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POFind ID does not find the id and create
 

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  1. POFind ID does not find the id and create
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    <p>I have a 2 views that I want to use before the create action. </p> <p>1st view is add_sample_details.html.erb</p> <pre><code>&lt;% form_tag add_expt_details_samples_path :method =&gt; :post do %&gt; &lt;% for sample in @samples %&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;p&gt;&lt;center&gt;&lt;%= submit_tag "Next" %&gt;&lt;/center&gt;&lt;/p&gt; &lt;% for samp in @samples %&gt; &lt;%= hidden_field_tag("sample_ids[]", samp.id) %&gt; &lt;% end %&gt; &lt;% end %&gt; </code></pre> <p>in the SamplesController, the add_expt_details looks like this</p> <pre><code>def add_expt_details # Collect the samples that were sent @expt_samples = Sample.find(params[:sample_ids]) end </code></pre> <p>and the add_expt_details.html.erb looks like this</p> <pre><code>&lt;% form_for @expt_samples, :url =&gt; create_study_samples_path, :html =&gt; { :method =&gt; :put } do |f| %&gt; &lt;% @expt_samples.each do |samp|%&gt; &lt;% f.fields_for :expts do |form| %&gt; &lt;%= form.label :experiment_title %&gt; &lt;%= form.text_field :expt_title, :size =&gt; 15 %&gt;&lt;br \&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>and my create_study action is like this</p> <pre><code>def create_study @study = Study.new(params[:study]) # this method collects all the samples from the add_sra_details view from the hidden_field_tag if current_user.id? # Put the current user_id in the study.user_id @study.user_id = current_user.id if @study.save # Save the values for the study # Update the Sample attributes @samples = Sample.update(params[:samples].keys, params[:samples].values).reject { |p| p.errors.empty? } # For all those sample_ids selected by the user, put the study ids in the sample_study_id @samples.each do |samp| @study.samples &lt;&lt; samp end # get the ids_sent from the add_expt_details @expt_samples = Sample.find(params[:id]) # A Flash message stating the details would be prefereable..! (Means you have to do it) flash[:success] = "Your Study has been Created" redirect_to add_expt_details_samples_path else flash[:error] = "Study Faulty" render :action =&gt; "add_sra_details" end end end </code></pre> <p>The error message I get when I keep the @expt_samples = Sample.find(params[:id]) is "undefined method `keys' for nil:NilClass"</p> <p>and If I dont have the @expt_samples, it gives me an error "Couldn't Find id in Sample"</p> <p>Can some one suggest how can I update set of sample ids from one form and also create new Expt model records that are associated to the sample_ids in another form.</p> <p>All suggestions are appreciated.</p> <p>Cheers</p>
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