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POSelecting a value from the select box when options added by an ajax call
 

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    <p>I have a form to add recipes, in the same form the user can add multiple recipe ingredients. Every ingredient the user adds is done by an ajax call, this way I don't have to display a select box of ingredients. When the user user select's an ingredient the id of the selected ingredient is stored in a hidden input</p> <pre><code> &lt;%= builder.hidden_field :ingredient_id %&gt;&lt;/div&gt; </code></pre> <p>When the user selects an ingredient from the list, a trigger an ajax call to populate another select box which display's all the serving sizes based on the ingredient. This set up works perfectly when I am adding new recipes. </p> <p>I have an issue when I open an existing recipe in edit mode...</p> <p>I have the following html</p> <pre><code>&lt;%= builder.hidden_field :ingredient_id %&gt; &lt;%= builder.select(:serving_size_id, '') %&gt; </code></pre> <p>jQuery code</p> <pre><code>jQuery.fn.bindServingSizes = function(ingredientid) { var $this = $(this); $.getJSON("/serving_sizes?ingredientid=" + ingredientid, function(j) { var options = "&lt;option value=''&gt;Please select a serving size&lt;/option&gt;"; for (var i=0; i &lt; j.length; i++) options += '&lt;option value="' + j[i].serving_size.id + '"&gt;' + j[i].serving_size.name + '&lt;/option&gt;'; $this.html(options); }); }; </code></pre> <p>I have an ajax call which runs when the page loads, it reads the value in the hidden input and gets the serving sizes and adds it as options to the select box. <strong>My question</strong>: How will I select the correct option in the select box? I have the data in the column "serving_size_id", <strong>but I don't know how to get it's value so I can set the correct selected item by value.</strong></p> <p>I hope I am clear enough in my explanation.</p>
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