Question

我一直在收到错误消息，说我在尝试销毁Feature时没有传递ID，但我使用set_feature before_action执行此操作！

完整错误：

wrong number of arguments (0 for 1)

Extracted source (around line #63):

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_feature(params)
      @feature = Feature.find(params[:id])
  end

Rails.root: C:/Users/Nick/Amnesia_Rails/Master

Application Trace | Framework Trace | Full Trace
app/controllers/apps/elements/features_controller.rb:63:in `set_feature'
Request

Parameters:

{"_method"=>"delete",
 "authenticity_token"=>"0Z/SxhhEO6OA6eiShd+1PZI0DQ9QK1I7G8wqoInz+vM=",
 "element_id"=>"3",
 "id"=>"5"}

节目观点：

    <% @app.elements.each do |element| %>
      <tr>
          <td><b><%= element.name %></b></td>
          <td><b><%= element.description %></b></td>
          <td><b><%= link_to "Remove", [@app, element], method: :delete, confirm: "Are you sure?" %></b></td>
      </tr>
      <% element.features.each do |feature| %>
          <tr>
            <td><%= feature.name %></td>
            <td><%= feature.description %></td>
            <td><%= link_to "Delete", [element, feature], method: :delete %></td>
          </tr>
      <% end %>

          <tr>
            <td><%= link_to 'Add a Feature', new_element_feature_path(element) %></td>
          </tr>
    </tr>
    <% end %>

破坏和隐私方法：

  def destroy
    @feature = Feature.find(params[:id])
    @feature.destroy
    @element = Element.find(params[:element_id])
    redirect_to(@element.app)
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_feature(params)
      @feature = Feature.find(params[:id])
    end

任何帮助将不胜感激！我很失落！

Answer 1

我认为0对于你来说非常清楚。

def set_feature(params)
end

那是错的。（params）是你的1.如果你没有传递一些东西，那就是0.而你不是。

只需进行你的before_action：

def set_feature
  @feature = Feature.find(params[:id])
end

Answer 2

before_action不会神奇地传递给参数。

我认为您应该能够访问“params”而不将其作为set_feature的参数。

Rails：参数数量错误（0表示1）

2 个答案: