then manually concatenate the truncated content with a custom suffix), or consider using a custom template function to implement it, although this usually goes beyond the functionality provided by a simple filter.

2. Ask: If my article title already contains HTML tags, can I use them directly?truncatecharsWill there be a problem if I truncate it? Answer:Yes, if the article title contains HTML tags (for example,<strong>我的标题</strong>Please use directlytruncatecharsThe filter may truncate tags directly based on character count, which can destroy the HTML structure and affect page rendering. To avoid this situation, AnQiCMS providestruncatechars_htmlThe filter tries to maintain the integrity of HTML tags when truncating. It is used intruncatechars_htmlit is usually necessary to coordinate with|safe