「accepts_nested_attributes_for：people」を機能させるのに問題があります。目標は、ユーザー（私のアプリでは「Person」と呼ばれます）がサインアップ時に家族の名前を確立できるようにすることです。家族は人とは別のテーブルにいます。私はこれに関する多くのスタックオーバーフローの投稿を読みましたが、どのソリューションも機能していないようです。このエラーで繰り返し発生するテーマは、attr_accessibleに：people_attributesを追加するのを忘れています。私はこれを正しく行ったと思います。コントローラの何かを忘れている可能性があります。
私は家族対人と1対多の関係を持っています
これが私の関連コードです：
家族モデル：
class Family < ActiveRecord::Base
attr_accessible :name, :people_attributes
has_many :adventures
has_many :people
accepts_nested_attributes_for :people
end
人物モデル
class Person < ActiveRecord::Base
attr_accessible :age, :first_name, :last_name, :nickname, :family_id, :password, :password_confirmation
belongs_to :family
has_many :reviews
has_secure_password
end
ファミリービュー
<%= form_for(@family) do |f| %>
<% if @family.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@family.errors.count, "error") %> prohibited this family from being saved:</h2>
<ul>
<% @family.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<table>
<tr>
<td class="form-cell"><%= f.label :name %></td>
<td class="form-cell"><%= f.text_field :name %></td>
</tr>
<tr>
<td class="form-cell"><%= f.fields_for :person do |ts| %></td>
<td class="form-cell"><%= ts.label :first_name %></td>
<td class="form-cell"><%= ts.text_field :first_name %></td>
</tr>
<tr>
<td class="form-cell"><%= ts.label :last_name %></td>
<td class="form-cell"><%= ts.text_field :last_name %></td>
</tr>
<tr>
<td class="form-cell"><%= ts.label :age %></td>
<td class="form-cell"><%= ts.text_field :age %></td>
</tr>
<tr>
<td class="form-cell"><%= ts.label :nickname %></td>
<td class="form-cell"><%= ts.text_field :nickname %></td>
</tr>
<tr>
<td class="form-cell"><%= ts.label :password %></td>
<td class="form-cell"><%= ts.password_field :password %></td>
</tr>
<tr>
<td class="form-cell"><%= ts.label :password_confirmation %></td>
<td class="form-cell"><%= ts.password_field :password_confirmation %></td>
</tr>
<% end %>
<%= f.submit %>
以下は、開発ログからの完全なトレースです
activemodel (3.2.12) lib/active_model/mass_assignment_security/sanitizer.rb:48:in `process_removed_attributes'
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activemodel (3.2.12) lib/active_model/mass_assignment_security/sanitizer.rb:12:in `sanitize'
activemodel (3.2.12) lib/active_model/mass_assignment_security.rb:230:in `sanitize_for_mass_assignment'
activerecord (3.2.12) lib/active_record/attribute_assignment.rb:75:in `assign_attributes'
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activesupport (3.2.12) lib/active_support/callbacks.rb:405:in `__run_callback'
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activesupport (3.2.12) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.12) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (3.2.12) lib/action_dispatch/middleware/reloader.rb:65:in `call'
actionpack (3.2.12) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
actionpack (3.2.12) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
actionpack (3.2.12) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
railties (3.2.12) lib/rails/rack/logger.rb:32:in `call_app'
railties (3.2.12) lib/rails/rack/logger.rb:16:in `block in call'
activesupport (3.2.12) lib/active_support/tagged_logging.rb:22:in `tagged'
railties (3.2.12) lib/rails/rack/logger.rb:16:in `call'
actionpack (3.2.12) lib/action_dispatch/middleware/request_id.rb:22:in `call'
rack (1.4.5) lib/rack/methodoverride.rb:21:in `call'
rack (1.4.5) lib/rack/runtime.rb:17:in `call'
activesupport (3.2.12) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
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actionpack (3.2.12) lib/action_dispatch/middleware/static.rb:62:in `call'
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/Users/mikeland/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service'
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/Users/mikeland/.rvm/rubies/ruby-1.9.3-p362/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread'