As an experienced CMS website operation personnel, I know the importance of template design for website content display and user experience.During the process of content creation, editing, and publishing, we often deal with templates. Understanding the correct usage of template tags, especially the closing requirements for conditional judgment and loop control tags, is the basis for ensuring the correct rendering of content and the stable operation of the website.

Regarding whether the condition judgment and loop control tags in the template must have end tags, the template engine of AnQi CMS follows clear conventions. According to the template making conventions document we provide,Conditional judgment, loop control, and other tags must have corresponding end tags, which appear in pairsThis means, whether it is used for logical judgment,{% if %}Label, or used for data iteration.{% for %}Labels, all need a clear closing tag to define their scope.

For example, when we use{% if 条件 %}Performing conditional judgment, the corresponding logical code block must end with{% endif %}If there is{% elif %}or{% else %}branches, they are also located in the mainifandendifBetween them, they form a complete conditional judgment structure.This design ensures that the template parser can clearly identify the start and end of each condition branch, avoiding logical ambiguity.

Similarly, for{% for item in 集合 %}such loop control labels, it also needs to be passed through{% endfor %}Define the boundaries of the loop. This is crucial for handling list data and dynamically generating content. Even when we may need to handle empty collections in the loop, we should use{% empty %}Labels to provide alternative content, also need to be wrapped in{% for %}and{% endfor %}within this pair of tags.

This mandatory closing tag design is not only reflected in conditional judgment and loop control, but is also widely used in many other block-level tags of the security CMS, such as obtaining the navigation list.{% navList %}Required{% endnavList %}，get document list{% archiveList %}Required{% endarchiveList %}etc.It brings obvious benefits: first, it greatly enhances the readability and maintainability of template code, allowing developers to clearly understand the logic scope of code blocks at a glance; second, it effectively avoids parsing errors and page rendering anomalies caused by unclosed tags; finally, this paired tag style is consistent with many mainstream template engines (such as Django, Blade, etc.), which reduces the learning cost for developers.

Therefore, it is crucial to always remember and correctly use these paired tags when developing templates and managing content in the Anqi CMS.It ensures the accurate presentation of our high-quality content and lays a solid foundation for the stable operation of the website.

Common Questions and Answers (FAQ)

  • If I forget to add{% endif %}or{% endfor %}What will happen if the end tag is missing?If the end tag of a conditional judgment or loop control tag in the template is missing, the template engine of Anqí CMS will encounter a syntax error during parsing.This usually causes the page to fail to render properly, the browser may display error messages, or the page content may be incomplete or disorganized.System logs will also record the corresponding parsing errors,提示标签未正确闭合。

  • Are there any tag types in the Anqi CMS template that do not require an end tag?Yes, there are some tags in the template that do not require explicit closing tags. There are mainly two cases: one is the double curly bracket syntax used for direct output of variables, for example{{ 变量 }}The first is certain auxiliary tags for single executions, such as{% lorem %}Used to generate random text, or{% system %}/{% contact %}Labels are directly used to obtain and output the value of a single field.However, once these tags are designed to wrap a content block, or to define a variable that needs to be used within the block, they will require a corresponding end tag.

  • Why does Anqi CMS strictly require the use of closing tags for these tags?Forced use of closing tags is a common design pattern in modern template engines, aimed at improving the robustness and maintainability of template code.This design clearly defines the scope of logical code blocks, reducing errors caused by ambiguous syntax.It helps developers better understand complex template structures, facilitates teamwork and future code iterations.At the same time, this is also consistent with the concept of the Anqi CMS template engine借鉴ing the syntax of mature frameworks such as Django, providing users with a familiar and standardized development experience.