Question

I have an Issue model and a Comment model. On the issue#show view, I have a comment form. I create the @comment for the form in the issue#show controller action, and then pass it to the comment#create controller action to actually create and save the comment to the db. However, once the @comment params are passed to the comment#create action, I no longer have the issue_id information that I need. How would I pass that information? Here are my files:

<%= form_for @comment do |f| %>
    <%= render 'comment_fields', :f => f %>
    <%= f.submit "Submit" %>
<% end %>

issue controller:

  def show
     @issue = Issue.find(params[:id])
     @votes = Votership.where(:issue_id => @issue.id)
     @current_user_vote = @votes.where(:user_id => current_user.id).first
     @comment = Comment.new
  end

and the comment controller:

  def create
    @comment = Comment.new(params[:comment])
    @comment.save
    redirect_to :back
  end

Answer 1

You just need to modify the way you create your @comment in the show action

def show
  @issue = Issue.find(params[:id])
  @votes = Votership.where(:issue_id => @issue.id)
  @current_user_vote = @votes.where(:user_id => current_user.id).first
  @comment = @issue.comments.build # assigns issue_id to comment
end

Now when you render the form for @comment, the issue_id should be present in the hidden form inputs

---

This is unrelated to your question, but I’m also noticing the way you’re loading @current_user_vote

@current_user_vote = @votes.where(:user_id => current_user.id).first

You should probably do this as:

@current_user_vote = current_user.votes.first