CODEWITHSUNDEEP
ruby-on-railsformsruby-on-rails-4nested-forms
wyc
wyc

Reputation: 55263

Why is my nested form not showing up at all?

This is what I have:

post.rb:

class Post < ActiveRecord::Base
  has_many :replies, :dependent => :destroy
  accepts_nested_attributes_for :replies, :allow_destroy => true
end

reply.rb:

class Reply < ActiveRecord::Base
  belongs_to :post
end

posts/_reply_fields.html.erb:

<p>
  <%= f.label :content, "Reply" %><br />
  <%= f.text_area :content, :rows => 3 %><br />
</p>

posts/_form.html.erb:

<%= form_for(@post) do |f| %>
  <% if @post.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@post.errors.count, "error") %> prohibited this post from being saved:</h2>

      <ul>
      <% @post.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <div class="field">
    <%= f.label :content %><br>
    <%= f.text_field :content %>
  </div>
  <div class="field">
    <%= f.label :user %><br>
    <%= f.text_field :user %>
  </div>
  <div class="replies">
    <% f.fields_for :replies do |builder| %>
      <%= render 'reply_fields', :f => builder %>
    <% end %>
  </div>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

schema.rb:

  create_table "posts", force: true do |t|
    t.string   "content"
    t.string   "user"
    t.datetime "created_at"
    t.datetime "updated_at"
  end

  create_table "replies", force: true do |t|
    t.string   "content"
    t.datetime "created_at"
    t.datetime "updated_at"
    t.integer  "post_id"
  end

The output in the replies parts is just:

<div class="replies">
  </div>

The reply fields are not showing up at all. What could be the problem?

Upvotes: 0

Views: 66

Answers (2)

Richard Peck
Richard Peck

Reputation: 76774

Further to the comment & answer, you also need to build the replies ActiveRecord objects:

#app/controllers/posts_controller.rb
def new
    @post = Post.new
    @post.replies.build 
end

Upvotes: 1

Thaha kp
Thaha kp

Reputation: 3709

  <div class="replies">
    <%= f.fields_for :replies do |builder| %>
      <%= render 'reply_fields', :f => builder %>
    <% end %>
  </div>

Upvotes: 1

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