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POpartial form for nested models in rails 3
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  1. POpartial form for nested models in rails 3
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    copied!<p>I have two models pages and author, here is the code of model pages:</p> <h1>edit -1</h1> <p>now my models are as follows:</p> <pre><code>class Page &lt; ActiveRecord::Base validates :title, :presence =&gt; true belongs_to :author end </code></pre> <p>author model:</p> <pre><code>class Author &lt; ActiveRecord::Base has_many :pages end </code></pre> <p>and my form is as follows:</p> <pre><code> &lt;%= form_for(@page) do |f| %&gt; &lt;% if @page.errors.any? %&gt; &lt;div id="error_explanation"&gt; &lt;h2&gt;&lt;%= pluralize(@page.errors.count, "error") %&gt; prohibited this post from being saved:&lt;/h2&gt; &lt;ul&gt; &lt;% @page.errors.full_messages.each do |msg| %&gt; &lt;li&gt;&lt;%= msg %&gt;&lt;/li&gt; &lt;% end %&gt; &lt;/ul&gt; &lt;/div&gt; &lt;% end %&gt; &lt;p&gt; &lt;%= f.label :title %&gt;&lt;br /&gt; &lt;%= f.text_field :title %&gt; &lt;/p&gt; &lt;p&gt; &lt;%= f.label :body %&gt;&lt;br /&gt; &lt;%= f.text_area :body %&gt; &lt;/p&gt; &lt;p&gt; &lt;%= f.fields_for :author do |fields| %&gt; &lt;%= f.label :author %&gt;&lt;br /&gt; &lt;%= fields.text_field :author %&gt; &lt;% end %&gt; &lt;/p&gt; &lt;p&gt; &lt;%= f.label :email %&gt;&lt;br /&gt; &lt;%= f.text_field :email %&gt; &lt;/p&gt; &lt;p&gt; &lt;%= f.label :reference %&gt;&lt;br /&gt; &lt;%= f.select(:reference,[['google',1],['yahoo',2],['MSN',3],['Ask',4]]) %&gt; &lt;/p&gt; &lt;%= f.submit "Submit" %&gt; &lt;% end %&gt; </code></pre> <p>and controller :</p> <pre><code>class PagesController &lt; ApplicationController def index @total = Page.count @pages = Page.find(:all) end def show @page = Page.find(params[:id]) end def new @page = Page.new end def create @page = Page.new(params[:page]) if @page.save redirect_to pages_path, :notice =&gt; "The data has been saved!" else render "new" end end def edit @page = Page.find(params[:id]) end def update @page = Page.find(params[:id]) if @page.update_attributes(params[:page]) redirect_to pages_path, :notice =&gt; "Your post has been updated!" else render "edit" end end def destroy @page = Page.find(params[:id]) @page.destroy redirect_to pages_path, :notice =&gt; "Your page has been deleted!" end end </code></pre> <p>Now when i am submitting the form it is giving me this error:</p> <pre><code>ActiveRecord::AssociationTypeMismatch in PagesController#create Author(#40328004) expected, got ActiveSupport::HashWithIndifferentAccess(#32291496) Rails.root: C:/rorapp Application Trace | Framework Trace | Full Trace app/controllers/pages_controller.rb:19:in `new' app/controllers/pages_controller.rb:19:in `create' Request Parameters: {"utf8"=&gt;"✓", "authenticity_token"=&gt;"hzBlXsdUjEDDCLp036R8bJBwep6BdATSvJPNwt0M8Dg=", "page"=&gt;{"title"=&gt;"", "body"=&gt;"", "author"=&gt;{"author"=&gt;""}, "email"=&gt;"", "reference"=&gt;"1"}, "commit"=&gt;"Submit"} Show session dump Show env dump Response Headers: None </code></pre> <p>and one more problem if I add <code>accepts_nested_attributes_for :author</code> to my Page model, then the field is not displayed at all. I really want to accomplish this.. any help?</p>
 

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