Hello everyone, I'm currently working on the functionality that users can create listings that are than saved in categories. I created tables and relationships but I cannot get the listings do be saved in the categories. Here is what I have: Model category.rb class Category < ActiveRecord::Base has_many :listings end model listing.rb class Listing < ActiveRecord::Base belongs_to :user belongs_to :category default_scope -> { order('created_at DESC') } validates :location, presence: true, length: { maximum: 20 } validates :title, presence: true, length: { maximum: 20 } validates :user_id, presence: true validates :description, presence: true end Listings controller def new @listing = Listing.new @listings = Listing.paginate(page: params[:page]) @categories = Category.all end def create @listing = current_user.listings.build(listing_params) @categories = Category.all if @listing.save flash[:success] = "Job Post created" redirect_to current_user else render 'listings/new' end end Views categories/new <h1>New category</h1> <%= render 'form' %> <%= link_to 'Back', categories_path %> Views categories/_form.html.erb <%= form_for(@category) do |f| %> <% if @category.errors.any? %> <div id="error_explanation"> <h2><%= pluralize(@category.errors.count, "error") %> prohibited this category from being saved:</h2> <ul> <% @category.errors.full_messages.each do |message| %> <li><%= message %></li> <% end %> </ul> </div> <% end %> <div class="field"> <%= f.label :name %><br> <%= f.text_field :name %> </div> <div class="actions"> <%= f.submit %> </div> <% end %> Views Listing/new.html.erb <div class="top"> <%= form_for(@listing) do |f| %> <%= render 'shared/error_messages', object: f.object %> </div> <h1> Create Job Post </h1> <body> <div class=" form row"> <div class="span6 offset3 "> <%= f.label :title %> <%= f.text_field :title %> <%= f.label :location %> <%= f.text_field :location %> <br> <%= f.text_area :description, placeholder: "Compose new listing...", class: "description_form" %> <br> <p><b>Category:</b><br> <select name="listing[category_id]"> <% @categories.each do |category| %> <option value="<%= category.id %>" <%= ' selected' if category.id == @listing.category_id %>> <%= category.name %> </option> <% end %> </select></p> </div> <div class="space-button-form"> <%= f.submit "Post", class: "tfbutton tfbutton-search tfbutton-sign-up post" %> </div> <% end %> </div> </div> </div> I have a listings table with the following columns: id title description location user_id created_at updated_at category_id and categories table id name created_at updated_at When I create a new listing and than check the listings table, the category_id field is blank. Does anyone know why my listings are not saved in the categories? Thank you very much -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/f7fcc7315842e41f2de3ce28aef53b3b%40ruby-forum.com. For more options, visit https://groups.google.com/d/optout.