213 lines
		
	
	
		
			6.3 KiB
		
	
	
	
		
			Markdown
		
	
	
	
			
		
		
	
	
			213 lines
		
	
	
		
			6.3 KiB
		
	
	
	
		
			Markdown
		
	
	
	
| ---
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| layout: docs
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| title: Pagination
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| prev_section: permalinks
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| next_section: plugins
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| permalink: /docs/pagination/
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| ---
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| 
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| With many websites—especially blogs—it’s very common to break the main listing
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| of posts up into smaller lists and display them over multiple pages. Jekyll has
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| pagination built-in, so you can automatically generate the appropriate files and
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| folders you need for paginated listings.
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| 
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| <div class="note info">
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|   <h5>Pagination only works within HTML files</h5>
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|   <p>
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|     Pagination does not work with Markdown or Textile files in your Jekyll site.
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|     It will only work when used within HTML files. Since you’ll likely be using
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|     this for the list of Posts, this shouldn’t be an issue.
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|   </p>
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| </div>
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| 
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| ## Enable pagination
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| 
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| To enable pagination for your blog, add a line to the `_config.yml` file that
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| specifies how many items should be displayed per page:
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| 
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| {% highlight yaml %}
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| paginate: 5
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| {% endhighlight %}
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| 
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| The number should be the maximum number of Posts you’d like to be displayed per-
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| page in the generated site.
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| 
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| You may also specify where the destination of the pagination pages:
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| 
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| {% highlight yaml %}
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| paginate_path: "blog/page:num"
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| {% endhighlight %}
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| 
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| This will read in `blog/index.html`, send it each pagination page in Liquid as `paginator`
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| and write the output to `blog/page:num`, where `:num` is the pagination page number,
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| starting with `2`. If a site has 12 posts and specifies `paginate: 5`, Jekyll will write
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| `blog/index.html` with the first 5 posts, `blog/page2/index.html` with the next 5 posts
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| and `blog/page3/index.html` with the last 2 posts into the destination directory.
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| 
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| ## Liquid Attributes Available
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| 
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| The pagination plugin exposes the `paginator` liquid object with the following
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| attributes:
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| 
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| <div class="mobile-side-scroller">
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| <table>
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|   <thead>
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|     <tr>
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|       <th>Attribute</th>
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|       <th>Description</th>
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|     </tr>
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|   </thead>
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|   <tbody>
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|     <tr>
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|       <td><p><code>page</code></p></td>
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|       <td><p>current page number</p></td>
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|     </tr>
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|     <tr>
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|       <td><p><code>per_page</code></p></td>
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|       <td><p>number of posts per page</p></td>
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|     </tr>
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|     <tr>
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|       <td><p><code>posts</code></p></td>
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|       <td><p>a list of posts for the current page</p></td>
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|     </tr>
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|     <tr>
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|       <td><p><code>total_posts</code></p></td>
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|       <td><p>total number of posts in the site</p></td>
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|     </tr>
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|     <tr>
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|       <td><p><code>total_pages</code></p></td>
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|       <td><p>number of pagination pages</p></td>
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|     </tr>
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|     <tr>
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|       <td><p><code>previous_page</code></p></td>
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|       <td>
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|           <p>
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|               page number of the previous pagination page,
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|               or <code>nil</code> if no previous page exists
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|           </p>
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|       </td>
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|     </tr>
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|     <tr>
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|       <td><p><code>previous_page_path</code></p></td>
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|       <td>
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|           <p>
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|               path of previous pagination page,
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|               or <code>nil</code> if no previous page exists
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|           </p>
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|       </td>
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|     </tr>
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|     <tr>
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|       <td><p><code>next_page</code></p></td>
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|       <td>
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|           <p>
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|               page number of the next pagination page,
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|               or <code>nil</code> if no subsequent page exists
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|           </p>
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|       </td>
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|     </tr>
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|     <tr>
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|       <td><p><code>next_page_path</code></p></td>
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|       <td>
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|           <p>
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|               path of next pagination page,
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|               or <code>nil</code> if no subsequent page exists
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|           </p>
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|       </td>
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|     </tr>
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|   </tbody>
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| </table>
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| </div>
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| 
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| <div class="note info">
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|   <h5>Pagination does not support tags or categories</h5>
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|   <p>Pagination pages through every post in the <code>posts</code>
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|   variable regardless of variables defined in the YAML Front Matter of
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|   each. It does not currently allow paging over groups of posts linked
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|   by a common tag or category. It cannot include any collection of
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|   documents because it is restricted to posts.</p>
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| </div>
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| 
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| ## Render the paginated Posts
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| 
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| The next thing you need to do is to actually display your posts in a list using
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| the `paginator` variable that will now be available to you. You’ll probably want
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| to do this in one of the main pages of your site. Here’s one example of a simple
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| way of rendering paginated Posts in a HTML file:
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| 
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| {% highlight html %}
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| {% raw %}
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| ---
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| layout: default
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| title: My Blog
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| ---
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| 
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| <!-- This loops through the paginated posts -->
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| {% for post in paginator.posts %}
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|   <h1><a href="{{ post.url }}">{{ post.title }}</a></h1>
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|   <p class="author">
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|     <span class="date">{{ post.date }}</span>
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|   </p>
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|   <div class="content">
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|     {{ post.content }}
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|   </div>
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| {% endfor %}
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| 
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| <!-- Pagination links -->
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| <div class="pagination">
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|   {% if paginator.previous_page %}
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|     <a href="/page{{ paginator.previous_page }}" class="previous">Previous</a>
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|   {% else %}
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|     <span class="previous">Previous</span>
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|   {% endif %}
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|   <span class="page_number ">Page: {{ paginator.page }} of {{ paginator.total_pages }}</span>
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|   {% if paginator.next_page %}
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|     <a href="/page{{ paginator.next_page }}" class="next">Next</a>
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|   {% else %}
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|     <span class="next ">Next</span>
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|   {% endif %}
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| </div>
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| {% endraw %}
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| {% endhighlight %}
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| 
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| <div class="note warning">
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|   <h5>Beware the page one edge-case</h5>
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|   <p>
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|     Jekyll does not generate a ‘page1’ folder, so the above code will not work
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|     when a <code>/page1</code> link is produced. See below for a way to handle
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|     this if it’s a problem for you.
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|   </p>
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| </div>
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| 
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| The following HTML snippet should handle page one, and render a list of each
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| page with links to all but the current page.
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| 
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| {% highlight html %}
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| {% raw %}
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| {% if paginator.total_pages > 1 %}
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| <div class="pagination">
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|   {% if paginator.previous_page %}
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|     <a href="{{ paginator.previous_page_path | prepend: site.baseurl | replace: '//', '/' }}">« Prev</a>
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|   {% else %}
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|     <span>« Prev</span>
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|   {% endif %}
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| 
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|   {% for page in (1..paginator.total_pages) %}
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|     {% if page == paginator.page %}
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|       <em>{{ page }}</em>
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|     {% elsif page == 1 %}
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|       <a href="{{ '/index.html' | prepend: site.baseurl | replace: '//', '/' }}">{{ page }}</a>
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|     {% else %}
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|       <a href="{{ site.paginate_path | prepend: site.baseurl | replace: '//', '/' | replace: ':num', page }}">{{ page }}</a>
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|     {% endif %}
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|   {% endfor %}
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| 
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|   {% if paginator.next_page %}
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|     <a href="{{ paginator.next_page_path | prepend: site.baseurl | replace: '//', '/' }}">Next »</a>
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|   {% else %}
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|     <span>Next »</span>
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|   {% endif %}
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| </div>
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| {% endif %}
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| {% endraw %}
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| {% endhighlight %}
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