使用Rails Gem Active Admin和关联 [英] Using Rails Gem Active Admin with Associations

问题描述

我正在尝试使用新的Rails gem http://activeadmin.info/ ，它的效果非常好！不过，我找不到关于如何在关联中使用它的任何文档。例如：

I'm trying out the new Rails gem http://activeadmin.info/ and it's working great! However I can't find any documentation on how to use it across associations. For example:

class Membership < ActiveRecord::Base
  belongs_to :course
  belongs_to :person

class Course < ActiveRecord::Base
  has_many :memberships
  has_many :people,  :through => :memberships

class Person < ActiveRecord::Base
  has_many :memberships
  has_many :courses, :through => :memberships

成员资格连接表也包含一些额外数据（即：出勤率）。我试图向会员显示课程名称和学生姓名 - 并允许对这些名称进行过滤/排序。据我所知，Active Admin并不适用于各种关联。有没有其他人成功地做到这一点，或找到另一个宝石呢？非常感谢！

The membership join table includes some extra data as well (ie: attendance). I'm trying to show the membership with both the course and student name - and allow filtering / sorting on those names. As far as I have found, Active Admin doesn't work across associations. Has anyone else been successful in doing that, or found another gem that does? Thanks so much!

推荐答案

ingredient.rb

class Ingredient < ActiveRecord::Base
has_and_belongs_to_many :products, :join_table => :ingredients_products
end

product.rb

class Product < ActiveRecord::Base
  has_and_belongs_to_many :ingredients, :join_table => :ingredients_products
end

不要忘记加入表的迁移（：id ）

don't forget the migrations for the joining table (:id to false!)

class CreateProductsIngredients < ActiveRecord::Migration
  def self.up
    create_table :ingredients_products,:id => false do |t|
      t.integer :product_id
      t.integer :ingredient_id
      t.timestamps
    end
  end

  def self.down
    drop_table :products_ingredients
  end
end

现在在你的ActiveAdmin中定义表单资源，重写默认值

Now define the form in you ActiveAdmin resource, override the default

ActiveAdmin.register Product do
  form do |f|
        f.inputs "Details" do
          f.input :product_name
          f.input :brand
          f.input :ingredients # don't forget this one!
        end
end

这篇关于使用Rails Gem Active Admin和关联的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！