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    <p>Normally, you will probably use the <code>select</code> helper.</p> <p>Reference: <a href="http://api.rubyonrails.org/classes/ActionView/Helpers/FormOptionsHelper.html#method-i-select" rel="nofollow">api.rubyonrails.org</a></p> <p>In this case, this:</p> <pre class="lang-ruby prettyprint-override"><code>select("post", "category", Post::CATEGORIES, {:disabled =&gt; 'restricted'}) </code></pre> <p>could become:</p> <pre class="lang-html prettyprint-override"><code>&lt;select name="post[category]"&gt; &lt;option&gt;&lt;/option&gt; &lt;option&gt;joke&lt;/option&gt; &lt;option&gt;poem&lt;/option&gt; &lt;option disabled="disabled"&gt;restricted&lt;/option&gt; &lt;/select&gt; </code></pre> <p>Instead of supplying an array of disabled options, using the <code>collection_select</code> method, you can also supply a Proc:</p> <pre class="lang-ruby prettyprint-override"><code>collection_select(:post, :category_id, Category.all, :id, :name, \ {:disabled =&gt; lambda{|category| category.archived? }}) </code></pre> <p>If the categories “2008 stuff” and “Christmas” return true when the method archived? is called, this would return:</p> <pre class="lang-html prettyprint-override"><code>&lt;select name="post[category_id]"&gt; &lt;option value="1" disabled="disabled"&gt;2008 stuff&lt;/option&gt; &lt;option value="2" disabled="disabled"&gt;Christmas&lt;/option&gt; &lt;option value="3"&gt;Jokes&lt;/option&gt; &lt;option value="4"&gt;Poems&lt;/option&gt; &lt;/select&gt; </code></pre> <hr> <p>You can also supply an array of disabled options in the options hash to the <code>options_for_select</code> method. Reference: <a href="http://apidock.com/rails/ActionView/Helpers/FormOptionsHelper/options_for_select" rel="nofollow">apidock.com</a></p> <p><strong>Example with an array of disabled options</strong></p> <pre class="lang-ruby prettyprint-override"><code>options_for_select(["Free", "Basic", "Advanced", "Super Platinum"], \ :disabled =&gt; ["Advanced", "Super Platinum"]) </code></pre> <p>Gives:</p> <pre class="lang-html prettyprint-override"><code>&lt;option value="Free"&gt;Free&lt;/option&gt; &lt;option value="Basic"&gt;Basic&lt;/option&gt; &lt;option value="Advanced" disabled="disabled"&gt;Advanced&lt;/option&gt; &lt;option value="Super Platinum" disabled="disabled"&gt;Super Platinum&lt;/option&gt; </code></pre>
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    1. POHow to disable some of the options in a select?
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    1. COThanks it worked for me
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      1. USRanjeet Lal Bahadur Maurya
 

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