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PODynamic Partial Based on Select Box - Rails 2.3.5
 

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  1. PODynamic Partial Based on Select Box - Rails 2.3.5
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    <p>I've edited my request to hopefully be clearer. I need to render a partial dynamically based on a previous selection box.</p> <p>REQUEST belongs to PRODUCT</p> <p>PRODUCT belongs to CATEGORY</p> <p>CATEGORY has many PRODUCTS</p> <p>PRODUCT has many REQUESTS</p> <p>User hits form: create_request.html.erb</p> <p>User selects a category, then the products select list is populated (like Railscast 88 - dynamic select boxes)</p> <p>What I now need is to render different partial forms based on which product is selected. I suck at jquery.</p> <p>create_request.html.erb:</p> <pre><code>&lt;%= javascript_include_tag "dynamic_products.js" %&gt; &lt;% form_for :request, :url =&gt; {:controller =&gt; :requests, :action =&gt; :create_request, :id =&gt; params[:id]} do |f| %&gt; &lt;label&gt;Select Category:&lt;/label&gt; &lt;%= select( "request", "category_id", Category.find( :all).collect { |c| [c.name, c.id] })%&gt;&lt;/br&gt; &lt;div id="product_field"&gt; &lt;label&gt;Select Product&lt;/label&gt; &lt;%= select( "request", "product_id", Product.find( :all).collect { |p| [p.name, p.id] })%&gt;&lt;/br&gt; &lt;/div&gt; #### and here is where I need help: #### if request.product_id = 1, render partial _form1 #### if request.product_id = 2, render partial _form2 &lt;button type="submit"&gt;Submit&lt;/button&gt; &lt;% end %&gt; </code></pre> <p>dynamic_products.js.erb:</p> <pre><code>var products = new Array(); &lt;% for product in @products -%&gt; products.push(new Array(&lt;%= product.category_id %&gt;, '&lt;%=h product.name %&gt;', &lt;%= product.id %&gt;, &lt;%= product.active %&gt;)); products.sort() &lt;% end -%&gt; function categorySelected() { category_id = $('request_category_id').getValue(); options = $('request_product_id').options; options.length = 1; products.each(function(product) { if (product[0] == category_id &amp;&amp; product[3] == 1) { options[options.length] = new Option(product[1], product[2]); } }); if (options.length == 1) { $('product_field').hide(); } else { $('product_field').show(); } } document.observe('dom:loaded', function() { categorySelected(); $('request_category_id').observe('change', categorySelected); }); </code></pre>
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    1. COYou need to use Ajax, trigger it on the event 'onChange' of the product/service select_box, pass the selected value to Ajax and then render partially the form.
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    2. COThat's exactly what I need to do. Can you help me with a skeleton method to get me started? Really appreciate it
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    3. COI need more info about the relation between Request / Category / Product (who belongs to who); and possibly how the select_box should be updated (refresh the list of products belonging to the selected category?)
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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