用 diesel 能不能同时用多种数据库

jackalcooper — Tue, 28 Nov 2017 16:07:47 +0800

想要从 mysql 导数据到 sqlite

Hello Ruby 的作者来中国了

jackalcooper — Sun, 07 May 2017 22:28:45 +0800

似乎是在杭州有活动？有谁知道什么活动吗。 FYI Hello Ruby 是一本面向儿童的趣味编程书，讲的是 Ruby

想看 Ruby 源代码，要怎么看

jackalcooper — Thu, 31 Dec 2015 18:31:16 +0800

比如，我想看看为什么 class 类名会新建一个 constant，我要怎么在源代码里面找到这个的定义，谢谢各位前辈

active_admin 的 paging 错误

jackalcooper — Sat, 26 Dec 2015 21:19:26 +0800

错误：Collection is not a paginated scope. Set collection.page(params[:page]).per(10) before calling :paginated_collection.

unless collection.respond_to?(:num_pages)
          raise(StandardError, "Collection is not a paginated scope. Set collection.page(params[:page]).per(10) before calling :paginated_collection.")
        end
        @contents = div(class: "paginated_collection_contents")

application_controller:

class ApplicationController < ActionController::Base
  protect_from_forgery with: :exception
  helper_method :all_categories
  helper_method :all_posts
  before_filter :site_search
  def all_categories
    @categories = Category.all
  end
  def all_posts
    @all_posts = Post.all
  end
  def site_search
      @q = Post.ransack(params[:q])
      #@posts_search = @q.result(distinct: true)
      @search_posts = @q.result(distinct: true)
  end
end

ActiveAdmin resource: post

ActiveAdmin.register Post do
  permit_params   :title, :body, :category_id, :admin_user_id
  menu :label => "Blog Posts"
  index do
  column :title
    column "Author",:admin_user
    column :category
    column :created_at
    default_actions
  end
  end
index method of posts controller:

 def index
      #@content_first = Post.find(1).title
      #@content_second = "This is 2";
      @q = Post.ransack(params[:q])
      @posts = @q.result(distinct: true)
      #@posts = Post.all
    end
 end

jackalcooper (Jackal)

用 diesel 能不能同时用多种数据库

Hello Ruby 的作者来中国了

想看 Ruby 源代码，要怎么看

active_admin 的 paging 错误