420 lines
15 KiB
HTML
420 lines
15 KiB
HTML
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<meta charset="utf-8">
|
|
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
|
<meta http-equiv="X-UA-Compatible" content="ie=edge">
|
|
<link rel="stylesheet" href="../../../../static/styles.css?h=dff0aaad">
|
|
<link rel="stylesheet" href="../../../../static/pygments.css">
|
|
<link rel="shortcut icon" href="../../../../static/favicon.png?h=fa09bedd">
|
|
<title>Pad | Documentation | Lektor Static Content Management System</title>
|
|
</head>
|
|
<body class="default">
|
|
<nav class="navbar navbar-inverse navbar-static-top">
|
|
<div class="container">
|
|
<div class="navbar-header">
|
|
<button type="button" class="navbar-toggle collapsed"
|
|
data-toggle="collapse" data-target="#navbar"
|
|
aria-expanded="false" aria-controls="navbar">
|
|
<span class="sr-only">Toggle navigation</span>
|
|
<span class="icon-bar"></span>
|
|
<span class="icon-bar"></span>
|
|
<span class="icon-bar"></span>
|
|
</button>
|
|
<a class="navbar-brand" href="../../../../">Lektor</a>
|
|
</div>
|
|
<div id="navbar" class="collapse navbar-collapse">
|
|
<ul class="nav navbar-nav">
|
|
|
|
<li><a href="../../../../downloads/">Download</a></li>
|
|
|
|
<li class="active"><a href="../../../">Documentation</a></li>
|
|
|
|
<li><a href="../../../../showcase/">Showcase</a></li>
|
|
|
|
<li><a href="../../../../plugins/">Plugins</a></li>
|
|
|
|
<li><a href="../../../../community/">Community</a></li>
|
|
|
|
<li><a href="../../../../blog/">Blog</a></li>
|
|
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
</nav>
|
|
|
|
<div class="body-wrapper">
|
|
|
|
<div class="container">
|
|
|
|
<div class="row">
|
|
<div class="col-sm-3">
|
|
<ul class="tree-nav nocontent">
|
|
<li><a href="../../../">Welcome</a></li>
|
|
|
|
|
|
<li><a href="../../../what/">What is Lektor</a>
|
|
|
|
|
|
<li><a href="../../../installation/">Installation</a>
|
|
|
|
|
|
<li><a href="../../../quickstart/">Quickstart</a>
|
|
|
|
|
|
<li><a href="../../../project/">Project</a>
|
|
|
|
|
|
<li><a href="../../../content/">Content</a>
|
|
|
|
|
|
<li><a href="../../../templates/">Templates</a>
|
|
|
|
|
|
<li><a href="../../../themes/">Themes</a>
|
|
|
|
|
|
<li><a href="../../../guides/">Guides</a>
|
|
|
|
|
|
<li><a href="../../../deployment/">Deployment</a>
|
|
|
|
|
|
<li><a href="../../../plugins/">Plugins</a>
|
|
|
|
|
|
<li><a href="../../../models/">Data Modelling</a>
|
|
|
|
|
|
<li><a href="../../../cli/">Command Line</a>
|
|
|
|
|
|
<li><a href="../../">API</a>
|
|
|
|
<ul>
|
|
<li><a href="../../build/">Build System</a>
|
|
|
|
|
|
<li><a href="../../databags/">Databags</a>
|
|
|
|
|
|
<li><a href="../">Database</a>
|
|
|
|
<ul>
|
|
<li><a href="../asset/">Asset</a>
|
|
|
|
|
|
<li><a href="../types/">Builtin Field Types</a>
|
|
|
|
|
|
<li><a href="../expression/">Expression</a>
|
|
|
|
|
|
<li><a href="../f/">F</a>
|
|
|
|
|
|
<li><a href="../get-alts/">get_alts()</a>
|
|
|
|
|
|
<li class="active"><a href="./">Pad</a>
|
|
|
|
<ul>
|
|
<li><a href="databags/">databags</a>
|
|
|
|
|
|
<li><a href="get/">get()</a>
|
|
|
|
|
|
<li><a href="get-root/">get_root()</a>
|
|
|
|
|
|
<li><a href="query/">query()</a>
|
|
|
|
|
|
<li><a href="resolve-url-path/">resolve_url_path()</a>
|
|
|
|
|
|
<li><a href="root/">root</a>
|
|
|
|
</ul>
|
|
|
|
|
|
<li><a href="../query/">Query</a>
|
|
|
|
|
|
<li><a href="../record/">Record</a>
|
|
|
|
|
|
<li><a href="../obj/">SourceObject</a>
|
|
|
|
|
|
<li><a href="../system-fields/">System Fields</a>
|
|
|
|
|
|
<li><a href="../type/">Type</a>
|
|
|
|
</ul>
|
|
|
|
|
|
<li><a href="../../environment/">Environment</a>
|
|
|
|
|
|
<li><a href="../../plugins/">Plugins</a>
|
|
|
|
|
|
<li><a href="../../project/">Project</a>
|
|
|
|
|
|
<li><a href="../../publisher/">Publisher</a>
|
|
|
|
|
|
<li><a href="../../templates/">Template API</a>
|
|
|
|
|
|
<li><a href="../../utils/">Utilities</a>
|
|
|
|
</ul>
|
|
|
|
|
|
<li><a href="../../../search/">Search</a>
|
|
|
|
|
|
</ul>
|
|
|
|
|
|
<div class="visible-md-block visible-lg-block">
|
|
<h4>This Page</h4>
|
|
<ul class="toc">
|
|
|
|
<li><a href="#template-usage">Template Usage</a></li>
|
|
|
|
<li><a href="#plugin-usage">Plugin Usage</a></li>
|
|
|
|
<li><a href="#manual-pad-creation">Manual Pad Creation</a></li>
|
|
|
|
</ul>
|
|
</div>
|
|
|
|
</div>
|
|
|
|
<div class="col-sm-9 doc-styling">
|
|
|
|
|
|
<h1><i class="glyphicon glyphicon-leaf"></i> <code class="mod">lektor.db.</code><code class="obj">Pad</code></h1>
|
|
|
|
|
|
|
|
<ul class=page-meta>
|
|
|
|
|
|
<li>Template variable: <a href="../../templates/globals/site/"><code>site</code></a></li>
|
|
|
|
|
|
</ul>
|
|
|
|
<p>The <code>Pad</code> is a helper class that provides basic access to querying the
|
|
database. Inside templates an instance of it is available under the
|
|
<code>site</code> variable automatically.</p>
|
|
<p>To understand what the pad does you need to consider what it is. The
|
|
pad is similar to a <code>connection</code> in a regular database. Whenever you
|
|
load a record it's temporarily cached on the pad. So unless you overflow
|
|
the cache, loading the object a second time will most likely return an
|
|
already loaded instance from the pad. This also means that the pad
|
|
is not threadsafe. So if you want (for whatever reason) use multiple
|
|
threads you have to create a separate pad for each thread.</p>
|
|
<p>This typically only comes up in the context of plugins or more complex
|
|
command line scripts.</p>
|
|
<h2 id="template-usage">Template Usage</h2><p>A ready-configured pad is always available under the <code>site</code> name which
|
|
allows you to easily discover other pages. Here is a basic example of
|
|
how to do this through the <a href="get/" class="ref">get</a> method:</p>
|
|
<div class="hll"><pre><span></span><span class="cp">{%</span> <span class="k">set</span> <span class="nv">root</span> <span class="o">=</span> <span class="nv">site.get</span><span class="o">(</span><span class="s1">'/'</span><span class="o">)</span> <span class="cp">%}</span>
|
|
<span class="p"><</span><span class="nt">title</span><span class="p">></span><span class="cp">{{</span> <span class="nv">this.title</span> <span class="cp">}}</span> | <span class="cp">{{</span> <span class="nv">root.title</span> <span class="cp">}}</span><span class="p"></</span><span class="nt">title</span><span class="p">></span>
|
|
</pre></div>
|
|
<h2 id="plugin-usage">Plugin Usage</h2><p>Within plugins it's typically not a good idea to construct a new Pad.
|
|
Instead you can get access to the current pad from the active context:</p>
|
|
<div class="hll"><pre><span></span><span class="kn">from</span> <span class="nn">lektor.context</span> <span class="kn">import</span> <span class="n">get_ctx</span>
|
|
|
|
<span class="n">ctx</span> <span class="o">=</span> <span class="n">get_ctx</span><span class="p">()</span>
|
|
<span class="k">if</span> <span class="n">ctx</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
|
|
<span class="n">pad</span> <span class="o">=</span> <span class="n">get_ctx</span><span class="p">()</span><span class="o">.</span><span class="n">pad</span>
|
|
</pre></div>
|
|
<p>Note that you can only get access to a pad if a context is available. This
|
|
will not be the case when the plugin is currently being initialized for
|
|
instance.</p>
|
|
<h2 id="manual-pad-creation">Manual Pad Creation</h2><p>If you want to work with the database from a script, you can create a
|
|
pad from the <a href="../../environment/" class="ref">Environment</a> with the help of
|
|
the <a href="../../environment/new-pad/" class="ref">new_pad</a> method:</p>
|
|
<div class="hll"><pre><span></span><span class="kn">from</span> <span class="nn">lektor.project</span> <span class="kn">import</span> <span class="n">Project</span>
|
|
|
|
<span class="n">project</span> <span class="o">=</span> <span class="n">Project</span><span class="o">.</span><span class="n">discover</span><span class="p">()</span>
|
|
<span class="n">env</span> <span class="o">=</span> <span class="n">project</span><span class="o">.</span><span class="n">make_env</span><span class="p">()</span>
|
|
<span class="n">pad</span> <span class="o">=</span> <span class="n">env</span><span class="o">.</span><span class="n">new_pad</span><span class="p">()</span>
|
|
<span class="n">root_record</span> <span class="o">=</span> <span class="n">pad</span><span class="o">.</span><span class="n">root</span>
|
|
</pre></div>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<div class="child-pages nocontent">
|
|
|
|
<div class="row">
|
|
|
|
<div class="col-md-6 child">
|
|
<h4>
|
|
<i class="glyphicon glyphicon-info-sign"></i>
|
|
<a href="databags/">databags</a>
|
|
</h4>
|
|
|
|
<p class="summary">Provides access to the databags system.</p>
|
|
|
|
</div>
|
|
|
|
<div class="col-md-6 child">
|
|
<h4>
|
|
<i class="glyphicon glyphicon-cog"></i>
|
|
<a href="get/">get()</a>
|
|
</h4>
|
|
|
|
<p class="summary">Loads a single record.</p>
|
|
|
|
</div>
|
|
|
|
</div>
|
|
|
|
<div class="row">
|
|
|
|
<div class="col-md-6 child">
|
|
<h4>
|
|
<i class="glyphicon glyphicon-cog"></i>
|
|
<a href="get-root/">get_root()</a>
|
|
</h4>
|
|
|
|
<p class="summary">Returns the root object of a specific alternative.</p>
|
|
|
|
</div>
|
|
|
|
<div class="col-md-6 child">
|
|
<h4>
|
|
<i class="glyphicon glyphicon-cog"></i>
|
|
<a href="query/">query()</a>
|
|
</h4>
|
|
|
|
<p class="summary">Creates a query at a specific path.</p>
|
|
|
|
</div>
|
|
|
|
</div>
|
|
|
|
<div class="row">
|
|
|
|
<div class="col-md-6 child">
|
|
<h4>
|
|
<i class="glyphicon glyphicon-cog"></i>
|
|
<a href="resolve-url-path/">resolve_url_path()</a>
|
|
</h4>
|
|
|
|
<p class="summary">Resolves a URL path to a into a source object.</p>
|
|
|
|
</div>
|
|
|
|
<div class="col-md-6 child">
|
|
<h4>
|
|
<i class="glyphicon glyphicon-info-sign"></i>
|
|
<a href="root/">root</a>
|
|
</h4>
|
|
|
|
<p class="summary">Returns the root object of the primary alternative.</p>
|
|
|
|
</div>
|
|
|
|
</div>
|
|
|
|
</div>
|
|
|
|
|
|
|
|
<div class="comment-box">
|
|
<h2>Comments</h2>
|
|
|
|
<div id="disqus_thread"></div>
|
|
<script>
|
|
var disqus_config = function() { this.page.identifier = "/docs/api/db/pad"; this.page.url = "https://www.getlektor.com/docs/api/db/pad/"; };
|
|
(function() {
|
|
var d = document, s = d.createElement('script');
|
|
s.src = '//lektordocumentation.disqus.com/embed.js';
|
|
s.setAttribute('data-timestamp', +new Date());
|
|
(d.head || d.body).appendChild(s);
|
|
})();
|
|
</script>
|
|
<noscript>
|
|
Please enable JavaScript to view the <a href="https://disqus.com/?ref_noscript"
|
|
rel="nofollow">comments powered by Disqus.</a>
|
|
</noscript>
|
|
|
|
</div>
|
|
|
|
</div>
|
|
</div>
|
|
|
|
</div>
|
|
|
|
</div>
|
|
|
|
|
|
<div class="bottomsummary">
|
|
<div class="container">
|
|
</div>
|
|
</div>
|
|
|
|
|
|
|
|
<footer>
|
|
<div class="container">
|
|
<div class="row">
|
|
<div class="col-sm-4 icon-bar">
|
|
<a href="https://github.com/lektor/lektor/" title="Lektor on GitHub"
|
|
><i class="fa fa-github"></i></a>
|
|
<a href="https://github.com/lektor/lektor/issues/" title="Report Issues for Lektor"
|
|
><i class="fa fa-bug"></i></a>
|
|
<a href="https://twitter.com/getlektor" title="Find Lektor on Twitter"
|
|
><i class="fa fa-twitter"></i></a>
|
|
<a href="https://gitter.im/lektor/lektor" title="Chat on Gitter"
|
|
><i class="fa fa-comment"></i></a>
|
|
<a href="https://github.com/lektor/lektor-website/tree/master/content/docs/api/db/pad/contents.lr" title="View source for this page"><i class="fa fa-code"></i></a>
|
|
</div>
|
|
<div class="col-sm-8">
|
|
<a href="../../../../license/">License & Copyright</a> •
|
|
<a href="../../../../contact/">Contact</a> •
|
|
Made with <i class="fa fa-fw fa-heart" title="Heart"><span hidden>Heart</span></i> in Carinthia
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</footer>
|
|
|
|
|
|
<script type=text/javascript src="../../../../static/app.js?h=250c2aed" charset="utf-8"></script>
|
|
<script>
|
|
((window.gitter = {}).chat = {}).options = {
|
|
room: 'lektor/lektor',
|
|
activationElement: null
|
|
};
|
|
document.write('<button class="js-gitter-toggle-chat-button">Toggle Chat</button>');
|
|
var dnt = navigator.doNotTrack || window.doNotTrack || navigator.msDoNotTrack;
|
|
if (dnt != "1" && dnt != "yes") {
|
|
window.ga=window.ga||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date;
|
|
ga('create', 'UA-70822533-1', 'auto');
|
|
ga('set', 'anonymizeIp', true);
|
|
ga('send', 'pageview');
|
|
} else {
|
|
console.debug("Respecting Do-Not-Track, not running analytics.");
|
|
}
|
|
</script>
|
|
<script async src='https://www.google-analytics.com/analytics.js'></script>
|
|
<script async defer id="github-bjs" src="https://buttons.github.io/buttons.js"></script>
|
|
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script>
|
|
<script src="https://sidecar.gitter.im/dist/sidecar.v1.js" async defer></script>
|
|
</body>
|
|
</html>
|