dede lastpost如何调用最新文章？

Of course! "Dede lastpost" is a very common term among users of the DedeCMS (also known as Dedecms) content management system. It refers to a specific PHP tag used to display a list of the latest articles or posts on a website.

Let's break it down in detail.

What is "Dede Lastpost"?

In simple terms, "Dede Lastpost" is a DedeCMS template tag ({dede:arclist}) configured to show the most recently published articles. It's not a separate function but rather a specific use of the powerful arclist (article list) tag.

You will use this tag in your DedeCMS template files (.htm) to create sections like:

• "Latest News"
• "Recent Articles"
• "Newly Published"
• "Recently Updated"

The Core Tag: {dede:arclist}

The tag responsible for displaying lists of articles is {dede:arclist}. To make it show the "last posts," you use specific attributes to control its behavior.

Basic Syntax:

{dede:arclist 
    typeid='0' len='30' 
    row='10' 
    orderby='pubdate' 
    orderway='desc'
}
    <a href='[field:arcurl/]'>[field:title/]</a>
    <span>[field:pubdate function="MyDate('Y-m-d',@me)"/]</span>
{/dede:arclist}

Key Attributes for "Lastpost"

Here are the most important attributes you'll use to configure your "lastpost" list:

Practical Examples

Here are some common examples of how you would use the "Dede Lastpost" tag.

Example 1: Simple Latest Posts List

This code displays the 10 most recent articles from all categories, with a 30-character limit on the title.

<h3>Latest Articles</h3>
<ul>
    {dede:arclist row='10' titlelen='30' orderby='pubdate' orderway='desc'}
        <li>
            <a href="[field:arcurl/]" title="[field:title/]">[field:title/]</a>
            <span class="date">([field:pubdate function="MyDate('m-d',@me)"/])</span>
        </li>
    {/dede:arclist}
</ul>

Example 2: Latest Posts from a Specific Category

To show only the latest posts from a specific category (e.g., Category ID = 3), use the typeid attribute.

<h3>Latest News</h3>
<ul>
    {dede:arclist typeid='3' row='5' titlelen='40' orderby='pubdate' orderway='desc'}
        <li>
            <a href="[field:arcurl/]">[field:title/]</a>
        </li>
    {/dede:arclist}
</ul>

Example 3: Latest Posts with Thumbnail (Litpic)

This is a very popular use case, showing the latest posts along with their featured images.

<div class="latest-posts">
    {dede:arclist row='4' titlelen='28' orderby='pubdate' orderway='desc'}
        <div class="post-item">
            <a href="[field:arcurl/]">
                <img src="[field:litpic/]" alt="[field:title/]" />
            </a>
            <h4><a href="[field:arcurl/]">[field:title/]</a></h4>
            <p class="date">[field:pubdate function="MyDate('Y-m-d',@me)"/]</p>
        </div>
    {/dede:arclist}
</div>

Common Field Variables (Placeholders)

Inside the {dede:arclist} tag, you use placeholders to display specific information about each article.

Formatting the Date

The pubdate field returns a timestamp (e.g., 1712345678). To display it in a human-readable format, you use the function parameter.

<!-- Display date as YYYY-MM-DD -->
[field:pubdate function="MyDate('Y-m-d',@me)"/]
<!-- Display date as Month Day, Year -->
[field:pubdate function="MyDate('F j, Y',@me)"/]
<!-- Display a relative time (e.g., "2 days ago") - requires custom JS -->
[field:pubdate function="GetTime(@me)"/]

Troubleshooting Common Issues

• "No articles are showing!"

  • Cause 1: The typeid might be pointing to an empty category or a category that doesn't exist.
  • Cause 2: The row value might be 0.
  • Solution: Set typeid='0' to pull from all categories and make sure row is a positive number.

• The list is showing old articles, not the latest.

  • Cause: The orderby or orderway attributes are incorrect.
  • Solution: Ensure you have orderby='pubdate' and orderway='desc'.

• The titles are too long and break the layout.

  • Cause: The titlelen value is too large.
  • Solution: Decrease the titlelen value (e.g., from 50 to 30).

Summary

To create a "Dede Lastpost" section, you need to:

1. Use the {dede:arclist} tag in your template file (e.g., index.htm).
2. Set the key attributes:
   • row: How many posts to show.
   • orderby='pubdate': Sort by publication date.
   • orderway='desc': Newest posts first.
   • typeid: (Optional) Limit to a specific category.
3. Use field variables like [field:title/] and [field:arcurl/] to display the article information.
4. Format the date using function="MyDate('format',@me)".