When using AnQiCMS for website content management, we often encounter situations where we need to perform refined processing on the strings output by the template.For example, the text obtained from the database may contain unnecessary leading and trailing spaces, or in some specific scenarios, it may be necessary to remove specific symbols from the beginning or end of the string to ensure the neat display of the page and the uniformity of data format.The powerful template engine of AnQi CMS provides a variety of practical filters, which can easily handle these string processing needs.
The template syntax of AnqiCMS is similar to the Django template engine, it is through{{ 变量 | 过滤器 : 参数 }}This format is used to convert or process variable values. For removing specific characters or spaces from the beginning and end of a string, the following filters can be used.trim/trimLeftandtrimRightThese three filters can come in handy.
Firstly, let's understandtrimFilter.It is a very general tool that can help us remove all spaces at the beginning and end of a string.Imagine if there are extra spaces before or after the article title or user input contact information, the direct output may seem unprofessional.|trim, it can make these extra spaces disappear instantly, making the content look cleaner. For example, when your variable{{ article.Title }}'s actual value is" 这是文章标题 "using{{ article.Title | trim }}Then we can get."这是文章标题"Greatly improves the visual effects of the page.
In addition to deleting spaces,trimThe filter also supports removing specified characters from both ends of a string. If the format of your data always includes a specific symbol at the beginning and end of a string,###文章标题###And you only want to display the 'article title' in the middle,trimThe filter applies as well. You just need to pass the characters you want to delete as parameters.trimfor example,{{ article.Title | trim : "#" }}to###文章标题###becomes文章标题This feature is particularly convenient when handling some data imported from the outside with fixed tags.
Of course, sometimes we may only need to handle one side of a string. If we just want to remove spaces or specific characters from the beginning (left side) of a string, thentrimLeftThe filter is your ideal choice. Its usage istrimsimilar, the difference is that it only applies to the beginning of the string. For example,{{ " 你好世界" | trimLeft }}It will output"你好世界"while{{ "###重要通知" | trimLeft : "#" }}Then you will get"重要通知"Similarly, when you want to remove only the spaces or specific characters at the end of a string,trimRightthe filter will provide the same convenience. For example,{{ "你好世界 " | trimRight }}It will output"你好世界"while{{ "文件下载.zip" | trimRight : ".zip" }}Then we can get."文件下载"This is very useful for unifying the display of filenames or removing unnecessary file extensions.
These three filters make it extremely flexible and efficient to handle string leading and trailing characters in the Anqi CMS template.Through the combination of their use, you can easily clean and format your content according to your actual needs, ensuring that the display of website data always remains in **status**.
Common Questions (FAQ)
Q: These
trimDoes the filter remove spaces or specific characters from the middle of a string?A: No.trim/trimLeftandtrimRightFilters are all focused on processing strings onlyfrom the beginningand/orend. If you need to remove specific characters from a stringfrom any positionyou can use a filter, or a more flexible one usingcutfilters,replaceThe filter to replace a word or character in a string.Q: Will using these filters change the original data stored in the database?A: English. All filter operations in the Anqi CMS template only act on datadisplayEnglishThey will be processed when data is transferred from the backend to the front-end template for rendering, but will not modify the original data you enter in the backend management interface or the field values stored in the database.Your original data remains unchanged.
Q: If the specific characters to be deleted are multiple, for example, to delete simultaneously
*and#What should I do?A:trim/trimLeftandtrimRightThe character parameter of the filter accepts a string, each character of which is considered a "specific character" and will be attempted to be removed. For example, if you want to remove the characters at both ends of the string,*and#,"{{ 变量 | trim : "*#" }}The template engine checks if the string starts and ends with*or#any of them, and repeatedly removes them until there are no matches.