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363 lines
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<li><a href="../../">Welcome</a></li>
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<li><a href="../../what/">What is Lektor</a>
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<ul>
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<li><a href="../alts/">Alternatives</a>
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<li><a href="../databags/">Data Bags</a>
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<li><a href="../flow/">Flow</a>
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<li class="active"><a href="./">Paths</a>
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<ul></ul>
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<li><a href="../system-fields/">System Fields</a>
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<li><a href="../urls/">URLs and Slugs</a>
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<li><a href="../../models/">Data Modelling</a>
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<div class="visible-md-block visible-lg-block">
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<h4>This Page</h4>
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<ul class="toc">
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<li><a href="#what-is-a-path">What is a Path</a></li>
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<li><a href="#virtual-paths">Virtual Paths</a></li>
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<li><a href="#relative-paths">Relative Paths</a></li>
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<li><a href="#alternatives-and-paths">Alternatives and Paths</a></li>
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</ul>
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</div>
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<div class="col-sm-9 doc-styling">
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<h1>Paths</h1>
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<ul class=page-meta>
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</ul>
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<div class="admonition admonition-info"><p>This refers mostly to Lektor 2.0. If you are using an older version of
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Lektor the virtual path feature is not implemented yet and a lot of this just
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does not apply.</p></div><p>Lektor attempts to map the paths from the content folder as closely as possible
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to the final URLs (at least in the default configuration). There are various
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ways in which this can be customized (see <a href="../urls/" class="ref">URLs and Slugs</a>) and
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there are situations in which Lektor needs to render out content that does not
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actually directly correspond to a path on the file system.</p>
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<p>Here we try to explain how the path system in Lektor works and what it means.</p>
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<h2 id="what-is-a-path">What is a Path</h2><p>A path in Lektor is a string that uniquely identifies a <a href="../../api/db/obj/" class="ref">Source Object</a>. For the most part these directly point to
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<code>content.lr</code> files or attachments therein. These paths always use forward
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slashes, no matter on which platform Lektor runs. So for instance if you
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have a file named <code>projects/my-project/contents.lr</code> then the path for this
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record will be <code>/projects/my-project</code>. Thereby it does not matter if the
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slug or final URL was changed, the path is always the same.</p>
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<p>Lektor uses paths to refer to records by default in all cases. This means that
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if you use the <a href="../../api/templates/filters/url/" class="ref">url filter</a> for instance
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it will operate on paths and not URLs!</p>
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<p>But what about sources that do not directly correspond to something on the
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file system? This is where virtual paths come in. Virtual paths are
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separated from physical paths with an at (<code>@</code>) sign. Virtual paths are always
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attached to a record and point to things that are not actually coming from the
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content folder but something else.</p>
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<p>Virtual paths are for instance used to refer to paginated pages or to some
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resources that plugins add.</p>
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<h2 id="virtual-paths">Virtual Paths</h2><p>Virtual paths are added behind physical paths and are separated by an at
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sign (<code>@</code>). The only virtual path that is supported by Lektor out of the box
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is the special numeric virtual path which can be used to refer to specific
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pages for a pagination. For instance <code>/blog@1</code> refers to the first page of
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the <code>blog</code> page, <code>/blog@2</code> to the second etc. There are however plugins that
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add virtual paths to refer to their own resources. For instance a plugin can
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register <code>/blog@feed</code> to refer to a RSS/Atom feed for the blog.</p>
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<h2 id="relative-paths">Relative Paths</h2><p>Now that we talked a bit about paths, we should probably cover how relative
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paths work. Relative paths work similar to how you expect them to work on
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most operating systems but they can operate on the virtual as well as the
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physical path. There is also some special behavior with regards to the numeric
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virtual path for pagination.</p>
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<p>For the most part <code>.</code> refers to the same page and <code>..</code> refers to the page one
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level up. If you use a path that just contains of a virtual path, then it's
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attached to the current page to replace the active virtual path.</p>
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<table>
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<thead><tr>
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<th>Current</th>
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<th>Relative</th>
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<th>Result</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><code>/blog</code></td>
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<td><code>..</code></td>
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<td><code>/</code></td>
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</tr>
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<tr>
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<td><code>/blog</code></td>
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<td><code>.</code></td>
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<td><code>/blog</code></td>
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</tr>
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<tr>
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<td><code>/blog/post</code></td>
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<td><code>..</code></td>
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<td><code>/blog</code></td>
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</tr>
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<tr>
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<td><code>/blog</code></td>
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<td><code>@2</code></td>
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<td><code>/blog@2</code></td>
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</tr>
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<tr>
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<td><code>/blog@2</code></td>
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<td><code>@1</code></td>
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<td><code>/blog@1</code></td>
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</tr>
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<tr>
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<td><code>/blog@feed</code></td>
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<td><code>recent</code></td>
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<td><code>/blog@feed/recent</code></td>
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</tr>
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<tr>
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<td><code>/blog@feed</code></td>
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<td><code>..</code></td>
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<td><code>/blog@feed</code></td>
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</tr>
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</tbody>
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</table>
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<p>However! The numeric path is special with regards because it's considered to
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belong to the current page:</p>
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<table>
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<thead><tr>
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<th>Current</th>
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<th>Relative</th>
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<th>Result</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><code>/blog@2</code></td>
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<td><code>.</code></td>
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<td><code>/blog@2</code></td>
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</tr>
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<tr>
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<td><code>/blog@2</code></td>
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<td><code>..</code></td>
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<td><code>/</code></td>
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</tr>
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</tbody>
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</table>
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<h2 id="alternatives-and-paths">Alternatives and Paths</h2><p>If you have used Lektor a bit you might be wondering how <a href="../alts/" class="ref">Alternatives</a> work with paths. The answer might be surprising but it's
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basically that they don't really work with paths. Alternatives are
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implemented on a level higher than paths. If you have a page that exists
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in both German and English alternative then they will have the same path.
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The alternative code is supplied separately.</p>
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<p>This is done so that you can later start introducing alternatives to sites
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that were never aware of them without having to go everywhere and start
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passing alternative information around. While there are indeed some places
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where you might have to perform some changes (especially if you perform
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manual queries in the templates) for the most part adding alternatives to an
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existing site later is a trivial matter.</p>
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