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POparams.require().permit does not work as expected
 

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  1. POparams.require().permit does not work as expected
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    <p>I have this controller</p> <pre><code>class PeopleController &lt; ApplicationController def new @person = Person.new @person.phones.new end # this is the action that gets called by the form def create render text: person_params.inspect # @person = Person.new(person_params) # @person.save # redirect_to people_path end def index @person = Person.all end private def person_params params.require(:person).permit(:name, phones_attributes: [ :id, :phone_number ]) end end </code></pre> <p>and this view</p> <pre><code>&lt;%= form_for :person, url: people_path do |f| %&gt; &lt;p&gt; &lt;%= f.label :name %&gt;&lt;br /&gt; &lt;%= f.text_field :name %&gt; &lt;/p&gt; &lt;%= f.fields_for :phones do |f_phone| %&gt; &lt;div class="field"&gt; &lt;p&gt; &lt;%= f_phone.label :phone_number %&gt;&lt;br /&gt; &lt;%= f_phone.text_field :phone_number %&gt; &lt;/p&gt; &lt;/div&gt; &lt;% end %&gt; &lt;p&gt; &lt;%= f.submit %&gt; &lt;/p&gt; &lt;% end %&gt; </code></pre> <p>When I fill out both form fields and hit "Save Person" I only get <code>{"name"=&gt;"foo"}</code> - the phone number seems to vanish.</p> <p>However, when I change <code>phones_attributes</code> to <code>phones</code> I get <code>{"name"=&gt;"foo", "phones"=&gt;{"phone_number"=&gt;"123"}}</code> (this would however cause problems with the create function.</p> <p>What's wrong here?</p> <p>Please note that this question is strongly related to that one: <a href="https://stackoverflow.com/questions/17558309/accepts-nested-attributes-for-what-am-i-doing-wrong">accepts_nested_attributes_for: What am I doing wrong</a> as well as to this posting: <a href="https://groups.google.com/forum/#!topic/rubyonrails-talk/4RF_CFChua0" rel="nofollow noreferrer">https://groups.google.com/forum/#!topic/rubyonrails-talk/4RF_CFChua0</a></p>
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