Ruby on rails Mysql2:：错误：列存在时未知列活动管理员注册模型

更新

我只是注意到我的collections表实际上没有用户id。我刚刚加了

  create_table "collections", force: true do |t|
    t.integer  "collectable_id"
    t.string   "collectable_type"
    t.string   "title"
    t.string   "description"
    t.datetime "created_at"
    t.datetime "updated_at"
    t.boolean  "team"
    t.integer  "user_id"
  end

但它仍然给我一个错误

使用控制器更新

class CollectionsController < ApplicationController
  before_filter :require_user, except: [:index, :show]

  def index
    if params[:user_id]
      @collections = User.find(params[:user_id]).collections
    elsif params[:pic_id]
      @pic = Pic.find(params[:pic_id])
      @collections = current_user.collections
      render partial: 'modal', layout: false
    else
      @collections = current_user.collections
    end
  end

  def edit
    @collection = Collection.find params[:id]
  end

  def update
    @collection = Collection.find params[:id]

    if @collection.update_attributes(collection_params)
      redirect_to collections_path
    else
      render 'edit'
    end
  end

  def create
    @collection = Collection.new(collection_params)
    @collection.collectable = current_user

    if @collection.save
      @pic = @collection.pics.first
      @collections = current_user.collections
      render partial: 'modal', layout: false
    end
  end

  def destroy
    @collection = Collection.find(params[:id])

    if current_user.collections.include? @collection or current_user.admin?
      @collection.destroy
    else
      flash[:alert] = 'You do not have permission to delete this inspiration collection'
    end
    redirect_to collections_path
  end

  def show
    @collection = Collection.find params[:id]
    @brand = Brand.find(params[:from_brand_id]) if params[:from_brand_id]
  end

  def remove_pic
    @collection = Collection.find params[:id]

    if @collection.collectable_type == 'User' and current_user.id == @collection.collectable_id
      @collection.pic_relationships.where(pic_id: params[:pic_id]).each{|pic_relationship| pic_relationship.destroy}
    end

    @pic = Pic.find params[:pic_id]
    @collections = current_user.collections
    render partial: 'collections/modal', layout: false
  end

  private

  def collection_params
    params.require(:collection).permit(:title, pic_relationships_attributes: [:id, :pic_id, :_destroy])
  end
end

我使用的是rails 4，所以我允许在我的app/admin/collection模型中使用params

ActiveAdmin.register Collection do

  permit_params :collectable_id, :collectable_type, :title, :description, :created_at, :updated_at, :team


  # See permitted parameters documentation:
  # https://github.com/activeadmin/activeadmin/blob/master/docs/2-resource-customization.md#setting-up-strong-parameters
  #
  # permit_params :list, :of, :attributes, :on, :model
  #
  # or
  #
  # permit_params do
  #   permitted = [:permitted, :attributes]
  #   permitted << :other if resource.something?
  #   permitted
  # end
end

当我走到我的管理面板，点击记录下的编辑

我明白了

ActiveRecord::StatementInvalid at /admin/collections/3/edit
Mysql2::Error: Unknown column 'collections.collectable_type' in 'where clause': SELECT  `users`.* FROM `users`  WHERE `users`.`id` = 1 AND (`collections`.`collectable_type` = 'User')  ORDER BY `users`.`id` ASC LIMIT 1

---

可收集类型的值为user，单击view时，我可以在管理仪表板中看到它。数据存在，为什么会说缺少列？

您的查询如下所示

SELECT  `users`.* FROM `users`  WHERE `users`.`id` = 1 AND (`collections`.`collectable_type` = 'User')  ORDER BY `users`.`id` ASC LIMIT 1

如果仔细查看查询，您将从users表中进行选择。users表不知道有关collections.collectable\u类型的信息

您应该将查询集合与用户联接起来

SELECT  `users`.* FROM `users` join collections on collections.collectable_id = users.id WHERE `users`.`id` = 1 AND (`collections`.`collectable_type` = 'User')  ORDER BY `users`.`id` ASC LIMIT 1

---

发布您的收藏控制器我在active admin中没有控制器。我仅注册集合模型/表格。我不知道它为什么通过用户表运行sql查询。

SELECT  `users`.* FROM `users`  WHERE `users`.`id` = 1 AND (`collections`.`collectable_type` = 'User')  ORDER BY `users`.`id` ASC LIMIT 1

SELECT  `users`.* FROM `users` join collections on collections.collectable_id = users.id WHERE `users`.`id` = 1 AND (`collections`.`collectable_type` = 'User')  ORDER BY `users`.`id` ASC LIMIT 1