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PORails: Create method available in all views and all models
 

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    <h2>I'd like to define a method that is available in both my <strong>views</strong> and my <strong>models</strong></h2> <p>Say I have a view helper:</p> <pre><code>def foo(s) "hello #{s}" end </code></pre> <p>A view might use the helper like this:</p> <pre><code>&lt;div class="data"&gt;&lt;%= foo(@user.name) %&gt;&lt;/div&gt; </code></pre> <p>However, this <code>&lt;div&gt;</code> will be updated with a repeating ajax call. I'm using a <code>to_json</code> call in a controller returns data like so:</p> <pre><code>render :text =&gt; @item.to_json(:only =&gt; [...], :methods =&gt; [:foo]) </code></pre> <p>This means, that I have to have <code>foo</code> defined in my <code>Item</code> model as well:</p> <pre><code>class Item def foo "hello #{name}" end end </code></pre> <p>It'd be nice if I could have a <strong>DRY</strong> method that could be shared in <em>both</em> my views and my models.</p> <h2>Usage might look like this:</h2> <h3>Helper</h3> <pre><code>def say_hello(s) "hello #{s}" end </code></pre> <h3>User.rb model</h3> <pre><code>def foo say_hello(name) end </code></pre> <h3>Item.rb model</h3> <pre><code>def foo say_hello(label) end </code></pre> <h3>View</h3> <pre><code>&lt;div class="data"&gt;&lt;%= item.foo %&gt;&lt;/div&gt; </code></pre> <h3>Controller</h3> <pre><code>def observe @items = item.find(...) render :text =&gt; @items.to_json(:only=&gt;[...], :methods=&gt;[:foo]) end </code></pre> <p>I don't know the best way to handle this, but I don't want to completely go against best-practices here.</p> <p>If you can think of a better way, I'm eager to learn!</p>
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