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PONested attributes has_many passing and collecting ids to build model
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  1. PONested attributes has_many passing and collecting ids to build model
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    copied!<p>I have this form: </p> <pre><code>&lt;% form_tag add_expt_details_samples_path, :method =&gt; :post do %&gt; &lt;% for sample in @samples %&gt; &lt;% if sample.study_id == @study.id %&gt; &lt;% fields_for "samples[]", sample do |form| %&gt; &lt;fieldset&gt; &lt;legend&gt;Sample Name: &lt;%= sample.name %&gt;&lt;/legend&gt; &lt;p&gt;&lt;center&gt;&lt;%= form.label :sample_title %&gt; &lt;%= form.text_field :sample_title, :size =&gt; 25 %&gt;&lt;/center&gt;&lt;/p&gt; &lt;table&gt; &lt;tr&gt; &lt;td&gt; &lt;%= form.label :taxon_id %&gt; &lt;%= form.text_field :taxon_id, :size =&gt; 15 %&gt; &lt;/td&gt; &lt;td&gt; &lt;%= form.label :scientific_name %&gt; &lt;%= form.text_field :scientific_name, :size =&gt; 20 %&gt; &lt;/td&gt; &lt;td&gt; &lt;%= form.label :common_name %&gt; &lt;%= form.text_field :common_name, :size =&gt; 15 %&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; &lt;p&gt; &lt;center&gt; &lt;%= form.label :sample_descripition %&gt;&lt;br \&gt; &lt;%= form.text_area :description %&gt; &lt;/center&gt; &lt;/p&gt; &lt;/fieldset&gt; &lt;% end %&gt; &lt;% end %&gt; &lt;% end %&gt; &lt;p&gt;&lt;center&gt;&lt;%= submit_tag "Next" %&gt;&lt;/center&gt;&lt;/p&gt; &lt;% end %&gt; </code></pre> <p>I would like to collect the samples[] in add_expt_details action so that I could render a post method view for adding new model records for the samples[] ids.</p> <p>my action is as follows</p> <pre><code>def add_expt_details # Collect the samples that were sent @expt_samples = Sample.find(params[:samples]) # @expt_samples.each do |samp| # samp.expts.build # end end </code></pre> <p>and then send them to a create action where the sample details are updated and the expt values can be created. </p> <pre><code>def create_study @samples = Sample.update(params[:samples].keys, params[:samples].values).reject { |p| p.errors.empty? } if @samples.empty? flash[:notice] = "Samples updated" redirect_to :action =&gt; "add_expt_details", :anchor =&gt; "ok" else render :action =&gt; 'edit_individual' end end </code></pre> <p>is there a way to achieve this, I have used accepted_nested_attributes_for :expts, :dependent => :destroy. But I seem to be wrong some where and I do not want to have a form with many fields. </p> <p>The error message I get is "Unknown key(s): 3, 6, 12"</p> <p>All suggestions are appreciated. </p>
 

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