ruby-on-rails - rails 4 中不允许的参数

Question

我读过 collection_check_boxes但我不明白如何设置选中的值。
我有以下模型:

class Objective < ActiveRecord::Base

  has_many :indicators
  has_many :objective_children, class_name: "Objective", foreign_key: "parent_id"

  def objective_ids
    objective_children.collect{|o| o.id}
  end

  def objective_ids= objectives_ids
    objectives_ids.each do |id|
      objective_children << Objective.find(id)
    end
  end
end

编辑 View :

<%= form_for(@objective) do |f| %>
  <%= f.collection_check_boxes :objective_ids, Objective.all, :id, :name %>
  <%= f.submit %>
<% end %>

html 复选框没问题，但我不知道如何将值设置为 objective .我尝试定义 objective_ids= objectives_ids但什么也没有发生。

在 Controller 中:

class ObjectivesController < ApplicationController
    def objective_params
      params.require(:objective).permit(:name, :code, :description, :objective_ids)
    end
end

编辑
日志文件显示 Unpermitted parameters: perspective_id, objective_ids

Answer 1

我解决了改变线路

params.require(:objective).permit(:name, :code, :description, :objective_ids)

到

params.require(:objective).permit(:name, :code, :description, :objective_ids => [])