In the template development of Anqi CMS and daily content operations, we often encounter the need to dynamically display information based on specific attributes or keywords of the content.In order to achieve personalized content recommendations, emphasize the specific themes of articles, or control the display of page elements based on certain indicators in the data, accurately determining whether a string or array contains a specific keyword is a very practical skill.

The Anqi CMS template system uses a syntax similar to the Django template engine, built-in with rich filters and tags, which can help us easily achieve such judgments.Next, we will delve into how to determine whether a string or array in the Anqi CMS template contains specific keywords, and provide some practical methods and scenario examples.

UsecontainFilter for keyword judgment

In the AnQi CMS template, the most direct and commonly used method is to use the built-incontainA filter. This filter is used to detect whether a string or an array (slice) contains a specified keyword. Its return value is a boolean type (TrueorFalse), very suitable for conditional judgment tags{% if %}Combine usage.

Basic usage:

{{ obj|contain:关键词 }}

Among them,objCan be a string variable or an array variable关键词which is the specific string you want to find.

Example 1: Determine if a string contains a keyword

Suppose we pass througharchiveDetailTag to get the title of an articlearchive.Title, and hope to determine if it contains the word 'tutorial':

{% set articleTitle = archive.Title %} {# 假设 archive.Title 的值为 "安企CMS模板制作教程" #}

{% if articleTitle|contain:"教程" %}
    <p>这篇文章标题中包含了“教程”字样，这可能是一个入门指导！</p>
{% else %}
    <p>这篇文章标题中未包含“教程”字样。</p>
{% endif %}

In the above example, ifarticleTitlethe content is "Anqi CMS template creation tutorial", then the conditionarticleTitle|contain:"教程"It will returnTrueand display the corresponding prompt message.

Example two: Determine if an array contains a specific element

Sometimes, data exists in the form of an array, such as a list of Tag tags in an article. We can usetagListLabel to get the Tag list and then judge whether a specific Tag exists:

{% tagList tags with itemId=archive.Id %} {# 假设 tags 数组包含 ["网站优化", "SEO", "内容营销"] #}

{% if tags|contain:"SEO" %}
    <span class="highlight-tag">本文专注于SEO优化</span>
{% else %}
    <span>本文未涉及SEO优化</span>
{% endif %}

{% endtagList %}

In this scenario,tagsThe variable is an array containing multiple strings.tags|contain:"SEO"It will check if there is an element with the value 'SEO' in the array.

Example three: Determine if there is a specific key name in the key-value pair (Map/Struct).

containThe filter can also be used to determine if a specific key (key) exists in the key-value pair (or structure).This is very useful when handling custom fields in the background or some configuration data.

{% set extraParams = archive.Extra %} {# 假设 extraParams 是一个包含自定义字段的Map，如 { "author": "张三", "source": "官网" } #}

{% if extraParams|contain:"author" %}
    <p>作者：{{ extraParams.author }}</p>
{% else %}
    <p>未指定作者信息。</p>
{% endif %}

Here, extraParams|contain:"author"Will checkextraParamsDoes it exist namedauthorkey?

Other methods of judgment keywords:indexandcountFilter

exceptcontainOutside the filter,indexandcountThe filter can also indirectly help us judge whether a string or array contains a specific keyword and provide more detailed information.

1.indexFilter: Get the position of a keyword

indexThe filter will return the first occurrence position (index) of a keyword in a string or array, if not found then it will return-1We can use this feature to determine if a keyword exists.

Basic usage:

{{ obj|index:关键词 }}

Example: Combineindexthe judgment.

{% set articleContent = archive.Content %} {# 假设内容中包含 "安企CMS是一款高效的CMS系统" #}

{% if articleContent|index:"高效" > -1 %}
    <p>内容中提到了“高效”，首次出现在第 {{ articleContent|index:"高效" }} 个字符处。</p>
{% else %}
    <p>内容中未提及“高效”。</p>
{% endif %}

IfindexThe returned value is greater than-1This means that the keyword exists. This method is suitable for scenarios where you are not only concerned about the existence of the keyword, but also about the position of its first occurrence.

2.countFilter: Calculate the number of times a keyword appears

countThe filter can count the number of times a keyword appears in a string or array. If the count is greater than0, it indicates that the keyword exists.

Basic usage:

{{ obj|count:关键词 }}

Example: Combinecountthe judgment.

{% set articleContent = archive.Content %} {# 假设内容中包含 "安企CMS是一款高效的CMS系统，安企CMS致力于提供高效解决方案。" #}
{% set cmsCount = articleContent|count:"CMS" %}

{% if cmsCount > 0 %}
    <p>内容中提到了“CMS”共 {{ cmsCount }} 次。</p>
{% else %}
    <p>内容中未提及“CMS”。</p>
{% endif %}

WhencountThe number returned by the filter is greater than0This indicates that the keyword exists. This method is very useful when it is necessary to understand the frequency of keyword occurrence.

The application scenario: making content more intelligent and expressive

These keyword judgment functions are widely used in the operation of actual websites and template design:

  • Display recommended icon or corner mark dynamically:For example, if the product title contains "new" or "special offer", an "new launch" or "time-limited offer" corner mark can be automatically added to the product image.
  • Personalized content guidance:Based on the content of the article the user is browsing (for example, if the article title or keywords contain "Go language"), recommend more tutorials or related products about Go language in the sidebar.
  • Template style control:If the body of the article contains certain specific phrases (such as "Click here to download"), these phrases can be applied special CSS styles to make them more prominent.
  • List content filtering and grouping:In the background custom list, by judging whether a custom field contains a specific value, to conditionally filter or group the list items displayed on the front end.
  • Targeted advertising or marketing information:Dynamically insert relevant advertising or promotional information based on page theme or content keywords to improve conversion rates.

Details to pay attention to.

When using these filters, there are several details that are worth noting:

  • Case Sensitive:By default,contain/indexandcountFilters are allCase sensitiveThis means that "CMS" and "cms" are treated as different keywords.If you need to perform a case-insensitive judgment, you need to convert both the source string and the keyword to the same case (such as lowercase) before making the judgment, for example{% if articleTitle|lower|contain:"cms" %}.
  • Data source:Ensure that the data you provide to the filter (string or array) is correct. Typically, these data come from various tags of Anqie CMS, such asarchiveDetailreturnedarchive.Title/archive.ContentOrarchiveListin the loopitem.Keywordsetc.
  • Performance consideration: For most websites and content volume, use these in the template