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POfields_for for has_many through relationship rails 3
 

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    <p>I have problem in getting below code to work.</p> <pre><code> class Page &lt; ActiveRecord::Base has_many :page_parts, :through =&gt; :page_parts_pages has_many :page_parts_pages accepts_nested_attributes_for :page_parts, :allow_destroy =&gt; true accepts_nested_attributes_for :page_parts_pages, :allow_destroy =&gt; true end class PagePart &lt; ActiveRecord::Base has_many :page_parts_pages has_many :pages, :through =&gt; :page_parts_pages end class PagePartsPage &lt; ActiveRecord::Base belongs_to :page belongs_to :page_part end </code></pre> <p>Table Structure:-</p> <pre><code> pages id, title pages_parts id, title page_parts_pages id, page_id, page_part_id </code></pre> <p>View code</p> <pre><code> &lt;% page_fragment.each do |k,v| %&gt; &lt;% if v.nil? or v.blank? or v.empty? %&gt; &lt;% parts = f.object.page_parts.build if f.object.page_parts.blank? %&gt; &lt;%= f.fields_for :page_parts, parts do |p| %&gt; &lt;%= render 'page_part_form_field', :f =&gt; p %&gt; &lt;% end %&gt; &lt;% else %&gt; &lt;% parts_page = f.object.page_parts_pages.build if f.object.page_parts_pages.blank? %&gt; &lt;%= f.fields_for :page_parts_pages, parts_page do |p| %&gt; &lt;%= render 'page_part_page_form_field', :f =&gt; p %&gt; &lt;% end %&gt; &lt;% end %&gt; &lt;% end %&gt; </code></pre> <p>Actually the scenario is, I have to display the fields for page_parts and page_parts_pages on condition basis. If condition is satisfied, display fields for page_parts else display fields for page_parts_pages. </p> <p>It's working perfectly fine for new action but for edit action it is not displaying correctly. </p> <p>Any help is highly appreciated.</p> <p>Thanks in advance </p>
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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