Question

我正在将 3.2.2 的rails应用程序升级到rails 5.1.4 。我遇到了与attr_accessor强烈对比的问题。

控制台参数输出：为什么我被允许：false

   <ActionController::Parameters {"utf8"=>"✓", "authenticity_token"=>"8/6yMCzyPw==", "journal"=><ActionController::Parameters {"user_id"=>"1", "subject"=>"sdf", 
"body"=>"sdf", "recipients"=>["zzzzz@yahoo.com"]} permitted: false>, "commit"=>"Submit", "controller"=>"journals", "action"=>"create", "assignment_id"=>"9081"} permitted: false>

这是我的控制器创建操作： journals_controller.rb

      def create
        @facility = Facility.find(params[:facility_id])
        @journal = @facility.journals.new(journal_params)
        @journal.save
      end
  private
  def journal_params
    params.require(:journal).permit(:user_id, :body, :recipients, :subject)
  end

journal.rb

  attr_accessor :recipients

轴颈/视图/ _form.html.erb

<%= form_for [@assignments, @journal]  do |f| %>
  <%= form_legend %>
  <%= f.error_messages %>    
  <p>
    <%= f.label :subject %><%= required_field %><br />
    <%= f.text_field :subject, :size => 80 %>
  </p>

  <p>
    <%= f.label :body %><%= required_field %><br />
    <%= f.text_area :body, :cols => 80, :rows => 5 %>
  </p>

  <% unless params[:action] == 'edit' %>
        <fieldset>
          <table class="list">
            <% for group in Journal.possible_recipients.in_groups(3, false) %>
              <td>
              <% for recipient in group %>
                <%= check_box_tag "journal[recipients][]", recipient.try(:email) %> <%= bold_assignees_helper recipient %><br />
              <% end %>
              </td>
              <% end %>
          </table>
         </fieldset>
  <% end %>

  <p>
    <%= f.submit 'Submit' %>
  </p>
<% end %>

允许使用强制参数，但仍然允许：在控制台上显示为

Answer 1

将您允许的参与号更改为允许array of recipients，如下所示：

def journal_params
  params.require(:journal).permit(:user_id, :body, recipients: [], :subject)
end

如果错误仍然存在，请告诉我，我会尽力帮助您

Answer 2

除非您调用permitted = false以允许哈希中的所有参数，否则

permit!是默认值。但是它会破坏强参数的使用。

attr_accessor强烈的params问题

2 个答案: