使用带有关联的 Rails Gem Active Admin [英] Using Rails Gem Active Admin with Associations

问题描述

我正在试用新的 Rails gem http://activeadmin.info/，效果很好！但是，我找不到有关如何跨协会使用它的任何文档.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

会员加入表还包括一些额外的数据(即:出勤率).我正在尝试同时显示课程和学生姓名的成员资格 - 并允许对这些姓名进行过滤/排序.据我所知，Active Admin 不能跨关联工作.有没有其他人成功地做到了这一点，或者找到了另一个可以做到的宝石?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

不要忘记连接表的迁移(:id 到 false！)

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

现在在您的 ActiveAdmin 资源中定义表单，覆盖默认值

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

这篇关于使用带有关联的 Rails Gem Active Admin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！