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POruby on rails params is nil
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  1. POruby on rails params is nil
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    copied!<p>I'm having the following code in my view:</p> <pre><code>&lt;%= form_for :command_selected, :method =&gt; "get", :url =&gt; {:action =&gt; "command_domain_selected"} do |f| %&gt; &lt;%= f.submit "Make Deployment" %&gt; &lt;%= f.radio_button :domain, '1dev-den' %&gt; &lt;%= label :domain, '1dev-den'%&gt;&lt;br /&gt; &lt;%= f.radio_button :domain, '2dev-den' %&gt; &lt;%= label :domain, '2dev-den'%&gt;&lt;br /&gt; </code></pre> <p>When i click on the <code>submit (make deployment)</code> button, <code>parameters</code> from <code>submit button</code> and <code>radio button</code> are passed on to the action mentiond in the <code>form_for</code> above. But if i do not select any radio button and cilck on submit, it throws the (nil object returned you might be expecting an instance of array) error. However, i want to test if the parameter is nil in my action and redirect to some other view. Below is my code for the action</p> <pre><code>def command_domain_selected if(params[:command_selected][:domain].nil?) respond_to do |format| format.html{redirect_to wrong_selection_path} end else @command_selected = params[:commit] @domain_selected = params[:command_selected][:domain] end end </code></pre> <p>Why is it throwing the nil object error even when im checking it before hand? Please help</p> <pre><code>Update: Below is the error i'm getting NoMethodError in AuthorizationController#command_domain_selected You have a nil object when you didn't expect it! You might have expected an instance of Array. The error occurred while evaluating nil.[]Rails.root: c:/Final/authorize Parameters: {"utf8"=&gt;"✓", "commit"=&gt;"Make Deployment"} </code></pre>
 

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