chancery: Update site.
| author |
Steve Losh <steve@stevelosh.com> |
| date |
Mon, 18 Dec 2017 17:45:45 -0500 |
| parents |
388fd65c29fc |
| children |
(none) |
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Garter ยป
Urls
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urls
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<h1><a href="">URL Convenience Functions</a></h1>
<p>URLs are a pain. Garter tries to help by providing some useful functions to
make working with URLs easier.</p>
<div class="toc">
<ul>
<li><a href="#permalink">permalink</a></li>
</ul>
</div>
<h2 id="permalink">permalink</h2>
<p>The <code>permalink</code> decorator was taken from <a href="http://flask.pocoo.org/snippets/6/">this snippet</a> on the
Flask site. It's used to wrap functions so they only need to return the
arguments to Flask's <code>url_for</code> function, instead of calling the function
themselves.</p>
<p>For example, say you have several classes that represents items on your site:</p>
<div class="codehilite"><pre><span class="kn">from</span> <span class="nn">flask</span> <span class="kn">import</span> <span class="n">url_for</span>
<span class="k">class</span> <span class="nc">Event</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">event_id</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">event_id</span> <span class="o">=</span> <span class="n">event_id</span>
<span class="k">def</span> <span class="nf">link</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="n">url_for</span><span class="p">(</span><span class="s">'event'</span><span class="p">,</span> <span class="n">event_id</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">event_id</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">User</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">username</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">username</span> <span class="o">=</span> <span class="n">username</span>
<span class="k">def</span> <span class="nf">link</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="n">url_for</span><span class="p">(</span><span class="s">'profile'</span><span class="p">,</span> <span class="n">username</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">username</span><span class="p">)</span>
</pre></div>
<p>Using the permalink decorator can make the <code>link</code> functions a bit cleaner:</p>
<div class="codehilite"><pre><span class="kn">from</span> <span class="nn">garter.urls</span> <span class="kn">import</span> <span class="n">permalink</span>
<span class="k">class</span> <span class="nc">Event</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">event_id</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">event_id</span> <span class="o">=</span> <span class="n">event_id</span>
<span class="nd">@permalink</span>
<span class="k">def</span> <span class="nf">link</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="s">'event'</span><span class="p">,</span> <span class="p">{</span> <span class="s">'event_id'</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">event_id</span> <span class="p">}</span>
<span class="k">class</span> <span class="nc">User</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">username</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">username</span> <span class="o">=</span> <span class="n">username</span>
<span class="nd">@permalink</span>
<span class="k">def</span> <span class="nf">link</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="s">'profile'</span><span class="p">,</span> <span class="p">{</span> <span class="s">'username'</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">username</span> <span class="p">}</span>
</pre></div>
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<a href="http://sjl.bitbucket.org/garter/">Garter</a>
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<a href="http://stevelosh.com/">Steve Losh</a>.
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