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PORails 3 - How do I dynamically create an html element that is associated with a param[:id]?
 

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  1. PORails 3 - How do I dynamically create an html element that is associated with a param[:id]?
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    <p>I'm attempting to implement a Rails 3 application that needs to use the html5 drawing canvas.</p> <p>So far I have a Sketch scaffold and I've modified the <strong>index</strong> and <strong>show</strong> views to be side-by-side (I typed the hidden <strong>div</strong> in there just to show that I plan to host the canvas in a div):</p> <p><img src="https://i.stack.imgur.com/D23if.png" alt="enter image description here"></p> <p>Currently in the <strong>application.js</strong> file I have a script that accesses the show action through an Ajax request and places it right next to the Sketches list. Here is the code for that:</p> <pre><code>// Show individual sketch $(function(){ var $sketch_div = $('#show_sketch_div'); // return html instead of js $('a[data-remote]').live('ajax:beforeSend', function(e, xhr, settings){ xhr.setRequestHeader('accept', '*/*;q=0.5, text/html, ' + settings.accepts.html); }); // Handle sketch name links with the data-remote attribute $('a[data-remote]').live('ajax:success', function(xhr, data, status){ $sketch_div .html(data) .show(); }); }); </code></pre> <p>Also, each of the links in the Sketches list has a class associated with it (in order to grab it with JQuery):</p> <pre><code>&lt;td&gt;&lt;%= link_to 'Show', sketch, :remote =&gt; true, :class =&gt; 'show_sketch_button' %&gt;&lt;/td&gt; </code></pre> <p>I have the Sketch controller set up to render JSON:</p> <blockquote> <p>def show @sketch = Sketch.find(params[:id])</p> <pre><code>respond_to do |format| format.html # show.html.erb format.xml { render :xml =&gt; @sketch } format.json { render :json =&gt; @sketch } end </code></pre> <p>end</p> </blockquote> <p>This part is where I'm really stuck. </p> <p>I plan on using JQuery to insert a Canvas tag whenever a Sketch's <strong>show</strong> button is clicked. However, I have no idea how to get the <strong>id</strong> paramater of the associated sketch with Javascript and then use that to generate a Canvas element that is only associated with that particular <strong>id</strong>.</p> <p>I've searched for JSON tutorials but I can't find anything that seems to address what I'm trying to do. I'm also very new to JSON - so I could just be missing it. </p> <p>Does anyone have any ideas or an example that you can point me to?</p>
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