Rails 3.2 のネストされた属性をテストする単純なプロジェクトに取り組んでいます。ただし、フォームを送信しようとすると、この種のエラーが発生します。
can't convert Symbol into Integer
post.rb と comment.rb
class Post < ActiveRecord::Base
attr_accessible :title, :comments_attributes
has_many :comments
accepts_nested_attributes_for :comments
validates_presence_of :title
end
class Comment < ActiveRecord::Base
attr_accessible :comment, :author
belongs_to :post
validates_presence_of :comment
validates_presence_of :author
end
posts_controller.rb
def new
@post = Post.new
@post.comments.build
respond_to do |format|
format.html # new.html.erb
format.json { render json: @post }
end
end
_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 :title %><br />
<%= f.text_field :title %>
</div>
<%= f.fields_for :comments_attributes do |builder| %>
<fieldset>
<%= builder.label :comment %><br />
<%= builder.text_field :comment %><br />
<%= builder.label :author %><br />
<%= builder.text_field :author %>
</fieldset>
<% end %>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
パラメーター
{"utf8"=>"✓",
"authenticity_token"=>"gNA0mZMIxkA+iIJjw8wsddcKxvmzaFnrgiHvFw1OrYA=",
"post"=>{"title"=>"Dummy Title",
"comments_attributes"=>{"comment"=>"Dummy Comment",
"author"=>"Dummy Author"}},
"commit"=>"Create Post"}