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    copied!<p>You have to wrapp your phone_nos into your addresses within the form, and not in the organization.</p> <p>Change this block:</p> <pre><code> &lt;div class="control-group"&gt; &lt;label class="control-label"&gt;Office Address&lt;/label&gt; &lt;div class="controls"&gt; &lt;%= f.link_to_add "&lt;i class='icon-plus'&gt;&lt;/i&gt;".html_safe, :addresses%&gt; &lt;%= f.fields_for :addresses do |task_form| %&gt; &lt;div class="input-prepend"&gt; &lt;%= task_form.text_field :offc_addr, :label =&gt; false, :placeholder =&gt; 'Office Address'%&gt; &lt;div class="control-group"&gt; &lt;label class="control-label"&gt;Telephone&lt;/label&gt; &lt;div class="controls"&gt; &lt;%= f.link_to_add "&lt;i class='icon-plus'&gt;&lt;/i&gt;".html_safe, :phone_nos%&gt; &lt;%= f.fields_for :phone_nos do |task_form| %&gt; &lt;div class="input-prepend"&gt; &lt;%= task_form.text_field :offc_ph, :label =&gt; false, :placeholder =&gt; 'Office Address'%&gt; &lt;/div&gt; &lt;div class="input-prepend"&gt; &lt;%= task_form.text_field :offc_ext, :label =&gt; false, :placeholder =&gt; 'Office Extension'%&gt; &lt;/div&gt; &lt;div class="input-prepend"&gt; &amp;nbsp;&amp;nbsp; &lt;%= task_form.link_to_remove "&lt;i class='icon-remove'&gt;&lt;/i&gt;".html_safe%&gt; &lt;% end %&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class="input-prepend"&gt; &amp;nbsp;&amp;nbsp; &lt;%= task_form.link_to_remove "&lt;i class='icon-remove'&gt;&lt;/i&gt;".html_safe%&gt; &lt;% end %&gt; &lt;/div&gt; &lt;/div&gt; </code></pre> <p>to this one:</p> <pre><code> &lt;div class="control-group"&gt; &lt;label class="control-label"&gt;Office Address&lt;/label&gt; &lt;div class="controls"&gt; &lt;%= f.link_to_add "&lt;i class='icon-plus'&gt;&lt;/i&gt;".html_safe, :addresses%&gt; &lt;%= f.fields_for :addresses do |task_form| %&gt; &lt;div class="input-prepend"&gt; &lt;%= task_form.text_field :offc_addr, :label =&gt; false, :placeholder =&gt; 'Office Address'%&gt; &lt;div class="control-group"&gt; &lt;label class="control-label"&gt;Telephone&lt;/label&gt; &lt;div class="controls"&gt; &lt;%= task_form.link_to_add "&lt;i class='icon-plus'&gt;&lt;/i&gt;".html_safe, :phone_nos%&gt; &lt;%= task_form.fields_for :phone_nos do |phone_no| %&gt; &lt;div class="input-prepend"&gt; &lt;%= phone_no.text_field :offc_ph, :label =&gt; false, :placeholder =&gt; 'Office Address'%&gt; &lt;/div&gt; &lt;div class="input-prepend"&gt; &lt;%= phone_no.text_field :offc_ext, :label =&gt; false, :placeholder =&gt; 'Office Extension'%&gt; &lt;/div&gt; &lt;div class="input-prepend"&gt; &amp;nbsp;&amp;nbsp; &lt;%= phone_no.link_to_remove "&lt;i class='icon-remove'&gt;&lt;/i&gt;".html_safe%&gt; &lt;% end %&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class="input-prepend"&gt; &amp;nbsp;&amp;nbsp; &lt;%= task_form.link_to_remove "&lt;i class='icon-remove'&gt;&lt;/i&gt;".html_safe%&gt; &lt;% end %&gt; &lt;/div&gt; &lt;/div&gt; </code></pre> <p>For more information about accepts_nested_attributes_for check out the railscasts from ryan bates. <a href="http://railscasts.com/episodes?utf8=%E2%9C%93&amp;search=nested+model+form" rel="nofollow">http://railscasts.com/episodes?utf8=%E2%9C%93&amp;search=nested+model+form</a></p> <p>To check out the API docs: <a href="http://api.rubyonrails.org/classes/ActiveRecord/NestedAttributes/ClassMethods.html" rel="nofollow">http://api.rubyonrails.org/classes/ActiveRecord/NestedAttributes/ClassMethods.html</a></p> <p>Btw for such basic questions, railscasts.com was always a good point to start for me.</p> <p><strong>UPDATE: To show all phone_nos within the addresses:</strong></p> <p>Simple loop also through the adresses phone_nos</p> <pre><code>&lt;tr&gt; &lt;th col span="1" style="width: 200px"&gt;Office Address: &lt;/th&gt; &lt;td&gt; &lt;% if @um_org_datum.addresses %&gt; &lt;% @um_org_datum.addresses.each do |i| %&gt; &lt;%= i.offc_addr %&gt;&lt;br/&gt; &lt;% i.phone_nos.each do |phone_no| %&gt; &lt;%= phone_no.offc_ph %&gt;&lt;br/&gt; &lt;%= phone_no.offc_ext %&gt; &lt;% end %&gt; &lt;% end %&gt; &lt;% end %&gt; &lt;/td&gt; &lt;/tr&gt; </code></pre>
 

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